/usr/src/sysdig-0.19.1/ppm_fillers.c is in sysdig-dkms 0.19.1-1build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 2013-2014 Draios inc.
This file is part of sysdig.
sysdig is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
sysdig is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with sysdig. If not, see <http://www.gnu.org/licenses/>.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/compat.h>
#include <linux/cdev.h>
#include <asm/unistd.h>
#include <net/sock.h>
#include <net/af_unix.h>
#include <net/compat.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/file.h>
#include <linux/futex.h>
#include <linux/fs_struct.h>
#include <linux/ptrace.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/quota.h>
#include <linux/tty.h>
#include <linux/uaccess.h>
#ifdef CONFIG_CGROUPS
#include <linux/cgroup.h>
#endif
#include <asm/mman.h>
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 20)
#include "ppm_syscall.h"
#else
#include <asm/syscall.h>
#endif
#include "ppm_ringbuffer.h"
#include "ppm_events_public.h"
#include "ppm_events.h"
#include "ppm.h"
/* This is described in syscall(2). Some syscalls take 64-bit arguments. On
* arches that have 64-bit registers, these arguments are shipped in a register.
* On 32-bit arches, however, these are split between two consecutive registers,
* with some alignment requirements. Some require an odd/even pair while some
* others require even/odd. For now I assume they all do what x86_32 does, and
* we can handle the rest when we port those.
*/
#ifdef CONFIG_64BIT
#define _64BIT_ARGS_SINGLE_REGISTER
#endif
static int f_sys_generic(struct event_filler_arguments *args); /* generic syscall event filler that includes the system call number */
static int f_sys_empty(struct event_filler_arguments *args); /* empty filler */
static int f_sys_single(struct event_filler_arguments *args); /* generic enter filler that copies a single argument syscall into a single parameter event */
static int f_sys_single_x(struct event_filler_arguments *args); /* generic exit filler that captures an integer */
static int f_sys_open_x(struct event_filler_arguments *args);
static int f_sys_read_x(struct event_filler_arguments *args);
static int f_sys_write_x(struct event_filler_arguments *args);
static int f_sys_execve_e(struct event_filler_arguments *args);
static int f_proc_startupdate(struct event_filler_arguments *args);
static int f_sys_socketpair_x(struct event_filler_arguments *args);
static int f_sys_connect_x(struct event_filler_arguments *args);
static int f_sys_accept4_e(struct event_filler_arguments *args);
static int f_sys_accept_x(struct event_filler_arguments *args);
static int f_sys_send_e(struct event_filler_arguments *args);
static int f_sys_send_x(struct event_filler_arguments *args);
static int f_sys_sendto_e(struct event_filler_arguments *args);
static int f_sys_sendmsg_e(struct event_filler_arguments *args);
static int f_sys_sendmsg_x(struct event_filler_arguments *args);
static int f_sys_recv_e(struct event_filler_arguments *args);
static int f_sys_recv_x(struct event_filler_arguments *args);
static int f_sys_recvfrom_e(struct event_filler_arguments *args);
static int f_sys_recvfrom_x(struct event_filler_arguments *args);
static int f_sys_recvmsg_e(struct event_filler_arguments *args);
static int f_sys_recvmsg_x(struct event_filler_arguments *args);
static int f_sys_shutdown_e(struct event_filler_arguments *args);
static int f_sys_pipe_x(struct event_filler_arguments *args);
static int f_sys_eventfd_e(struct event_filler_arguments *args);
static int f_sys_futex_e(struct event_filler_arguments *args);
static int f_sys_lseek_e(struct event_filler_arguments *args);
static int f_sys_llseek_e(struct event_filler_arguments *args);
static int f_sys_socket_bind_x(struct event_filler_arguments *args);
static int f_sys_poll_e(struct event_filler_arguments *args);
static int f_sys_poll_x(struct event_filler_arguments *args);
static int f_sys_openat_e(struct event_filler_arguments *args);
#ifndef _64BIT_ARGS_SINGLE_REGISTER
static int f_sys_pread64_e(struct event_filler_arguments *args);
static int f_sys_preadv_e(struct event_filler_arguments *args);
#endif
static int f_sys_writev_e(struct event_filler_arguments *args);
static int f_sys_pwrite64_e(struct event_filler_arguments *args);
static int f_sys_readv_x(struct event_filler_arguments *args);
static int f_sys_writev_e(struct event_filler_arguments *args);
static int f_sys_writev_pwritev_x(struct event_filler_arguments *args);
static int f_sys_preadv_x(struct event_filler_arguments *args);
static int f_sys_pwritev_e(struct event_filler_arguments *args);
static int f_sys_nanosleep_e(struct event_filler_arguments *args);
static int f_sys_getrlimit_setrlimit_e(struct event_filler_arguments *args);
static int f_sys_getrlimit_setrlrimit_x(struct event_filler_arguments *args);
static int f_sys_prlimit_e(struct event_filler_arguments *args);
static int f_sys_prlimit_x(struct event_filler_arguments *args);
#ifdef CAPTURE_CONTEXT_SWITCHES
static int f_sched_switch_e(struct event_filler_arguments *args);
#endif
static int f_sched_drop(struct event_filler_arguments *args);
static int f_sched_fcntl_e(struct event_filler_arguments *args);
static int f_sys_ptrace_e(struct event_filler_arguments *args);
static int f_sys_ptrace_x(struct event_filler_arguments *args);
static int f_sys_mmap_e(struct event_filler_arguments *args);
static int f_sys_brk_munmap_mmap_x(struct event_filler_arguments *args);
static int f_sys_renameat_x(struct event_filler_arguments *args);
static int f_sys_symlinkat_x(struct event_filler_arguments *args);
static int f_sys_procexit_e(struct event_filler_arguments *args);
static int f_sys_sendfile_e(struct event_filler_arguments *args);
static int f_sys_sendfile_x(struct event_filler_arguments *args);
static int f_sys_quotactl_e(struct event_filler_arguments *args);
static int f_sys_quotactl_x(struct event_filler_arguments *args);
static int f_sys_sysdigevent_e(struct event_filler_arguments *args);
static int f_sys_getresuid_and_gid_x(struct event_filler_arguments *args);
#ifdef CAPTURE_SIGNAL_DELIVERIES
static int f_sys_signaldeliver_e(struct event_filler_arguments *args);
#endif
#ifdef CAPTURE_PAGE_FAULTS
static int f_sys_pagefault_e(struct event_filler_arguments *args);
#endif
static int f_sys_setns_e(struct event_filler_arguments *args);
static int f_sys_unshare_e(struct event_filler_arguments *args);
static int f_sys_flock_e(struct event_filler_arguments *args);
static int f_cpu_hotplug_e(struct event_filler_arguments *args);
static int f_sys_semop_e(struct event_filler_arguments *args);
static int f_sys_semop_x(struct event_filler_arguments *args);
static int f_sys_semget_e(struct event_filler_arguments *args);
static int f_sys_semctl_e(struct event_filler_arguments *args);
static int f_sys_semctl_x(struct event_filler_arguments *args);
static int f_sys_ppoll_e(struct event_filler_arguments *args);
static int f_sys_mount_e(struct event_filler_arguments *args);
static int f_sys_access_e(struct event_filler_arguments *args);
static int f_sys_access_x(struct event_filler_arguments *args);
/*
* Note, this is not part of g_event_info because we want to share g_event_info with userland.
* However, separating this information in a different struct is not ideal and we should find a better way.
*/
const struct ppm_event_entry g_ppm_events[PPM_EVENT_MAX] = {
[PPME_GENERIC_E] = {f_sys_generic},
[PPME_GENERIC_X] = {f_sys_generic},
[PPME_SYSCALL_OPEN_E] = {f_sys_empty},
[PPME_SYSCALL_OPEN_X] = {f_sys_open_x},
[PPME_SYSCALL_CREAT_E] = {f_sys_empty},
[PPME_SYSCALL_CREAT_X] = {PPM_AUTOFILL, 3, APT_REG, {{AF_ID_RETVAL}, {0}, {AF_ID_USEDEFAULT, 0} } },
[PPME_SYSCALL_CLOSE_E] = {f_sys_single},
[PPME_SYSCALL_CLOSE_X] = {f_sys_single_x},
[PPME_SYSCALL_READ_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {2} } },
[PPME_SYSCALL_READ_X] = {f_sys_read_x},
[PPME_SYSCALL_WRITE_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {2} } },
[PPME_SYSCALL_WRITE_X] = {f_sys_write_x},
[PPME_PROCEXIT_1_E] = {f_sys_procexit_e},
[PPME_SOCKET_SOCKET_E] = {PPM_AUTOFILL, 3, APT_SOCK, {{0}, {1}, {2} } },
[PPME_SOCKET_SOCKET_X] = {f_sys_single_x},
[PPME_SOCKET_SOCKETPAIR_E] = {PPM_AUTOFILL, 3, APT_SOCK, {{0}, {1}, {2} } },
[PPME_SOCKET_SOCKETPAIR_X] = {f_sys_socketpair_x},
[PPME_SOCKET_BIND_E] = {PPM_AUTOFILL, 1, APT_SOCK, {{0} } },
[PPME_SOCKET_BIND_X] = {f_sys_socket_bind_x},
[PPME_SOCKET_CONNECT_E] = {PPM_AUTOFILL, 1, APT_SOCK, {{0} } },
[PPME_SOCKET_CONNECT_X] = {f_sys_connect_x},
[PPME_SOCKET_LISTEN_E] = {PPM_AUTOFILL, 2, APT_SOCK, {{0}, {1} } },
[PPME_SOCKET_LISTEN_X] = {f_sys_single_x},
[PPME_SOCKET_ACCEPT_5_E] = {f_sys_empty},
[PPME_SOCKET_ACCEPT_5_X] = {f_sys_accept_x},
[PPME_SOCKET_ACCEPT4_5_E] = {f_sys_accept4_e},
[PPME_SOCKET_ACCEPT4_5_X] = {f_sys_accept_x},
[PPME_SOCKET_SEND_E] = {f_sys_send_e},
[PPME_SOCKET_SEND_X] = {f_sys_send_x},
[PPME_SOCKET_SENDTO_E] = {f_sys_sendto_e},
[PPME_SOCKET_SENDTO_X] = {f_sys_send_x},
[PPME_SOCKET_SENDMSG_E] = {f_sys_sendmsg_e},
[PPME_SOCKET_SENDMSG_X] = {f_sys_sendmsg_x},
[PPME_SOCKET_RECV_E] = {f_sys_recv_e},
[PPME_SOCKET_RECV_X] = {f_sys_recv_x},
[PPME_SOCKET_RECVFROM_E] = {f_sys_recvfrom_e},
[PPME_SOCKET_RECVFROM_X] = {f_sys_recvfrom_x},
[PPME_SOCKET_RECVMSG_E] = {f_sys_recvmsg_e},
[PPME_SOCKET_RECVMSG_X] = {f_sys_recvmsg_x},
[PPME_SOCKET_SHUTDOWN_E] = {f_sys_shutdown_e},
[PPME_SOCKET_SHUTDOWN_X] = {f_sys_single_x},
[PPME_SYSCALL_PIPE_E] = {f_sys_empty},
[PPME_SYSCALL_PIPE_X] = {f_sys_pipe_x},
[PPME_SYSCALL_EVENTFD_E] = {f_sys_eventfd_e},
[PPME_SYSCALL_EVENTFD_X] = {f_sys_single_x},
[PPME_SYSCALL_FUTEX_E] = {f_sys_futex_e},
[PPME_SYSCALL_FUTEX_X] = {f_sys_single_x},
[PPME_SYSCALL_STAT_E] = {f_sys_empty},
[PPME_SYSCALL_STAT_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_LSTAT_E] = {f_sys_empty},
[PPME_SYSCALL_LSTAT_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_FSTAT_E] = {f_sys_single},
[PPME_SYSCALL_FSTAT_X] = {f_sys_single_x},
[PPME_SYSCALL_STAT64_E] = {f_sys_empty},
[PPME_SYSCALL_STAT64_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_LSTAT64_E] = {f_sys_empty},
[PPME_SYSCALL_LSTAT64_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_FSTAT64_E] = {f_sys_single},
[PPME_SYSCALL_FSTAT64_X] = {f_sys_single_x},
[PPME_SYSCALL_EPOLLWAIT_E] = {PPM_AUTOFILL, 1, APT_REG, {{2} } },
[PPME_SYSCALL_EPOLLWAIT_X] = {f_sys_single_x},
[PPME_SYSCALL_POLL_E] = {f_sys_poll_e},
[PPME_SYSCALL_POLL_X] = {f_sys_poll_x},
[PPME_SYSCALL_SELECT_E] = {f_sys_empty},
[PPME_SYSCALL_SELECT_X] = {f_sys_single_x},
[PPME_SYSCALL_NEWSELECT_E] = {f_sys_empty},
[PPME_SYSCALL_NEWSELECT_X] = {f_sys_single_x},
[PPME_SYSCALL_LSEEK_E] = {f_sys_lseek_e},
[PPME_SYSCALL_LSEEK_X] = {f_sys_single_x},
[PPME_SYSCALL_LLSEEK_E] = {f_sys_llseek_e},
[PPME_SYSCALL_LLSEEK_X] = {f_sys_single_x},
[PPME_SYSCALL_IOCTL_3_E] = {PPM_AUTOFILL, 3, APT_REG, {{0}, {1}, {2} } },
[PPME_SYSCALL_IOCTL_3_X] = {f_sys_single_x},
[PPME_SYSCALL_GETCWD_E] = {f_sys_empty},
[PPME_SYSCALL_GETCWD_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_CHDIR_E] = {f_sys_empty},
[PPME_SYSCALL_CHDIR_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_FCHDIR_E] = {f_sys_single},
[PPME_SYSCALL_FCHDIR_X] = {f_sys_single_x},
[PPME_SYSCALL_MKDIR_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {AF_ID_USEDEFAULT, 0} } },
[PPME_SYSCALL_MKDIR_X] = {f_sys_single_x},
[PPME_SYSCALL_RMDIR_E] = {f_sys_single},
[PPME_SYSCALL_RMDIR_X] = {f_sys_single_x},
[PPME_SYSCALL_OPENAT_E] = {f_sys_openat_e},
[PPME_SYSCALL_OPENAT_X] = {f_sys_single_x},
[PPME_SYSCALL_LINK_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {1} } },
[PPME_SYSCALL_LINK_X] = {f_sys_single_x},
[PPME_SYSCALL_LINKAT_E] = {PPM_AUTOFILL, 4, APT_REG, {{0}, {1}, {2}, {3} } },
[PPME_SYSCALL_LINKAT_X] = {f_sys_single_x},
[PPME_SYSCALL_UNLINK_E] = {f_sys_single},
[PPME_SYSCALL_UNLINK_X] = {f_sys_single_x},
[PPME_SYSCALL_UNLINKAT_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {1} } },
[PPME_SYSCALL_UNLINKAT_X] = {f_sys_single_x},
#ifdef _64BIT_ARGS_SINGLE_REGISTER
[PPME_SYSCALL_PREAD_E] = {PPM_AUTOFILL, 3, APT_REG, {{0}, {2}, {3} } },
#else
[PPME_SYSCALL_PREAD_E] = {f_sys_pread64_e},
#endif
[PPME_SYSCALL_PREAD_X] = {f_sys_read_x},
[PPME_SYSCALL_PWRITE_E] = {f_sys_pwrite64_e},
[PPME_SYSCALL_PWRITE_X] = {f_sys_write_x},
[PPME_SYSCALL_READV_E] = {f_sys_single},
[PPME_SYSCALL_READV_X] = {f_sys_readv_x},
[PPME_SYSCALL_WRITEV_E] = {f_sys_writev_e},
[PPME_SYSCALL_WRITEV_X] = {f_sys_writev_pwritev_x},
#ifdef _64BIT_ARGS_SINGLE_REGISTER
[PPME_SYSCALL_PREADV_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {3} } },
#else
[PPME_SYSCALL_PREADV_E] = {f_sys_preadv_e},
#endif
[PPME_SYSCALL_PREADV_X] = {f_sys_preadv_x},
[PPME_SYSCALL_PWRITEV_E] = {f_sys_pwritev_e},
[PPME_SYSCALL_PWRITEV_X] = {f_sys_writev_pwritev_x},
[PPME_SYSCALL_DUP_E] = {PPM_AUTOFILL, 1, APT_REG, {{0} } },
[PPME_SYSCALL_DUP_X] = {f_sys_single_x},
/* Mask and Flags not implemented yet */
[PPME_SYSCALL_SIGNALFD_E] = {PPM_AUTOFILL, 3, APT_REG, {{0}, {AF_ID_USEDEFAULT, 0}, {AF_ID_USEDEFAULT, 0} } },
[PPME_SYSCALL_SIGNALFD_X] = {f_sys_single_x},
[PPME_SYSCALL_KILL_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {1} } },
[PPME_SYSCALL_KILL_X] = {f_sys_single_x},
[PPME_SYSCALL_TKILL_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {1} } },
[PPME_SYSCALL_TKILL_X] = {f_sys_single_x},
[PPME_SYSCALL_TGKILL_E] = {PPM_AUTOFILL, 3, APT_REG, {{0}, {1}, {2} } },
[PPME_SYSCALL_TGKILL_X] = {f_sys_single_x},
[PPME_SYSCALL_NANOSLEEP_E] = {f_sys_nanosleep_e},
[PPME_SYSCALL_NANOSLEEP_X] = {f_sys_single_x},
[PPME_SYSCALL_TIMERFD_CREATE_E] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_USEDEFAULT, 0}, {AF_ID_USEDEFAULT, 0} } },
[PPME_SYSCALL_TIMERFD_CREATE_X] = {f_sys_single_x},
[PPME_SYSCALL_INOTIFY_INIT_E] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_USEDEFAULT, 0} } },
[PPME_SYSCALL_INOTIFY_INIT_X] = {f_sys_single_x},
[PPME_SYSCALL_GETRLIMIT_E] = {f_sys_getrlimit_setrlimit_e},
[PPME_SYSCALL_GETRLIMIT_X] = {f_sys_getrlimit_setrlrimit_x},
[PPME_SYSCALL_SETRLIMIT_E] = {f_sys_getrlimit_setrlimit_e},
[PPME_SYSCALL_SETRLIMIT_X] = {f_sys_getrlimit_setrlrimit_x},
[PPME_SYSCALL_PRLIMIT_E] = {f_sys_prlimit_e},
[PPME_SYSCALL_PRLIMIT_X] = {f_sys_prlimit_x},
#ifdef CAPTURE_CONTEXT_SWITCHES
[PPME_SCHEDSWITCH_6_E] = {f_sched_switch_e},
#endif
[PPME_DROP_E] = {f_sched_drop},
[PPME_DROP_X] = {f_sched_drop},
[PPME_SYSCALL_FCNTL_E] = {f_sched_fcntl_e},
[PPME_SYSCALL_FCNTL_X] = {f_sys_single_x},
[PPME_SYSCALL_EXECVE_18_E] = {f_sys_execve_e},
[PPME_SYSCALL_EXECVE_18_X] = {f_proc_startupdate},
[PPME_SYSCALL_CLONE_20_E] = {f_sys_empty},
[PPME_SYSCALL_CLONE_20_X] = {f_proc_startupdate},
[PPME_SYSCALL_BRK_4_E] = {PPM_AUTOFILL, 1, APT_REG, {{0} } },
[PPME_SYSCALL_BRK_4_X] = {f_sys_brk_munmap_mmap_x},
[PPME_SYSCALL_MMAP_E] = {f_sys_mmap_e},
[PPME_SYSCALL_MMAP_X] = {f_sys_brk_munmap_mmap_x},
[PPME_SYSCALL_MMAP2_E] = {f_sys_mmap_e},
[PPME_SYSCALL_MMAP2_X] = {f_sys_brk_munmap_mmap_x},
[PPME_SYSCALL_MUNMAP_E] = {PPM_AUTOFILL, 2, APT_REG, {{0}, {1} } },
[PPME_SYSCALL_MUNMAP_X] = {f_sys_brk_munmap_mmap_x},
[PPME_SYSCALL_SPLICE_E] = {PPM_AUTOFILL, 4, APT_REG, {{0}, {2}, {4}, {5} } },
[PPME_SYSCALL_SPLICE_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_PTRACE_E] = {f_sys_ptrace_e},
[PPME_SYSCALL_PTRACE_X] = {f_sys_ptrace_x},
[PPME_SYSCALL_RENAME_E] = {f_sys_empty},
[PPME_SYSCALL_RENAME_X] = {PPM_AUTOFILL, 3, APT_REG, {{AF_ID_RETVAL}, {0}, {1} } },
[PPME_SYSCALL_RENAMEAT_E] = {f_sys_empty},
[PPME_SYSCALL_RENAMEAT_X] = {f_sys_renameat_x},
[PPME_SYSCALL_SYMLINK_E] = {f_sys_empty},
[PPME_SYSCALL_SYMLINK_X] = {PPM_AUTOFILL, 3, APT_REG, {{AF_ID_RETVAL}, {0}, {1} } },
[PPME_SYSCALL_SYMLINKAT_E] = {f_sys_empty},
[PPME_SYSCALL_SYMLINKAT_X] = {f_sys_symlinkat_x},
[PPME_SYSCALL_FORK_20_E] = {f_sys_empty},
[PPME_SYSCALL_FORK_20_X] = {f_proc_startupdate},
[PPME_SYSCALL_VFORK_20_E] = {f_sys_empty},
[PPME_SYSCALL_VFORK_20_X] = {f_proc_startupdate},
[PPME_SYSCALL_SENDFILE_E] = {f_sys_sendfile_e},
[PPME_SYSCALL_SENDFILE_X] = {f_sys_sendfile_x},
[PPME_SYSCALL_QUOTACTL_E] = {f_sys_quotactl_e},
[PPME_SYSCALL_QUOTACTL_X] = {f_sys_quotactl_x},
[PPME_SYSCALL_SETRESUID_E] = {PPM_AUTOFILL, 3, APT_REG, {{0}, {1}, {2} } },
[PPME_SYSCALL_SETRESUID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_SETRESGID_E] = {PPM_AUTOFILL, 3, APT_REG, {{0}, {1}, {2} } },
[PPME_SYSCALL_SETRESGID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSDIGEVENT_E] = {f_sys_sysdigevent_e},
[PPME_SYSCALL_SETUID_E] = {PPM_AUTOFILL, 1, APT_REG, {{0} } },
[PPME_SYSCALL_SETUID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_SETGID_E] = {PPM_AUTOFILL, 1, APT_REG, {{0} } },
[PPME_SYSCALL_SETGID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_GETUID_E] = {f_sys_empty},
[PPME_SYSCALL_GETUID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_GETEUID_E] = {f_sys_empty},
[PPME_SYSCALL_GETEUID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_GETGID_E] = {f_sys_empty},
[PPME_SYSCALL_GETGID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_GETEGID_E] = {f_sys_empty},
[PPME_SYSCALL_GETEGID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_GETRESUID_E] = {f_sys_empty},
[PPME_SYSCALL_GETRESUID_X] = {f_sys_getresuid_and_gid_x},
[PPME_SYSCALL_GETRESGID_E] = {f_sys_empty},
[PPME_SYSCALL_GETRESGID_X] = {f_sys_getresuid_and_gid_x},
#ifdef CAPTURE_SIGNAL_DELIVERIES
[PPME_SIGNALDELIVER_E] = {f_sys_signaldeliver_e},
[PPME_SIGNALDELIVER_X] = {f_sys_empty},
#endif
[PPME_SYSCALL_GETDENTS_E] = {f_sys_single},
[PPME_SYSCALL_GETDENTS_X] = {f_sys_single_x},
[PPME_SYSCALL_GETDENTS64_E] = {f_sys_single},
[PPME_SYSCALL_GETDENTS64_X] = {f_sys_single_x},
[PPME_SYSCALL_SETNS_E] = {f_sys_setns_e},
[PPME_SYSCALL_SETNS_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_FLOCK_E] = {f_sys_flock_e},
[PPME_SYSCALL_FLOCK_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_CPU_HOTPLUG_E] = {f_cpu_hotplug_e},
[PPME_SYSCALL_SEMOP_E] = {f_sys_semop_e},
[PPME_SYSCALL_SEMOP_X] = {f_sys_semop_x},
[PPME_SYSCALL_SEMGET_E] = {f_sys_semget_e},
[PPME_SYSCALL_SEMGET_X] = {f_sys_single_x},
[PPME_SYSCALL_SEMCTL_E] = {f_sys_semctl_e},
[PPME_SYSCALL_SEMCTL_X] = {f_sys_semctl_x},
[PPME_SYSCALL_PPOLL_E] = {f_sys_ppoll_e},
[PPME_SYSCALL_PPOLL_X] = {f_sys_poll_x}, /* exit same for poll() and ppoll() */
[PPME_SYSCALL_MOUNT_E] = {f_sys_mount_e},
[PPME_SYSCALL_MOUNT_X] = {PPM_AUTOFILL, 4, APT_REG, {{AF_ID_RETVAL}, {0}, {1}, {2} } },
[PPME_SYSCALL_UMOUNT_E] = {PPM_AUTOFILL, 1, APT_REG, {{1} } },
[PPME_SYSCALL_UMOUNT_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_ACCESS_E] = {f_sys_access_e},
[PPME_SYSCALL_ACCESS_X] = {f_sys_access_x},
[PPME_SYSCALL_CHROOT_E] = {f_sys_empty},
[PPME_SYSCALL_CHROOT_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_SETSID_E] = {f_sys_empty},
[PPME_SYSCALL_SETSID_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
[PPME_SYSCALL_MKDIR_2_E] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_USEDEFAULT, 0} } },
[PPME_SYSCALL_MKDIR_2_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_RMDIR_2_E] = {f_sys_empty},
[PPME_SYSCALL_RMDIR_2_X] = {PPM_AUTOFILL, 2, APT_REG, {{AF_ID_RETVAL}, {0} } },
[PPME_SYSCALL_UNSHARE_E] = {f_sys_unshare_e},
[PPME_SYSCALL_UNSHARE_X] = {PPM_AUTOFILL, 1, APT_REG, {{AF_ID_RETVAL} } },
#ifdef CAPTURE_PAGE_FAULTS
[PPME_PAGE_FAULT_E] = {f_sys_pagefault_e},
[PPME_PAGE_FAULT_X] = {f_sys_empty},
#endif
};
#define merge_64(hi, lo) ((((unsigned long long)(hi)) << 32) + ((lo) & 0xffffffffUL))
static int f_sys_generic(struct event_filler_arguments *args)
{
int res;
long table_index = args->syscall_id - SYSCALL_TABLE_ID0;
const enum ppm_syscall_code *cur_g_syscall_code_routing_table = args->cur_g_syscall_code_routing_table;
#ifdef _HAS_SOCKETCALL
if (unlikely(args->syscall_id == args->socketcall_syscall)) {
/*
* All the socket calls should be implemented
*/
ASSERT(false);
return PPM_FAILURE_BUG;
}
#endif
/*
* name
*/
if (likely(table_index >= 0 &&
table_index < SYSCALL_TABLE_SIZE)) {
enum ppm_syscall_code sc_code = cur_g_syscall_code_routing_table[table_index];
/*
* ID
*/
res = val_to_ring(args, sc_code, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
if (args->event_type == PPME_GENERIC_E) {
/*
* nativeID
*/
res = val_to_ring(args, args->syscall_id, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
} else {
ASSERT(false);
res = val_to_ring(args, (unsigned long)"<out of bound>", 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
return add_sentinel(args);
}
static int f_sys_empty(struct event_filler_arguments *args)
{
return add_sentinel(args);
}
static int f_sys_single(struct event_filler_arguments *args)
{
int res;
unsigned long val;
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_single_x(struct event_filler_arguments *args)
{
int res;
int64_t retval;
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u32 open_flags_to_scap(unsigned long flags)
{
u32 res = 0;
switch (flags & (O_RDONLY | O_WRONLY | O_RDWR)) {
case O_WRONLY:
res |= PPM_O_WRONLY;
break;
case O_RDWR:
res |= PPM_O_RDWR;
break;
default:
res |= PPM_O_RDONLY;
break;
}
if (flags & O_CREAT)
res |= PPM_O_CREAT;
if (flags & O_APPEND)
res |= PPM_O_APPEND;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
if (flags & O_DSYNC)
res |= PPM_O_DSYNC;
#endif
if (flags & O_EXCL)
res |= PPM_O_EXCL;
if (flags & O_NONBLOCK)
res |= PPM_O_NONBLOCK;
if (flags & O_SYNC)
res |= PPM_O_SYNC;
if (flags & O_TRUNC)
res |= PPM_O_TRUNC;
if (flags & O_DIRECT)
res |= PPM_O_DIRECT;
if (flags & O_DIRECTORY)
res |= PPM_O_DIRECTORY;
if (flags & O_LARGEFILE)
res |= PPM_O_LARGEFILE;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
if (flags & O_CLOEXEC)
res |= PPM_O_CLOEXEC;
#endif
return res;
}
static inline u32 open_modes_to_scap(unsigned long modes)
{
u32 res = 0;
if (modes & S_IRUSR)
res |= PPM_S_IRUSR;
if (modes & S_IWUSR)
res |= PPM_S_IWUSR;
if (modes & S_IXUSR)
res |= PPM_S_IXUSR;
/*
* PPM_S_IRWXU == S_IRUSR | S_IWUSR | S_IXUSR
*/
if (modes & S_IRGRP)
res |= PPM_S_IRGRP;
if (modes & S_IWGRP)
res |= PPM_S_IWGRP;
if (modes & S_IXGRP)
res |= PPM_S_IXGRP;
/*
* PPM_S_IRWXG == S_IRGRP | S_IWGRP | S_IXGRP
*/
if (modes & S_IROTH)
res |= PPM_S_IROTH;
if (modes & S_IWOTH)
res |= PPM_S_IWOTH;
if (modes & S_IXOTH)
res |= PPM_S_IXOTH;
/*
* PPM_S_IRWXO == S_IROTH | S_IWOTH | S_IXOTH
*/
if (modes & S_ISUID)
res |= PPM_S_ISUID;
if (modes & S_ISGID)
res |= PPM_S_ISGID;
if (modes & S_ISVTX)
res |= PPM_S_ISVTX;
return res;
}
static inline int open_mode_to_ring(struct event_filler_arguments *args,
unsigned long flags,
unsigned int i)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)
unsigned long flags_mask = O_CREAT | O_TMPFILE;
#else
unsigned long flags_mask = O_CREAT;
#endif
int res;
if (flags & flags_mask) {
unsigned long val;
/*
* Mode
* Note that we convert them into the ppm portable
* representation before pushing them to the ring
*/
syscall_get_arguments(current, args->regs, i, 1, &val);
res = val_to_ring(args, open_modes_to_scap(val), 0, false, 0);
} else {
res = val_to_ring(args, 0, 0, false, 0);
}
return res;
}
static int f_sys_open_x(struct event_filler_arguments *args)
{
unsigned long val, flags;
int res;
int64_t retval;
/*
* fd
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* name
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Flags
* Note that we convert them into the ppm portable representation before pushing them to the ring
*/
syscall_get_arguments(current, args->regs, 1, 1, &flags);
res = val_to_ring(args, open_flags_to_scap(flags), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* mode
*/
res = open_mode_to_ring(args, flags, 2);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_read_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
unsigned long bufsize;
/*
* Retrieve the FD. It will be used for dynamic snaplen calculation.
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
args->fd = (int)val;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* data
*/
if (retval < 0) {
/*
* The operation failed, return an empty buffer
*/
val = 0;
bufsize = 0;
} else {
syscall_get_arguments(current, args->regs, 1, 1, &val);
/*
* The return value can be lower than the value provided by the user,
* and we take that into account.
*/
bufsize = retval;
}
/*
* Copy the buffer
*/
args->enforce_snaplen = true;
res = val_to_ring(args, val, bufsize, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_write_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
unsigned long bufsize;
/*
* Retrieve the FD. It will be used for dynamic snaplen calculation.
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
args->fd = (int)val;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* data
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
bufsize = val;
/*
* Copy the buffer
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
args->enforce_snaplen = true;
res = val_to_ring(args, val, bufsize, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u32 clone_flags_to_scap(unsigned long flags)
{
u32 res = 0;
if (flags & CLONE_FILES)
res |= PPM_CL_CLONE_FILES;
if (flags & CLONE_FS)
res |= PPM_CL_CLONE_FS;
#ifdef CLONE_IO
if (flags & CLONE_IO)
res |= PPM_CL_CLONE_IO;
#endif
#ifdef CLONE_NEWIPC
if (flags & CLONE_NEWIPC)
res |= PPM_CL_CLONE_NEWIPC;
#endif
#ifdef CLONE_NEWNET
if (flags & CLONE_NEWNET)
res |= PPM_CL_CLONE_NEWNET;
#endif
#ifdef CLONE_NEWNS
if (flags & CLONE_NEWNS)
res |= PPM_CL_CLONE_NEWNS;
#endif
#ifdef CLONE_NEWPID
if (flags & CLONE_NEWPID)
res |= PPM_CL_CLONE_NEWPID;
#endif
#ifdef CLONE_NEWUTS
if (flags & CLONE_NEWUTS)
res |= PPM_CL_CLONE_NEWUTS;
#endif
if (flags & CLONE_PARENT_SETTID)
res |= PPM_CL_CLONE_PARENT_SETTID;
if (flags & CLONE_PARENT)
res |= PPM_CL_CLONE_PARENT;
if (flags & CLONE_PTRACE)
res |= PPM_CL_CLONE_PTRACE;
if (flags & CLONE_SIGHAND)
res |= PPM_CL_CLONE_SIGHAND;
if (flags & CLONE_SYSVSEM)
res |= PPM_CL_CLONE_SYSVSEM;
if (flags & CLONE_THREAD)
res |= PPM_CL_CLONE_THREAD;
if (flags & CLONE_UNTRACED)
res |= PPM_CL_CLONE_UNTRACED;
if (flags & CLONE_VM)
res |= PPM_CL_CLONE_VM;
#ifdef CLONE_NEWUSER
if (flags & CLONE_NEWUSER)
res |= PPM_CL_CLONE_NEWUSER;
#endif
if (flags & CLONE_CHILD_CLEARTID)
res |= PPM_CL_CLONE_CHILD_CLEARTID;
if (flags & CLONE_CHILD_SETTID)
res |= PPM_CL_CLONE_CHILD_SETTID;
if (flags & CLONE_SETTLS)
res |= PPM_CL_CLONE_SETTLS;
#ifdef CLONE_STOPPED
if (flags & CLONE_STOPPED)
res |= PPM_CL_CLONE_STOPPED;
#endif
if (flags & CLONE_VFORK)
res |= PPM_CL_CLONE_VFORK;
#ifdef CLONE_NEWCGROUP
if (flags & CLONE_NEWCGROUP)
res |= PPM_CL_CLONE_NEWCGROUP;
#endif
return res;
}
/*
* get_mm_counter was not inline and exported between 3.0 and 3.4
* https://github.com/torvalds/linux/commit/69c978232aaa99476f9bd002c2a29a84fa3779b5
* Hence the crap in these two functions
*/
unsigned long ppm_get_mm_counter(struct mm_struct *mm, int member)
{
long val = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0)
val = get_mm_counter(mm, member);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 34)
val = atomic_long_read(&mm->rss_stat.count[member]);
if (val < 0)
val = 0;
#endif
return val;
}
static unsigned long ppm_get_mm_swap(struct mm_struct *mm)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 34)
return ppm_get_mm_counter(mm, MM_SWAPENTS);
#endif
return 0;
}
static unsigned long ppm_get_mm_rss(struct mm_struct *mm)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0)
return get_mm_rss(mm);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 34)
return ppm_get_mm_counter(mm, MM_FILEPAGES) +
ppm_get_mm_counter(mm, MM_ANONPAGES);
#else
return get_mm_rss(mm);
#endif
return 0;
}
#ifdef CONFIG_CGROUPS
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)
static int ppm_cgroup_path(const struct cgroup *cgrp, char *buf, int buflen)
{
char *start;
struct dentry *dentry = rcu_dereference(cgrp->dentry);
if (!dentry) {
/*
* Inactive subsystems have no dentry for their root
* cgroup
*/
strcpy(buf, "/");
return 0;
}
start = buf + buflen;
*--start = '\0';
for (;;) {
int len = dentry->d_name.len;
start -= len;
if (start < buf)
return -ENAMETOOLONG;
memcpy(start, cgrp->dentry->d_name.name, len);
cgrp = cgrp->parent;
if (!cgrp)
break;
dentry = rcu_dereference(cgrp->dentry);
if (!cgrp->parent)
continue;
if (--start < buf)
return -ENAMETOOLONG;
*start = '/';
}
memmove(buf, start, buf + buflen - start);
return 0;
}
#endif
static int append_cgroup(const char *subsys_name, int subsys_id, char *buf, int *available)
{
int pathlen;
int subsys_len;
char *path;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) || LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)
int res;
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0)
struct cgroup_subsys_state *css = task_css(current, subsys_id);
#else
struct cgroup_subsys_state *css = task_subsys_state(current, subsys_id);
#endif
if (!css) {
ASSERT(false);
return 1;
}
if (!css->cgroup) {
ASSERT(false);
return 1;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)
// According to https://github.com/torvalds/linux/commit/4c737b41de7f4eef2a593803bad1b918dd718b10
// cgroup_path now returns an int again
res = cgroup_path(css->cgroup, buf, *available);
if (res < 0) {
ASSERT(false);
path = "NA";
} else {
path = buf;
}
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0)
path = cgroup_path(css->cgroup, buf, *available);
if (!path) {
ASSERT(false);
path = "NA";
}
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 34)
res = cgroup_path(css->cgroup, buf, *available);
if (res < 0) {
ASSERT(false);
path = "NA";
} else {
path = buf;
}
#else
res = ppm_cgroup_path(css->cgroup, buf, *available);
if (res < 0) {
ASSERT(false);
path = "NA";
} else {
path = buf;
}
#endif
pathlen = strlen(path);
subsys_len = strlen(subsys_name);
if (subsys_len + 1 + pathlen + 1 > *available)
return 1;
memmove(buf + subsys_len + 1, path, pathlen);
memcpy(buf, subsys_name, subsys_len);
buf += subsys_len;
*buf++ = '=';
buf += pathlen;
*buf++ = 0;
*available -= (subsys_len + 1 + pathlen + 1);
return 0;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0)
#define SUBSYS(_x) \
if (append_cgroup(#_x, _x ## _cgrp_id, args->str_storage + STR_STORAGE_SIZE - available, &available)) \
goto cgroups_error;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
#define IS_SUBSYS_ENABLED(option) IS_BUILTIN(option)
#define SUBSYS(_x) \
if (append_cgroup(#_x, _x ## _subsys_id, args->str_storage + STR_STORAGE_SIZE - available, &available)) \
goto cgroups_error;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 7, 0)
#define IS_SUBSYS_ENABLED(option) IS_ENABLED(option)
#define SUBSYS(_x) \
if (append_cgroup(#_x, _x ## _subsys_id, args->str_storage + STR_STORAGE_SIZE - available, &available)) \
goto cgroups_error;
#else
#define SUBSYS(_x) \
if (append_cgroup(#_x, _x ## _subsys_id, args->str_storage + STR_STORAGE_SIZE - available, &available)) \
goto cgroups_error;
#endif
#endif
/* Takes in a NULL-terminated array of pointers to strings in userspace, and
* concatenates them to a single \0-separated string. Return the length of this
* string, or <0 on error */
static int accumulate_argv_or_env(const char __user * __user *argv,
char *str_storage,
int available)
{
int len = 0;
int n_bytes_copied;
if (argv == NULL)
return len;
for (;;) {
const char __user *p;
if (unlikely(ppm_get_user(p, argv)))
return PPM_FAILURE_INVALID_USER_MEMORY;
if (p == NULL)
break;
/* need at least enough space for a \0 */
if (available < 1)
return PPM_FAILURE_BUFFER_FULL;
n_bytes_copied = ppm_strncpy_from_user(&str_storage[len], p,
available);
/* ppm_strncpy_from_user includes the trailing \0 in its return
* count. I want to pretend it was strncpy_from_user() so I
* subtract off the 1 */
n_bytes_copied--;
if (n_bytes_copied < 0)
return PPM_FAILURE_INVALID_USER_MEMORY;
if (n_bytes_copied >= available)
return PPM_FAILURE_BUFFER_FULL;
/* update buffer. I want to keep the trailing \0, so I +1 */
available -= n_bytes_copied+1;
len += n_bytes_copied+1;
argv++;
}
return len;
}
#ifdef CONFIG_COMPAT
/* compat version that deals correctly with 32bits pointers of argv */
static int compat_accumulate_argv_or_env(compat_uptr_t argv,
char *str_storage,
int available)
{
int len = 0;
int n_bytes_copied;
if (compat_ptr(argv) == NULL)
return len;
for (;;) {
compat_uptr_t compat_p;
const char __user *p;
if (unlikely(ppm_get_user(compat_p, compat_ptr(argv))))
return PPM_FAILURE_INVALID_USER_MEMORY;
p = compat_ptr(compat_p);
if (p == NULL)
break;
/* need at least enough space for a \0 */
if (available < 1)
return PPM_FAILURE_BUFFER_FULL;
n_bytes_copied = ppm_strncpy_from_user(&str_storage[len], p,
available);
/* ppm_strncpy_from_user includes the trailing \0 in its return
* count. I want to pretend it was strncpy_from_user() so I
* subtract off the 1 */
n_bytes_copied--;
if (n_bytes_copied < 0) {
printk(pr_fmt("Error on copy here3"));
return PPM_FAILURE_INVALID_USER_MEMORY;
}
if (n_bytes_copied >= available)
return PPM_FAILURE_BUFFER_FULL;
/* update buffer. I want to keep the trailing \0, so I +1 */
available -= n_bytes_copied+1;
len += n_bytes_copied+1;
argv += sizeof(compat_uptr_t);
}
return len;
}
#endif
// probe_kernel_read() only added in kernel 2.6.26
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
long probe_kernel_read(void *dst, const void *src, size_t size)
{
long ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
pagefault_disable();
ret = __copy_from_user_inatomic(dst, (__force const void __user *)src, size);
pagefault_enable();
set_fs(old_fs);
return ret ? -EFAULT : 0;
}
#endif
static int ppm_get_tty(void)
{
/* Locking of the signal structures seems too complicated across
* multiple kernel versions to get it right, so simply do protected
* memory accesses, and in the worst case we get some garbage,
* which is not the end of the world. In the vast majority of accesses,
* we'll be just fine.
*/
struct signal_struct *sig;
struct tty_struct *tty;
struct tty_driver *driver;
int major;
int minor_start;
int index;
int tty_nr = 0;
sig = current->signal;
if (!sig)
return 0;
if (unlikely(probe_kernel_read(&tty, &sig->tty, sizeof(tty))))
return 0;
if (!tty)
return 0;
if (unlikely(probe_kernel_read(&index, &tty->index, sizeof(index))))
return 0;
if (unlikely(probe_kernel_read(&driver, &tty->driver, sizeof(driver))))
return 0;
if (!driver)
return 0;
if (unlikely(probe_kernel_read(&major, &driver->major, sizeof(major))))
return 0;
if (unlikely(probe_kernel_read(&minor_start, &driver->minor_start, sizeof(minor_start))))
return 0;
tty_nr = new_encode_dev(MKDEV(major, minor_start) + index);
return tty_nr;
}
static int f_proc_startupdate(struct event_filler_arguments *args)
{
unsigned long val;
int res = 0;
unsigned int exe_len = 0; /* the length of the executable string */
int args_len = 0; /*the combined length of the arguments string + executable string */
struct mm_struct *mm = current->mm;
int64_t retval;
int ptid;
char *spwd = "";
long total_vm = 0;
long total_rss = 0;
long swap = 0;
int available = STR_STORAGE_SIZE;
/*
* Make sure the operation was successful
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
if (unlikely(retval < 0 &&
args->event_type != PPME_SYSCALL_EXECVE_18_X)) {
/* The call failed, but this syscall has no exe, args
* anyway, so I report empty ones */
*args->str_storage = 0;
/*
* exe
*/
res = val_to_ring(args, (uint64_t)(long)args->str_storage, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Args
*/
res = val_to_ring(args, (int64_t)(long)args->str_storage, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
if (likely(retval >= 0)) {
/*
* The call suceeded. Get exe, args from the current
* process; put one \0-separated exe-args string into
* str_storage
*/
if (unlikely(!mm)) {
args->str_storage[0] = 0;
pr_info("f_proc_startupdate drop, mm=NULL\n");
return PPM_FAILURE_BUG;
}
if (unlikely(!mm->arg_end)) {
args->str_storage[0] = 0;
pr_info("f_proc_startupdate drop, mm->arg_end=NULL\n");
return PPM_FAILURE_BUG;
}
args_len = mm->arg_end - mm->arg_start;
if (args_len) {
if (args_len > PAGE_SIZE)
args_len = PAGE_SIZE;
if (unlikely(ppm_copy_from_user(args->str_storage, (const void __user *)mm->arg_start, args_len)))
args_len = 0;
else
args->str_storage[args_len - 1] = 0;
}
} else {
/*
* The execve call failed. I get exe, args from the
* input args; put one \0-separated exe-args string into
* str_storage
*/
args->str_storage[0] = 0;
syscall_get_arguments(current, args->regs, 1, 1, &val);
#ifdef CONFIG_COMPAT
if (unlikely(args->compat))
args_len = compat_accumulate_argv_or_env((compat_uptr_t)val,
args->str_storage, available);
else
#endif
args_len = accumulate_argv_or_env((const char __user * __user *)val,
args->str_storage, available);
if (unlikely(args_len < 0))
args_len = 0;
}
if (args_len == 0)
*args->str_storage = 0;
exe_len = strnlen(args->str_storage, args_len);
if (exe_len < args_len)
++exe_len;
/*
* exe
*/
res = val_to_ring(args, (uint64_t)(long)args->str_storage, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Args
*/
res = val_to_ring(args, (int64_t)(long)args->str_storage + exe_len, args_len - exe_len, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
/*
* tid
*/
res = val_to_ring(args, (int64_t)current->pid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pid
*/
res = val_to_ring(args, (int64_t)current->tgid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* ptid
*/
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
if (current->real_parent)
ptid = current->real_parent->pid;
#else
if (current->parent)
ptid = current->parent->pid;
#endif
else
ptid = 0;
res = val_to_ring(args, (int64_t)ptid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* cwd, pushed empty to avoid breaking compatibility
* with the older event format
*/
res = val_to_ring(args, (uint64_t)(long)spwd, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* fdlimit
*/
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
res = val_to_ring(args, (int64_t)rlimit(RLIMIT_NOFILE), 0, false, 0);
#else
res = val_to_ring(args, (int64_t)0, 0, false, 0);
#endif
if (res != PPM_SUCCESS)
return res;
/*
* pgft_maj
*/
res = val_to_ring(args, current->maj_flt, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pgft_min
*/
res = val_to_ring(args, current->min_flt, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
if (mm) {
total_vm = mm->total_vm << (PAGE_SHIFT-10);
total_rss = ppm_get_mm_rss(mm) << (PAGE_SHIFT-10);
swap = ppm_get_mm_swap(mm) << (PAGE_SHIFT-10);
}
/*
* vm_size
*/
res = val_to_ring(args, total_vm, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vm_rss
*/
res = val_to_ring(args, total_rss, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vm_swap
*/
res = val_to_ring(args, swap, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* comm
*/
res = val_to_ring(args, (uint64_t)current->comm, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* cgroups
*/
args->str_storage[0] = 0;
#ifdef CONFIG_CGROUPS
rcu_read_lock();
#include <linux/cgroup_subsys.h>
cgroups_error:
rcu_read_unlock();
#endif
res = val_to_ring(args, (int64_t)(long)args->str_storage, STR_STORAGE_SIZE - available, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
if (args->event_type == PPME_SYSCALL_CLONE_20_X ||
args->event_type == PPME_SYSCALL_FORK_20_X ||
args->event_type == PPME_SYSCALL_VFORK_20_X) {
/*
* clone-only parameters
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
uint64_t euid = from_kuid_munged(current_user_ns(), current_euid());
uint64_t egid = from_kgid_munged(current_user_ns(), current_egid());
#elif LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
uint64_t euid = current_euid();
uint64_t egid = current_egid();
#else
uint64_t euid = current->euid;
uint64_t egid = current->egid;
#endif
/*
* flags
*/
if (args->event_type == PPME_SYSCALL_CLONE_20_X)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = 0;
res = val_to_ring(args, (uint64_t)clone_flags_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* uid
*/
res = val_to_ring(args, euid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* gid
*/
res = val_to_ring(args, egid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vtid
*/
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
res = val_to_ring(args, task_pid_vnr(current), 0, false, 0);
#else
/* Not relevant in old kernels */
res = val_to_ring(args, 0, 0, false, 0);
#endif
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vpid
*/
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
res = val_to_ring(args, task_tgid_vnr(current), 0, false, 0);
#else
/* Not relevant in old kernels */
res = val_to_ring(args, 0, 0, false, 0);
#endif
if (unlikely(res != PPM_SUCCESS))
return res;
} else if (args->event_type == PPME_SYSCALL_EXECVE_18_X) {
/*
* execve-only parameters
*/
long env_len = 0;
int tty_nr = 0;
if (likely(retval >= 0)) {
/*
* Already checked for mm validity
*/
env_len = mm->env_end - mm->env_start;
if (env_len) {
if (env_len > PAGE_SIZE)
env_len = PAGE_SIZE;
if (unlikely(ppm_copy_from_user(args->str_storage, (const void __user *)mm->env_start, env_len)))
env_len = 0;
else
args->str_storage[env_len - 1] = 0;
}
} else {
/*
* The call failed, so get the env from the arguments
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
#ifdef CONFIG_COMPAT
if (unlikely(args->compat))
env_len = compat_accumulate_argv_or_env((compat_uptr_t)val,
args->str_storage, available);
else
#endif
env_len = accumulate_argv_or_env((const char __user * __user *)val,
args->str_storage, available);
if (unlikely(env_len < 0))
env_len = 0;
}
if (env_len == 0)
*args->str_storage = 0;
/*
* environ
*/
res = val_to_ring(args, (int64_t)(long)args->str_storage, env_len, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* tty
*/
tty_nr = ppm_get_tty();
res = val_to_ring(args, tty_nr, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
return add_sentinel(args);
}
static int f_sys_execve_e(struct event_filler_arguments *args)
{
int res;
unsigned long val;
/*
* filename
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (res == PPM_FAILURE_INVALID_USER_MEMORY)
res = val_to_ring(args, (unsigned long)"<NA>", 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_socket_bind_x(struct event_filler_arguments *args)
{
int res;
int64_t retval;
int err = 0;
u16 size = 0;
struct sockaddr __user *usrsockaddr;
unsigned long val;
struct sockaddr_storage address;
char *targetbuf = args->str_storage;
/*
* res
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
/*
* addr
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
usrsockaddr = (struct sockaddr __user *)val;
/*
* Get the address len
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 2, 1, &val);
else
val = args->socketcall_args[2];
if (usrsockaddr != NULL && val != 0) {
/*
* Copy the address
*/
err = addr_to_kernel(usrsockaddr, val, (struct sockaddr *)&address);
if (likely(err >= 0)) {
/*
* Convert the fd into socket endpoint information
*/
size = pack_addr((struct sockaddr *)&address,
val,
targetbuf,
STR_STORAGE_SIZE);
}
}
/*
* Copy the endpoint info into the ring
*/
res = val_to_ring(args,
(uint64_t)(unsigned long)targetbuf,
size,
false,
0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_connect_x(struct event_filler_arguments *args)
{
int res;
int64_t retval;
int err = 0;
int fd;
struct sockaddr __user *usrsockaddr;
u16 size = 0;
char *targetbuf = args->str_storage;
struct sockaddr_storage address;
unsigned long val;
/*
* Push the result
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
/*
* Retrieve the fd and push it to the ring.
* Note that, even if we are in the exit callback, the arguments are still
* in the stack, and therefore we can consume them.
*/
if (!args->is_socketcall) {
syscall_get_arguments(current, args->regs, 0, 1, &val);
fd = (int)val;
} else
fd = (int)args->socketcall_args[0];
if (fd >= 0) {
/*
* Get the address
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
usrsockaddr = (struct sockaddr __user *)val;
/*
* Get the address len
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 2, 1, &val);
else
val = args->socketcall_args[2];
if (usrsockaddr != NULL && val != 0) {
/*
* Copy the address
*/
err = addr_to_kernel(usrsockaddr, val, (struct sockaddr *)&address);
if (likely(err >= 0)) {
/*
* Convert the fd into socket endpoint information
*/
size = fd_to_socktuple(fd,
(struct sockaddr *)&address,
val,
true,
false,
targetbuf,
STR_STORAGE_SIZE);
}
}
}
/*
* Copy the endpoint info into the ring
*/
res = val_to_ring(args,
(uint64_t)(unsigned long)targetbuf,
size,
false,
0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_socketpair_x(struct event_filler_arguments *args)
{
int res;
int64_t retval;
unsigned long val;
int fds[2];
int err;
struct socket *sock;
struct unix_sock *us;
struct sock *speer;
/*
* retval
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* If the call was succesful, copy the FDs
*/
if (likely(retval >= 0)) {
/*
* fds
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 3, 1, &val);
else
val = args->socketcall_args[3];
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(fds, (const void __user *)val, sizeof(fds))))
return PPM_FAILURE_INVALID_USER_MEMORY;
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(fds, (const void __user *)compat_ptr(val), sizeof(fds))))
return PPM_FAILURE_INVALID_USER_MEMORY;
}
#endif
res = val_to_ring(args, fds[0], 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, fds[1], 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/* get socket source and peer address */
sock = sockfd_lookup(fds[0], &err);
if (likely(sock != NULL)) {
us = unix_sk(sock->sk);
speer = us->peer;
res = val_to_ring(args, (unsigned long)us, 0, false, 0);
if (unlikely(res != PPM_SUCCESS)) {
sockfd_put(sock);
return res;
}
res = val_to_ring(args, (unsigned long)speer, 0, false, 0);
if (unlikely(res != PPM_SUCCESS)) {
sockfd_put(sock);
return res;
}
sockfd_put(sock);
} else {
return err;
}
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
return add_sentinel(args);
}
static int f_sys_accept4_e(struct event_filler_arguments *args)
{
int res;
/*
* push the flags into the ring.
* XXX we don't support flags yet and so we just return zero
*/
/* res = val_to_ring(args, args->socketcall_args[3]); */
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_accept_x(struct event_filler_arguments *args)
{
int res;
int fd;
char *targetbuf = args->str_storage;
u16 size = 0;
unsigned long queuepct = 0;
unsigned long ack_backlog = 0;
unsigned long max_ack_backlog = 0;
unsigned long srvskfd;
int err = 0;
struct socket *sock;
/*
* Push the fd
*/
fd = syscall_get_return_value(current, args->regs);
res = val_to_ring(args, (int64_t)fd, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Convert the fd into socket endpoint information
*/
size = fd_to_socktuple(fd,
NULL,
0,
false,
true,
targetbuf,
STR_STORAGE_SIZE);
/*
* Copy the endpoint info into the ring
*/
res = val_to_ring(args,
(uint64_t)(unsigned long)targetbuf,
size,
false,
0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* queuepct
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &srvskfd);
else
srvskfd = args->socketcall_args[0];
sock = sockfd_lookup(srvskfd, &err);
if (sock && sock->sk) {
ack_backlog = sock->sk->sk_ack_backlog;
max_ack_backlog = sock->sk->sk_max_ack_backlog;
}
if (sock)
sockfd_put(sock);
if (max_ack_backlog)
queuepct = (unsigned long)ack_backlog * 100 / max_ack_backlog;
res = val_to_ring(args, queuepct, 0, false, 0);
if (res != PPM_SUCCESS)
return res;
res = val_to_ring(args, ack_backlog, 0, false, 0);
if (res != PPM_SUCCESS)
return res;
res = val_to_ring(args, max_ack_backlog, 0, false, 0);
if (res != PPM_SUCCESS)
return res;
return add_sentinel(args);
}
static int f_sys_send_e_common(struct event_filler_arguments *args, int *fd)
{
int res;
unsigned long size;
unsigned long val;
/*
* fd
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = args->socketcall_args[0];
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
*fd = val;
/*
* size
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 2, 1, &size);
else
size = args->socketcall_args[2];
res = val_to_ring(args, size, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return PPM_SUCCESS;
}
static int f_sys_send_e(struct event_filler_arguments *args)
{
int res;
int fd;
res = f_sys_send_e_common(args, &fd);
if (likely(res == PPM_SUCCESS))
return add_sentinel(args);
return res;
}
static int f_sys_sendto_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
u16 size = 0;
char *targetbuf = args->str_storage;
int fd;
struct sockaddr __user *usrsockaddr;
struct sockaddr_storage address;
int err = 0;
*targetbuf = 250;
/*
* Push the common params to the ring
*/
res = f_sys_send_e_common(args, &fd);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Get the address
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 4, 1, &val);
else
val = args->socketcall_args[4];
usrsockaddr = (struct sockaddr __user *)val;
/*
* Get the address len
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 5, 1, &val);
else
val = args->socketcall_args[5];
if (usrsockaddr != NULL && val != 0) {
/*
* Copy the address
*/
err = addr_to_kernel(usrsockaddr, val, (struct sockaddr *)&address);
if (likely(err >= 0)) {
/*
* Convert the fd into socket endpoint information
*/
size = fd_to_socktuple(fd,
(struct sockaddr *)&address,
val,
true,
false,
targetbuf,
STR_STORAGE_SIZE);
}
}
/*
* Copy the endpoint info into the ring
*/
res = val_to_ring(args,
(uint64_t)(unsigned long)targetbuf,
size,
false,
0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_send_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
unsigned long bufsize;
/*
* Retrieve the FD. It will be used for dynamic snaplen calculation.
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = args->socketcall_args[0];
args->fd = (int)val;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* data
*/
if (retval < 0) {
/*
* The operation failed, return an empty buffer
*/
val = 0;
bufsize = 0;
} else {
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
/*
* The return value can be lower than the value provided by the user,
* and we take that into account.
*/
bufsize = retval;
}
args->enforce_snaplen = true;
res = val_to_ring(args, val, bufsize, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_recv_e_common(struct event_filler_arguments *args)
{
int res;
unsigned long val;
/*
* fd
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = args->socketcall_args[0];
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* size
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 2, 1, &val);
else
val = args->socketcall_args[2];
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return PPM_SUCCESS;
}
static int f_sys_recv_e(struct event_filler_arguments *args)
{
int res;
res = f_sys_recv_e_common(args);
if (likely(res == PPM_SUCCESS))
return add_sentinel(args);
return res;
}
static int f_sys_recvfrom_e(struct event_filler_arguments *args)
{
int res;
res = f_sys_recv_e_common(args);
if (likely(res == PPM_SUCCESS))
return add_sentinel(args);
return res;
}
static int f_sys_recv_x_common(struct event_filler_arguments *args, int64_t *retval)
{
int res;
unsigned long val;
unsigned long bufsize;
/*
* Retrieve the FD. It will be used for dynamic snaplen calculation.
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = args->socketcall_args[1];
args->fd = (int)val;
/*
* res
*/
*retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, *retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* data
*/
if (*retval < 0) {
/*
* The operation failed, return an empty buffer
*/
val = 0;
bufsize = 0;
} else {
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
/*
* The return value can be lower than the value provided by the user,
* and we take that into account.
*/
bufsize = *retval;
}
args->enforce_snaplen = true;
res = val_to_ring(args, val, bufsize, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return PPM_SUCCESS;
}
static int f_sys_recv_x(struct event_filler_arguments *args)
{
int res;
int64_t retval;
res = f_sys_recv_x_common(args, &retval);
if (likely(res == PPM_SUCCESS))
return add_sentinel(args);
return res;
}
static int f_sys_recvfrom_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
u16 size = 0;
int64_t retval;
char *targetbuf = args->str_storage;
int fd;
struct sockaddr __user *usrsockaddr;
struct sockaddr_storage address;
int addrlen;
int err = 0;
/*
* Push the common params to the ring
*/
res = f_sys_recv_x_common(args, &retval);
if (unlikely(res != PPM_SUCCESS))
return res;
if (retval >= 0) {
/*
* Get the fd
*/
if (!args->is_socketcall) {
syscall_get_arguments(current, args->regs, 0, 1, &val);
fd = (int)val;
} else
fd = (int)args->socketcall_args[0];
/*
* Get the address
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 4, 1, &val);
else
val = args->socketcall_args[4];
usrsockaddr = (struct sockaddr __user *)val;
/*
* Get the address len
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 5, 1, &val);
else
val = args->socketcall_args[5];
if (usrsockaddr != NULL && val != 0) {
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(&addrlen, (const void __user *)val, sizeof(addrlen))))
return PPM_FAILURE_INVALID_USER_MEMORY;
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(&addrlen, (const void __user *)compat_ptr(val), sizeof(addrlen))))
return PPM_FAILURE_INVALID_USER_MEMORY;
}
#endif
/*
* Copy the address
*/
err = addr_to_kernel(usrsockaddr, addrlen, (struct sockaddr *)&address);
if (likely(err >= 0)) {
/*
* Convert the fd into socket endpoint information
*/
size = fd_to_socktuple(fd,
(struct sockaddr *)&address,
addrlen,
true,
true,
targetbuf,
STR_STORAGE_SIZE);
}
}
}
/*
* Copy the endpoint info into the ring
*/
res = val_to_ring(args,
(uint64_t)(unsigned long)targetbuf,
size,
false,
0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_sendmsg_e(struct event_filler_arguments *args)
{
int res;
unsigned long val;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)
struct user_msghdr mh;
#else
struct msghdr mh;
#endif
char *targetbuf = args->str_storage;
const struct iovec __user *iov;
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
struct compat_msghdr compat_mh;
#endif
unsigned long iovcnt;
int fd;
u16 size = 0;
int addrlen;
int err = 0;
struct sockaddr __user *usrsockaddr;
struct sockaddr_storage address;
/*
* fd
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = args->socketcall_args[0];
fd = val;
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Retrieve the message header
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(&mh, (const void __user *)val, sizeof(mh))))
return PPM_FAILURE_INVALID_USER_MEMORY;
/*
* size
*/
iov = (const struct iovec __user *)mh.msg_iov;
iovcnt = mh.msg_iovlen;
res = parse_readv_writev_bufs(args, iov, iovcnt, args->consumer->snaplen, PRB_FLAG_PUSH_SIZE | PRB_FLAG_IS_WRITE);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* tuple
*/
usrsockaddr = (struct sockaddr __user *)mh.msg_name;
addrlen = mh.msg_namelen;
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(&compat_mh, (const void __user *)compat_ptr(val), sizeof(compat_mh))))
return PPM_FAILURE_INVALID_USER_MEMORY;
/*
* size
*/
compat_iov = (const struct compat_iovec __user *)compat_ptr(compat_mh.msg_iov);
iovcnt = compat_mh.msg_iovlen;
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt, args->consumer->snaplen, PRB_FLAG_PUSH_SIZE | PRB_FLAG_IS_WRITE);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* tuple
*/
usrsockaddr = (struct sockaddr __user *)compat_ptr(compat_mh.msg_name);
addrlen = compat_mh.msg_namelen;
}
#endif
if (usrsockaddr != NULL && addrlen != 0) {
/*
* Copy the address
*/
err = addr_to_kernel(usrsockaddr, addrlen, (struct sockaddr *)&address);
if (likely(err >= 0)) {
/*
* Convert the fd into socket endpoint information
*/
size = fd_to_socktuple(fd,
(struct sockaddr *)&address,
addrlen,
true,
false,
targetbuf,
STR_STORAGE_SIZE);
}
}
/* Copy the endpoint info into the ring */
res = val_to_ring(args,
(uint64_t)(unsigned long)targetbuf,
size,
false,
0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_sendmsg_x(struct event_filler_arguments *args)
{
int res;
unsigned long val;
int64_t retval;
const struct iovec __user *iov;
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
struct compat_msghdr compat_mh;
#endif
unsigned long iovcnt;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)
struct user_msghdr mh;
#else
struct msghdr mh;
#endif
/*
* res
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Retrieve the message header
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
/*
* data
*/
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(&mh, (const void __user *)val, sizeof(mh))))
return PPM_FAILURE_INVALID_USER_MEMORY;
iov = (const struct iovec __user *)mh.msg_iov;
iovcnt = mh.msg_iovlen;
res = parse_readv_writev_bufs(args, iov, iovcnt, args->consumer->snaplen, PRB_FLAG_PUSH_DATA | PRB_FLAG_IS_WRITE);
if (unlikely(res != PPM_SUCCESS))
return res;
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(&compat_mh, (const void __user *)compat_ptr(val), sizeof(compat_mh))))
return PPM_FAILURE_INVALID_USER_MEMORY;
compat_iov = (const struct compat_iovec __user *)compat_ptr(compat_mh.msg_iov);
iovcnt = compat_mh.msg_iovlen;
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt, args->consumer->snaplen, PRB_FLAG_PUSH_DATA | PRB_FLAG_IS_WRITE);
if (unlikely(res != PPM_SUCCESS))
return res;
}
#endif
return add_sentinel(args);
}
static int f_sys_recvmsg_e(struct event_filler_arguments *args)
{
int res;
unsigned long val;
/*
* fd
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = args->socketcall_args[0];
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_recvmsg_x(struct event_filler_arguments *args)
{
int res;
unsigned long val;
int64_t retval;
const struct iovec __user *iov;
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
struct compat_msghdr compat_mh;
#endif
unsigned long iovcnt;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)
struct user_msghdr mh;
#else
struct msghdr mh;
#endif
char *targetbuf = args->str_storage;
int fd;
struct sockaddr __user *usrsockaddr;
struct sockaddr_storage address;
u16 size = 0;
int addrlen;
int err = 0;
/*
* res
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Retrieve the message header
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(&mh, (const void __user *)val, sizeof(mh))))
return PPM_FAILURE_INVALID_USER_MEMORY;
/*
* data and size
*/
iov = (const struct iovec __user *)mh.msg_iov;
iovcnt = mh.msg_iovlen;
res = parse_readv_writev_bufs(args, iov, iovcnt, retval, PRB_FLAG_PUSH_ALL);
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(&compat_mh, (const void __user *)compat_ptr(val), sizeof(compat_mh))))
return PPM_FAILURE_INVALID_USER_MEMORY;
/*
* data and size
*/
compat_iov = (const struct compat_iovec __user *)compat_ptr(compat_mh.msg_iov);
iovcnt = compat_mh.msg_iovlen;
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt, retval, PRB_FLAG_PUSH_ALL);
}
#endif
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* tuple
*/
if (retval >= 0) {
/*
* Get the fd
*/
if (!args->is_socketcall) {
syscall_get_arguments(current, args->regs, 0, 1, &val);
fd = (int)val;
} else
fd = (int)args->socketcall_args[0];
/*
* Get the address
*/
usrsockaddr = (struct sockaddr __user *)mh.msg_name;
addrlen = mh.msg_namelen;
if (usrsockaddr != NULL && addrlen != 0) {
/*
* Copy the address
*/
err = addr_to_kernel(usrsockaddr, addrlen, (struct sockaddr *)&address);
if (likely(err >= 0)) {
/*
* Convert the fd into socket endpoint information
*/
size = fd_to_socktuple(fd,
(struct sockaddr *)&address,
addrlen,
true,
true,
targetbuf,
STR_STORAGE_SIZE);
}
}
}
/* Copy the endpoint info into the ring */
res = val_to_ring(args,
(uint64_t)(unsigned long)targetbuf,
size,
false,
0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_pipe_x(struct event_filler_arguments *args)
{
int res;
int64_t retval;
unsigned long val;
int fds[2];
struct file *file;
/*
* retval
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* fds
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(fds, (const void __user *)val, sizeof(fds))))
return PPM_FAILURE_INVALID_USER_MEMORY;
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(fds, (const void __user *)compat_ptr(val), sizeof(fds))))
return PPM_FAILURE_INVALID_USER_MEMORY;
}
#endif
res = val_to_ring(args, fds[0], 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, fds[1], 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
file = fget(fds[0]);
val = 0;
if (likely(file != NULL)) {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
val = file->f_path.dentry->d_inode->i_ino;
#else
val = file->f_dentry->d_inode->i_ino;
#endif
fput(file);
}
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_eventfd_e(struct event_filler_arguments *args)
{
int res;
unsigned long val;
/*
* initval
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* flags
* XXX not implemented yet
*/
/* syscall_get_arguments(current, args->regs, 1, 1, &val); */
val = 0;
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u16 shutdown_how_to_scap(unsigned long how)
{
#ifdef SHUT_RD
if (how == SHUT_RD)
return PPM_SHUT_RD;
else if (how == SHUT_WR)
return SHUT_WR;
else if (how == SHUT_RDWR)
return SHUT_RDWR;
ASSERT(false);
#endif
return (u16)how;
}
static int f_sys_shutdown_e(struct event_filler_arguments *args)
{
int res;
unsigned long val;
/*
* fd
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 0, 1, &val);
else
val = args->socketcall_args[0];
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* how
*/
if (!args->is_socketcall)
syscall_get_arguments(current, args->regs, 1, 1, &val);
else
val = args->socketcall_args[1];
res = val_to_ring(args, (unsigned long)shutdown_how_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u16 futex_op_to_scap(unsigned long op)
{
u16 res = 0;
unsigned long flt_op = op & 127;
if (flt_op == FUTEX_WAIT)
res = PPM_FU_FUTEX_WAIT;
else if (flt_op == FUTEX_WAKE)
res = PPM_FU_FUTEX_WAKE;
else if (flt_op == FUTEX_FD)
res = PPM_FU_FUTEX_FD;
else if (flt_op == FUTEX_REQUEUE)
res = PPM_FU_FUTEX_REQUEUE;
else if (flt_op == FUTEX_CMP_REQUEUE)
res = PPM_FU_FUTEX_CMP_REQUEUE;
else if (flt_op == FUTEX_WAKE_OP)
res = PPM_FU_FUTEX_WAKE_OP;
else if (flt_op == FUTEX_LOCK_PI)
res = PPM_FU_FUTEX_LOCK_PI;
else if (flt_op == FUTEX_UNLOCK_PI)
res = PPM_FU_FUTEX_UNLOCK_PI;
else if (flt_op == FUTEX_TRYLOCK_PI)
res = PPM_FU_FUTEX_TRYLOCK_PI;
#ifdef FUTEX_WAIT_BITSET
else if (flt_op == FUTEX_WAIT_BITSET)
res = PPM_FU_FUTEX_WAIT_BITSET;
#endif
#ifdef FUTEX_WAKE_BITSET
else if (flt_op == FUTEX_WAKE_BITSET)
res = PPM_FU_FUTEX_WAKE_BITSET;
#endif
#ifdef FUTEX_WAIT_REQUEUE_PI
else if (flt_op == FUTEX_WAIT_REQUEUE_PI)
res = PPM_FU_FUTEX_WAIT_REQUEUE_PI;
#endif
#ifdef FUTEX_CMP_REQUEUE_PI
else if (flt_op == FUTEX_CMP_REQUEUE_PI)
res = PPM_FU_FUTEX_CMP_REQUEUE_PI;
#endif
if (op & FUTEX_PRIVATE_FLAG)
res |= PPM_FU_FUTEX_PRIVATE_FLAG;
#ifdef FUTEX_CLOCK_REALTIME
if (op & FUTEX_CLOCK_REALTIME)
res |= PPM_FU_FUTEX_CLOCK_REALTIME;
#endif
return res;
}
static int f_sys_futex_e(struct event_filler_arguments *args)
{
int res;
unsigned long val;
/*
* addr
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* op
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, (unsigned long)futex_op_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* val
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline uint64_t lseek_whence_to_scap(unsigned long whence)
{
uint64_t res = 0;
if (whence == SEEK_SET)
res = PPM_SEEK_SET;
else if (whence == SEEK_CUR)
res = PPM_SEEK_CUR;
else if (whence == SEEK_END)
res = PPM_SEEK_END;
return res;
}
static int f_sys_lseek_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* offset
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* whence
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
res = val_to_ring(args, lseek_whence_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_llseek_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
unsigned long oh;
unsigned long ol;
uint64_t offset;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* offset
* We build it by combining the offset_high and offset_low system call arguments
*/
syscall_get_arguments(current, args->regs, 1, 1, &oh);
syscall_get_arguments(current, args->regs, 2, 1, &ol);
offset = (((uint64_t)oh) << 32) + ((uint64_t)ol);
res = val_to_ring(args, offset, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* whence
*/
syscall_get_arguments(current, args->regs, 4, 1, &val);
res = val_to_ring(args, lseek_whence_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
/* XXX this is very basic for the moment, we'll need to improve it */
static inline u16 poll_events_to_scap(short revents)
{
u16 res = 0;
if (revents & POLLIN)
res |= PPM_POLLIN;
if (revents & PPM_POLLPRI)
res |= PPM_POLLPRI;
if (revents & POLLOUT)
res |= PPM_POLLOUT;
if (revents & POLLRDHUP)
res |= PPM_POLLRDHUP;
if (revents & POLLERR)
res |= PPM_POLLERR;
if (revents & POLLHUP)
res |= PPM_POLLHUP;
if (revents & POLLNVAL)
res |= PPM_POLLNVAL;
if (revents & POLLRDNORM)
res |= PPM_POLLRDNORM;
if (revents & POLLRDBAND)
res |= PPM_POLLRDBAND;
if (revents & POLLWRNORM)
res |= PPM_POLLWRNORM;
if (revents & POLLWRBAND)
res |= PPM_POLLWRBAND;
return res;
}
static int poll_parse_fds(struct event_filler_arguments *args, bool enter_event)
{
struct pollfd *fds;
char *targetbuf;
unsigned long val;
unsigned long nfds;
unsigned long fds_count;
u32 j;
u32 pos;
u16 flags;
/*
* fds
*
* Get the number of fds
*/
syscall_get_arguments(current, args->regs, 1, 1, &nfds);
/*
* Check if we have enough space to store both the fd list
* from user space and the temporary buffer to serialize to the ring
*/
if (unlikely(sizeof(struct pollfd) * nfds + 2 + 10 * nfds > STR_STORAGE_SIZE))
return PPM_FAILURE_BUFFER_FULL;
/* Get the fds pointer */
syscall_get_arguments(current, args->regs, 0, 1, &val);
fds = (struct pollfd *)args->str_storage;
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(fds, (const void __user *)val, nfds * sizeof(struct pollfd))))
return PPM_FAILURE_INVALID_USER_MEMORY;
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(fds, (const void __user *)compat_ptr(val), nfds * sizeof(struct pollfd))))
return PPM_FAILURE_INVALID_USER_MEMORY;
}
#endif
pos = 2;
targetbuf = args->str_storage + nfds * sizeof(struct pollfd) + pos;
fds_count = 0;
/* Copy each fd into the temporary buffer */
for (j = 0; j < nfds; j++) {
if (enter_event) {
flags = poll_events_to_scap(fds[j].events);
} else {
/*
* If it's an exit event, we copy only the fds that
* returned something
*/
if (!fds[j].revents)
continue;
flags = poll_events_to_scap(fds[j].revents);
}
*(int64_t *)(targetbuf + pos) = fds[j].fd;
*(int16_t *)(targetbuf + pos + 8) = flags;
pos += 10;
++fds_count;
}
*(u16 *)(targetbuf) = (u16)fds_count;
return val_to_ring(args, (uint64_t)(unsigned long)targetbuf, pos, false, 0);
}
static int f_sys_poll_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
res = poll_parse_fds(args, true);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* timeout
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int timespec_parse(struct event_filler_arguments *args, unsigned long val)
{
uint64_t longtime;
char *targetbuf = args->str_storage;
struct timespec *tts = (struct timespec *)targetbuf;
#ifdef CONFIG_COMPAT
struct compat_timespec *compat_tts = (struct compat_timespec *)targetbuf;
#endif
int cfulen;
/*
* interval
* We copy the timespec structure and then convert it to a 64bit relative time
*/
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
cfulen = (int)ppm_copy_from_user(targetbuf, (void __user *)val, sizeof(struct timespec));
if (unlikely(cfulen != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
longtime = ((uint64_t)tts->tv_sec) * 1000000000 + tts->tv_nsec;
#ifdef CONFIG_COMPAT
} else {
cfulen = (int)ppm_copy_from_user(targetbuf, (void __user *)compat_ptr(val), sizeof(struct compat_timespec));
if (unlikely(cfulen != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
longtime = ((uint64_t)compat_tts->tv_sec) * 1000000000 + compat_tts->tv_nsec;
}
#endif
return val_to_ring(args, longtime, 0, false, 0);
}
static int f_sys_ppoll_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
res = poll_parse_fds(args, true);
if (res != PPM_SUCCESS)
return res;
/*
* timeout
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
/* NULL timeout specified as 0xFFFFFF.... */
if (val == (unsigned long)NULL)
res = val_to_ring(args, (uint64_t)(-1), 0, false, 0);
else
res = timespec_parse(args, val);
if (res != PPM_SUCCESS)
return res;
/*
* sigmask
*/
syscall_get_arguments(current, args->regs, 3, 1, &val);
if (val != (unsigned long)NULL)
if (0 != ppm_copy_from_user(&val, (void __user *)val, sizeof(val)))
return PPM_FAILURE_INVALID_USER_MEMORY;
res = val_to_ring(args, val, 0, false, 0);
if (res != PPM_SUCCESS)
return res;
return add_sentinel(args);
}
/* This is the same for poll() and ppoll() */
static int f_sys_poll_x(struct event_filler_arguments *args)
{
int64_t retval;
int res;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = poll_parse_fds(args, false);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#define PPM_MS_MGC_MSK 0xffff0000
#define PPM_MS_MGC_VAL 0xC0ED0000
static int f_sys_mount_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* Fix mount flags in arg 3.
* See http://lxr.free-electrons.com/source/fs/namespace.c?v=4.2#L2650
*/
syscall_get_arguments(current, args->regs, 3, 1, &val);
if ((val & PPM_MS_MGC_MSK) == PPM_MS_MGC_VAL)
val &= ~PPM_MS_MGC_MSK;
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_openat_e(struct event_filler_arguments *args)
{
unsigned long val, flags;
int res;
/*
* dirfd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
if (val == AT_FDCWD)
val = PPM_AT_FDCWD;
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* name
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Flags
* Note that we convert them into the ppm portable representation before pushing them to the ring
*/
syscall_get_arguments(current, args->regs, 2, 1, &flags);
res = val_to_ring(args, open_flags_to_scap(flags), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* mode
*/
res = open_mode_to_ring(args, flags, 3);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#ifndef _64BIT_ARGS_SINGLE_REGISTER
static int f_sys_pread64_e(struct event_filler_arguments *args)
{
unsigned long val;
unsigned long size;
int res;
unsigned long pos0;
unsigned long pos1;
uint64_t pos64;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* size
*/
syscall_get_arguments(current, args->regs, 2, 1, &size);
res = val_to_ring(args, size, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pos
*/
#if defined CONFIG_X86
syscall_get_arguments(current, args->regs, 3, 1, &pos0);
syscall_get_arguments(current, args->regs, 4, 1, &pos1);
#elif defined CONFIG_ARM && CONFIG_AEABI
syscall_get_arguments(current, args->regs, 4, 1, &pos0);
syscall_get_arguments(current, args->regs, 5, 1, &pos1);
#else
#error This architecture/abi not yet supported
#endif
pos64 = merge_64(pos1, pos0);
res = val_to_ring(args, pos64, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#endif /* _64BIT_ARGS_SINGLE_REGISTER */
static int f_sys_pwrite64_e(struct event_filler_arguments *args)
{
unsigned long val;
unsigned long size;
int res;
#ifndef _64BIT_ARGS_SINGLE_REGISTER
unsigned long pos0;
unsigned long pos1;
uint64_t pos64;
#endif
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* size
*/
syscall_get_arguments(current, args->regs, 2, 1, &size);
res = val_to_ring(args, size, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pos
* NOTE: this is a 64bit value, which means that on 32bit systems it uses two
* separate registers that we need to merge.
*/
#ifdef _64BIT_ARGS_SINGLE_REGISTER
syscall_get_arguments(current, args->regs, 3, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
#else
#if defined CONFIG_X86
syscall_get_arguments(current, args->regs, 3, 1, &pos0);
syscall_get_arguments(current, args->regs, 4, 1, &pos1);
#elif defined CONFIG_ARM && CONFIG_AEABI
syscall_get_arguments(current, args->regs, 4, 1, &pos0);
syscall_get_arguments(current, args->regs, 5, 1, &pos1);
#else
#error This architecture/abi not yet supported
#endif
pos64 = merge_64(pos1, pos0);
res = val_to_ring(args, pos64, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
#endif
return add_sentinel(args);
}
static int f_sys_readv_x(struct event_filler_arguments *args)
{
unsigned long val;
int64_t retval;
int res;
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
#endif
const struct iovec __user *iov;
unsigned long iovcnt;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* data and size
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
syscall_get_arguments(current, args->regs, 2, 1, &iovcnt);
#ifdef CONFIG_COMPAT
if (unlikely(args->compat)) {
compat_iov = (const struct compat_iovec __user *)compat_ptr(val);
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt, retval, PRB_FLAG_PUSH_ALL);
} else
#endif
{
iov = (const struct iovec __user *)val;
res = parse_readv_writev_bufs(args, iov, iovcnt, retval, PRB_FLAG_PUSH_ALL);
}
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_writev_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
#endif
const struct iovec __user *iov;
unsigned long iovcnt;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* size
*/
syscall_get_arguments(current, args->regs, 2, 1, &iovcnt);
/*
* Copy the buffer
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
#ifdef CONFIG_COMPAT
if (unlikely(args->compat)) {
compat_iov = (const struct compat_iovec __user *)compat_ptr(val);
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt,
args->consumer->snaplen,
PRB_FLAG_PUSH_SIZE | PRB_FLAG_IS_WRITE);
} else
#endif
{
iov = (const struct iovec __user *)val;
res = parse_readv_writev_bufs(args, iov, iovcnt, args->consumer->snaplen,
PRB_FLAG_PUSH_SIZE | PRB_FLAG_IS_WRITE);
}
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_writev_pwritev_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
#endif
const struct iovec __user *iov;
unsigned long iovcnt;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* data and size
*/
syscall_get_arguments(current, args->regs, 2, 1, &iovcnt);
/*
* Copy the buffer
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
#ifdef CONFIG_COMPAT
if (unlikely(args->compat)) {
compat_iov = (const struct compat_iovec __user *)compat_ptr(val);
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt, args->consumer->snaplen, PRB_FLAG_PUSH_DATA | PRB_FLAG_IS_WRITE);
} else
#endif
{
iov = (const struct iovec __user *)val;
res = parse_readv_writev_bufs(args, iov, iovcnt, args->consumer->snaplen, PRB_FLAG_PUSH_DATA | PRB_FLAG_IS_WRITE);
}
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#ifndef _64BIT_ARGS_SINGLE_REGISTER
static int f_sys_preadv_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
unsigned long pos0;
unsigned long pos1;
uint64_t pos64;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pos
*/
/*
* Note that in preadv and pwritev have NO 64-bit arguments in the
* syscall (despite having one in the userspace API), so no alignment
* requirements apply here. For an overly-detailed discussion about
* this, see https://lwn.net/Articles/311630/
*/
syscall_get_arguments(current, args->regs, 3, 1, &pos0);
syscall_get_arguments(current, args->regs, 4, 1, &pos1);
pos64 = merge_64(pos1, pos0);
res = val_to_ring(args, pos64, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#endif /* _64BIT_ARGS_SINGLE_REGISTER */
static int f_sys_preadv_x(struct event_filler_arguments *args)
{
unsigned long val;
int64_t retval;
int res;
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
#endif
const struct iovec __user *iov;
unsigned long iovcnt;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* data and size
*/
syscall_get_arguments(current, args->regs, 2, 1, &iovcnt);
syscall_get_arguments(current, args->regs, 1, 1, &val);
#ifdef CONFIG_COMPAT
if (unlikely(args->compat)) {
compat_iov = (const struct compat_iovec __user *)compat_ptr(val);
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt, retval, PRB_FLAG_PUSH_ALL);
} else
#endif
{
iov = (const struct iovec __user *)val;
res = parse_readv_writev_bufs(args, iov, iovcnt, retval, PRB_FLAG_PUSH_ALL);
}
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_pwritev_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
#ifndef _64BIT_ARGS_SINGLE_REGISTER
unsigned long pos0;
unsigned long pos1;
uint64_t pos64;
#endif
#ifdef CONFIG_COMPAT
const struct compat_iovec __user *compat_iov;
#endif
const struct iovec __user *iov;
unsigned long iovcnt;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* size
*/
syscall_get_arguments(current, args->regs, 2, 1, &iovcnt);
/*
* Copy the buffer
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
#ifdef CONFIG_COMPAT
if (unlikely(args->compat)) {
compat_iov = (const struct compat_iovec __user *)compat_ptr(val);
res = compat_parse_readv_writev_bufs(args, compat_iov, iovcnt,
args->consumer->snaplen,
PRB_FLAG_PUSH_SIZE | PRB_FLAG_IS_WRITE);
} else
#endif
{
iov = (const struct iovec __user *)val;
res = parse_readv_writev_bufs(args, iov, iovcnt, args->consumer->snaplen,
PRB_FLAG_PUSH_SIZE | PRB_FLAG_IS_WRITE);
}
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pos
* NOTE: this is a 64bit value, which means that on 32bit systems it uses two
* separate registers that we need to merge.
*/
#ifdef _64BIT_ARGS_SINGLE_REGISTER
syscall_get_arguments(current, args->regs, 3, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
#else
/*
* Note that in preadv and pwritev have NO 64-bit arguments in the
* syscall (despite having one in the userspace API), so no alignment
* requirements apply here. For an overly-detailed discussion about
* this, see https://lwn.net/Articles/311630/
*/
syscall_get_arguments(current, args->regs, 3, 1, &pos0);
syscall_get_arguments(current, args->regs, 4, 1, &pos1);
pos64 = merge_64(pos1, pos0);
res = val_to_ring(args, pos64, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
#endif
return add_sentinel(args);
}
static int f_sys_nanosleep_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = timespec_parse(args, val);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u8 rlimit_resource_to_scap(unsigned long rresource)
{
switch (rresource) {
case RLIMIT_CPU:
return PPM_RLIMIT_CPU;
case RLIMIT_FSIZE:
return PPM_RLIMIT_FSIZE;
case RLIMIT_DATA:
return PPM_RLIMIT_DATA;
case RLIMIT_STACK:
return PPM_RLIMIT_STACK;
case RLIMIT_CORE:
return PPM_RLIMIT_CORE;
case RLIMIT_RSS:
return PPM_RLIMIT_RSS;
case RLIMIT_NPROC:
return PPM_RLIMIT_NPROC;
case RLIMIT_NOFILE:
return PPM_RLIMIT_NOFILE;
case RLIMIT_MEMLOCK:
return PPM_RLIMIT_MEMLOCK;
case RLIMIT_AS:
return PPM_RLIMIT_AS;
case RLIMIT_LOCKS:
return PPM_RLIMIT_LOCKS;
case RLIMIT_SIGPENDING:
return PPM_RLIMIT_SIGPENDING;
case RLIMIT_MSGQUEUE:
return PPM_RLIMIT_MSGQUEUE;
case RLIMIT_NICE:
return PPM_RLIMIT_NICE;
case RLIMIT_RTPRIO:
return PPM_RLIMIT_RTPRIO;
#ifdef RLIMIT_RTTIME
case RLIMIT_RTTIME:
return PPM_RLIMIT_RTTIME;
#endif
default:
return PPM_RLIMIT_UNKNOWN;
}
}
static int f_sys_getrlimit_setrlimit_e(struct event_filler_arguments *args)
{
u8 ppm_resource;
unsigned long val;
int res;
/*
* resource
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
ppm_resource = rlimit_resource_to_scap(val);
res = val_to_ring(args, (uint64_t)ppm_resource, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_getrlimit_setrlrimit_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
struct rlimit rl;
#ifdef CONFIG_COMPAT
struct compat_rlimit compat_rl;
#endif
int64_t cur;
int64_t max;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Copy the user structure and extract cur and max
*/
if (retval >= 0 || args->event_type == PPME_SYSCALL_SETRLIMIT_X) {
syscall_get_arguments(current, args->regs, 1, 1, &val);
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(&rl, (const void __user *)val, sizeof(struct rlimit))))
return PPM_FAILURE_INVALID_USER_MEMORY;
cur = rl.rlim_cur;
max = rl.rlim_max;
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(&compat_rl, (const void __user *)compat_ptr(val), sizeof(struct compat_rlimit))))
return PPM_FAILURE_INVALID_USER_MEMORY;
cur = compat_rl.rlim_cur;
max = compat_rl.rlim_max;
}
#endif
} else {
cur = -1;
max = -1;
}
/*
* cur
*/
res = val_to_ring(args, cur, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* max
*/
res = val_to_ring(args, max, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_prlimit_e(struct event_filler_arguments *args)
{
u8 ppm_resource;
unsigned long val;
int res;
/*
* pid
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* resource
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
ppm_resource = rlimit_resource_to_scap(val);
res = val_to_ring(args, (uint64_t)ppm_resource, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_prlimit_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
struct rlimit rl;
#ifdef CONFIG_COMPAT
struct compat_rlimit compat_rl;
#endif
int64_t newcur;
int64_t newmax;
int64_t oldcur;
int64_t oldmax;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Copy the user structure and extract cur and max
*/
if (retval >= 0) {
syscall_get_arguments(current, args->regs, 2, 1, &val);
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(&rl, (const void __user *)val, sizeof(struct rlimit)))) {
newcur = -1;
newmax = -1;
} else {
newcur = rl.rlim_cur;
newmax = rl.rlim_max;
}
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(&compat_rl, (const void __user *)val, sizeof(struct compat_rlimit)))) {
newcur = -1;
newmax = -1;
} else {
newcur = compat_rl.rlim_cur;
newmax = compat_rl.rlim_max;
}
}
#endif
} else {
newcur = -1;
newmax = -1;
}
syscall_get_arguments(current, args->regs, 3, 1, &val);
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
if (unlikely(ppm_copy_from_user(&rl, (const void __user *)val, sizeof(struct rlimit)))) {
oldcur = -1;
oldmax = -1;
} else {
oldcur = rl.rlim_cur;
oldmax = rl.rlim_max;
}
#ifdef CONFIG_COMPAT
} else {
if (unlikely(ppm_copy_from_user(&compat_rl, (const void __user *)val, sizeof(struct compat_rlimit)))) {
oldcur = -1;
oldmax = -1;
} else {
oldcur = compat_rl.rlim_cur;
oldmax = compat_rl.rlim_max;
}
}
#endif
/*
* newcur
*/
res = val_to_ring(args, newcur, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* newmax
*/
res = val_to_ring(args, newmax, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* oldcur
*/
res = val_to_ring(args, oldcur, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* oldmax
*/
res = val_to_ring(args, oldmax, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#ifdef CAPTURE_CONTEXT_SWITCHES
static int f_sched_switch_e(struct event_filler_arguments *args)
{
int res;
long total_vm = 0;
long total_rss = 0;
long swap = 0;
struct mm_struct *mm = NULL;
if (args->sched_prev == NULL || args->sched_next == NULL) {
ASSERT(false);
return -1;
}
/*
* next
*/
res = val_to_ring(args, args->sched_next->pid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pgft_maj
*/
res = val_to_ring(args, args->sched_prev->maj_flt, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pgft_min
*/
res = val_to_ring(args, args->sched_prev->min_flt, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
mm = args->sched_prev->mm;
if (mm) {
total_vm = mm->total_vm << (PAGE_SHIFT-10);
total_rss = ppm_get_mm_rss(mm) << (PAGE_SHIFT-10);
swap = ppm_get_mm_swap(mm) << (PAGE_SHIFT-10);
}
/*
* vm_size
*/
res = val_to_ring(args, total_vm, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vm_rss
*/
res = val_to_ring(args, total_rss, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vm_swap
*/
res = val_to_ring(args, swap, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
#if 0
/*
* steal
*/
steal = cputime64_to_clock_t(kcpustat_this_cpu->cpustat[CPUTIME_STEAL]);
res = val_to_ring(args, steal, 0, false);
if (unlikely(res != PPM_SUCCESS))
return res;
#endif
return add_sentinel(args);
}
#endif /* CAPTURE_CONTEXT_SWITCHES */
static int f_sched_drop(struct event_filler_arguments *args)
{
int res;
/*
* next
*/
res = val_to_ring(args, args->consumer->sampling_ratio, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u8 fcntl_cmd_to_scap(unsigned long cmd)
{
switch (cmd) {
case F_DUPFD:
return PPM_FCNTL_F_DUPFD;
case F_GETFD:
return PPM_FCNTL_F_GETFD;
case F_SETFD:
return PPM_FCNTL_F_SETFD;
case F_GETFL:
return PPM_FCNTL_F_GETFL;
case F_SETFL:
return PPM_FCNTL_F_SETFL;
case F_GETLK:
return PPM_FCNTL_F_GETLK;
case F_SETLK:
return PPM_FCNTL_F_SETLK;
case F_SETLKW:
return PPM_FCNTL_F_SETLKW;
case F_SETOWN:
return PPM_FCNTL_F_SETOWN;
case F_GETOWN:
return PPM_FCNTL_F_GETOWN;
case F_SETSIG:
return PPM_FCNTL_F_SETSIG;
case F_GETSIG:
return PPM_FCNTL_F_GETSIG;
#ifndef CONFIG_64BIT
case F_GETLK64:
return PPM_FCNTL_F_GETLK64;
case F_SETLK64:
return PPM_FCNTL_F_SETLK64;
case F_SETLKW64:
return PPM_FCNTL_F_SETLKW64;
#endif
#ifdef F_SETOWN_EX
case F_SETOWN_EX:
return PPM_FCNTL_F_SETOWN_EX;
#endif
#ifdef F_GETOWN_EX
case F_GETOWN_EX:
return PPM_FCNTL_F_GETOWN_EX;
#endif
case F_SETLEASE:
return PPM_FCNTL_F_SETLEASE;
case F_GETLEASE:
return PPM_FCNTL_F_GETLEASE;
case F_CANCELLK:
return PPM_FCNTL_F_CANCELLK;
#ifdef F_DUPFD_CLOEXEC
case F_DUPFD_CLOEXEC:
return PPM_FCNTL_F_DUPFD_CLOEXEC;
#endif
case F_NOTIFY:
return PPM_FCNTL_F_NOTIFY;
#ifdef F_SETPIPE_SZ
case F_SETPIPE_SZ:
return PPM_FCNTL_F_SETPIPE_SZ;
#endif
#ifdef F_GETPIPE_SZ
case F_GETPIPE_SZ:
return PPM_FCNTL_F_GETPIPE_SZ;
#endif
#ifdef F_OFD_GETLK
case F_OFD_GETLK:
return PPM_FCNTL_F_OFD_GETLK;
#endif
#ifdef F_OFD_SETLK
case F_OFD_SETLK:
return PPM_FCNTL_F_OFD_SETLK;
#endif
#ifdef F_OFD_SETLKW
case F_OFD_SETLKW:
return PPM_FCNTL_F_OFD_SETLKW;
#endif
default:
ASSERT(false);
return PPM_FCNTL_UNKNOWN;
}
}
static int f_sched_fcntl_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* cmd
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, fcntl_cmd_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u16 ptrace_requests_to_scap(unsigned long req)
{
switch (req) {
#ifdef PTRACE_SINGLEBLOCK
case PTRACE_SINGLEBLOCK:
return PPM_PTRACE_SINGLEBLOCK;
#endif
#ifdef PTRACE_SYSEMU_SINGLESTEP
case PTRACE_SYSEMU_SINGLESTEP:
return PPM_PTRACE_SYSEMU_SINGLESTEP;
#endif
#ifdef PTRACE_SYSEMU
case PTRACE_SYSEMU:
return PPM_PTRACE_SYSEMU;
#endif
#ifdef PTRACE_ARCH_PRCTL
case PTRACE_ARCH_PRCTL:
return PPM_PTRACE_ARCH_PRCTL;
#endif
#ifdef PTRACE_SET_THREAD_AREA
case PTRACE_SET_THREAD_AREA:
return PPM_PTRACE_SET_THREAD_AREA;
#endif
#ifdef PTRACE_GET_THREAD_AREA
case PTRACE_GET_THREAD_AREA:
return PPM_PTRACE_GET_THREAD_AREA;
#endif
#ifdef PTRACE_OLDSETOPTIONS
case PTRACE_OLDSETOPTIONS:
return PPM_PTRACE_OLDSETOPTIONS;
#endif
#ifdef PTRACE_SETFPXREGS
case PTRACE_SETFPXREGS:
return PPM_PTRACE_SETFPXREGS;
#endif
#ifdef PTRACE_GETFPXREGS
case PTRACE_GETFPXREGS:
return PPM_PTRACE_GETFPXREGS;
#endif
#ifdef PTRACE_SETFPREGS
case PTRACE_SETFPREGS:
return PPM_PTRACE_SETFPREGS;
#endif
#ifdef PTRACE_GETFPREGS
case PTRACE_GETFPREGS:
return PPM_PTRACE_GETFPREGS;
#endif
#ifdef PTRACE_SETREGS
case PTRACE_SETREGS:
return PPM_PTRACE_SETREGS;
#endif
#ifdef PTRACE_GETREGS
case PTRACE_GETREGS:
return PPM_PTRACE_GETREGS;
#endif
#ifdef PTRACE_SETSIGMASK
case PTRACE_SETSIGMASK:
return PPM_PTRACE_SETSIGMASK;
#endif
#ifdef PTRACE_GETSIGMASK
case PTRACE_GETSIGMASK:
return PPM_PTRACE_GETSIGMASK;
#endif
#ifdef PTRACE_PEEKSIGINFO
case PTRACE_PEEKSIGINFO:
return PPM_PTRACE_PEEKSIGINFO;
#endif
#ifdef PTRACE_LISTEN
case PTRACE_LISTEN:
return PPM_PTRACE_LISTEN;
#endif
#ifdef PTRACE_INTERRUPT
case PTRACE_INTERRUPT:
return PPM_PTRACE_INTERRUPT;
#endif
#ifdef PTRACE_SEIZE
case PTRACE_SEIZE:
return PPM_PTRACE_SEIZE;
#endif
#ifdef PTRACE_SETREGSET
case PTRACE_SETREGSET:
return PPM_PTRACE_SETREGSET;
#endif
#ifdef PTRACE_GETREGSET
case PTRACE_GETREGSET:
return PPM_PTRACE_GETREGSET;
#endif
case PTRACE_SETSIGINFO:
return PPM_PTRACE_SETSIGINFO;
case PTRACE_GETSIGINFO:
return PPM_PTRACE_GETSIGINFO;
case PTRACE_GETEVENTMSG:
return PPM_PTRACE_GETEVENTMSG;
case PTRACE_SETOPTIONS:
return PPM_PTRACE_SETOPTIONS;
case PTRACE_SYSCALL:
return PPM_PTRACE_SYSCALL;
case PTRACE_DETACH:
return PPM_PTRACE_DETACH;
case PTRACE_ATTACH:
return PPM_PTRACE_ATTACH;
case PTRACE_SINGLESTEP:
return PPM_PTRACE_SINGLESTEP;
case PTRACE_KILL:
return PPM_PTRACE_KILL;
case PTRACE_CONT:
return PPM_PTRACE_CONT;
case PTRACE_POKEUSR:
return PPM_PTRACE_POKEUSR;
case PTRACE_POKEDATA:
return PPM_PTRACE_POKEDATA;
case PTRACE_POKETEXT:
return PPM_PTRACE_POKETEXT;
case PTRACE_PEEKUSR:
return PPM_PTRACE_PEEKUSR;
case PTRACE_PEEKDATA:
return PPM_PTRACE_PEEKDATA;
case PTRACE_PEEKTEXT:
return PPM_PTRACE_PEEKTEXT;
case PTRACE_TRACEME:
return PPM_PTRACE_TRACEME;
default:
return PPM_PTRACE_UNKNOWN;
}
}
static inline int parse_ptrace_addr(struct event_filler_arguments *args, u16 request)
{
unsigned long val;
uint64_t dst;
u8 idx;
syscall_get_arguments(current, args->regs, 2, 1, &val);
switch (request) {
default:
idx = PPM_PTRACE_IDX_UINT64;
dst = (uint64_t)val;
}
return val_to_ring(args, dst, 0, false, idx);
}
static inline int parse_ptrace_data(struct event_filler_arguments *args, u16 request)
{
unsigned long val;
unsigned long len;
uint64_t dst;
u8 idx;
syscall_get_arguments(current, args->regs, 3, 1, &val);
switch (request) {
case PPM_PTRACE_PEEKTEXT:
case PPM_PTRACE_PEEKDATA:
case PPM_PTRACE_PEEKUSR:
idx = PPM_PTRACE_IDX_UINT64;
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
len = ppm_copy_from_user(&dst, (const void __user *)val, sizeof(long));
#ifdef CONFIG_COMPAT
} else {
len = ppm_copy_from_user(&dst, (const void __user *)compat_ptr(val), sizeof(compat_long_t));
}
#endif
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
break;
case PPM_PTRACE_CONT:
case PPM_PTRACE_SINGLESTEP:
case PPM_PTRACE_DETACH:
case PPM_PTRACE_SYSCALL:
idx = PPM_PTRACE_IDX_SIGTYPE;
dst = (uint64_t)val;
break;
case PPM_PTRACE_ATTACH:
case PPM_PTRACE_TRACEME:
case PPM_PTRACE_POKETEXT:
case PPM_PTRACE_POKEDATA:
case PPM_PTRACE_POKEUSR:
default:
idx = PPM_PTRACE_IDX_UINT64;
dst = (uint64_t)val;
break;
}
return val_to_ring(args, dst, 0, false, idx);
}
static int f_sys_ptrace_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* request
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, ptrace_requests_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pid
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_ptrace_x(struct event_filler_arguments *args)
{
unsigned long val;
int64_t retval;
u16 request;
int res;
/*
* res
*/
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
if (retval < 0) {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
/*
* request
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
request = ptrace_requests_to_scap(val);
res = parse_ptrace_addr(args, request);
if (unlikely(res != PPM_SUCCESS))
return res;
res = parse_ptrace_data(args, request);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_brk_munmap_mmap_x(struct event_filler_arguments *args)
{
int64_t retval;
int res = 0;
struct mm_struct *mm = current->mm;
long total_vm = 0;
long total_rss = 0;
long swap = 0;
retval = (int64_t)(long)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
if (mm) {
total_vm = mm->total_vm << (PAGE_SHIFT-10);
total_rss = ppm_get_mm_rss(mm) << (PAGE_SHIFT-10);
swap = ppm_get_mm_swap(mm) << (PAGE_SHIFT-10);
}
/*
* vm_size
*/
res = val_to_ring(args, total_vm, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vm_rss
*/
res = val_to_ring(args, total_rss, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* vm_swap
*/
res = val_to_ring(args, swap, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static u32 prot_flags_to_scap(int prot)
{
u32 res = 0;
if (prot & PROT_READ)
res |= PPM_PROT_READ;
if (prot & PROT_WRITE)
res |= PPM_PROT_WRITE;
if (prot & PROT_EXEC)
res |= PPM_PROT_EXEC;
if (prot & PROT_SEM)
res |= PPM_PROT_SEM;
if (prot & PROT_GROWSDOWN)
res |= PPM_PROT_GROWSDOWN;
if (prot & PROT_GROWSUP)
res |= PPM_PROT_GROWSUP;
#ifdef PROT_SAO
if (prot & PROT_SAO)
res |= PPM_PROT_SAO;
#endif
return res;
}
static u32 mmap_flags_to_scap(int flags)
{
u32 res = 0;
if (flags & MAP_SHARED)
res |= PPM_MAP_SHARED;
if (flags & MAP_PRIVATE)
res |= PPM_MAP_PRIVATE;
if (flags & MAP_FIXED)
res |= PPM_MAP_FIXED;
if (flags & MAP_ANONYMOUS)
res |= PPM_MAP_ANONYMOUS;
#ifdef MAP_32BIT
if (flags & MAP_32BIT)
res |= PPM_MAP_32BIT;
#endif
#ifdef MAP_RENAME
if (flags & MAP_RENAME)
res |= PPM_MAP_RENAME;
#endif
if (flags & MAP_NORESERVE)
res |= PPM_MAP_NORESERVE;
if (flags & MAP_POPULATE)
res |= PPM_MAP_POPULATE;
if (flags & MAP_NONBLOCK)
res |= PPM_MAP_NONBLOCK;
if (flags & MAP_GROWSDOWN)
res |= PPM_MAP_GROWSDOWN;
if (flags & MAP_DENYWRITE)
res |= PPM_MAP_DENYWRITE;
if (flags & MAP_EXECUTABLE)
res |= PPM_MAP_EXECUTABLE;
#ifdef MAP_INHERIT
if (flags & MAP_INHERIT)
res |= PPM_MAP_INHERIT;
#endif
if (flags & MAP_FILE)
res |= PPM_MAP_FILE;
if (flags & MAP_LOCKED)
res |= PPM_MAP_LOCKED;
return res;
}
static int f_sys_mmap_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* addr
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* length
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* prot
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
res = val_to_ring(args, prot_flags_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* flags
*/
syscall_get_arguments(current, args->regs, 3, 1, &val);
res = val_to_ring(args, mmap_flags_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* fd
*/
syscall_get_arguments(current, args->regs, 4, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* offset/pgoffset
*/
syscall_get_arguments(current, args->regs, 5, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_renameat_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* olddirfd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
if (val == AT_FDCWD)
val = PPM_AT_FDCWD;
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* oldpath
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* newdirfd
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
if (val == AT_FDCWD)
val = PPM_AT_FDCWD;
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* newpath
*/
syscall_get_arguments(current, args->regs, 3, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_symlinkat_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* oldpath
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* newdirfd
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
if (val == AT_FDCWD)
val = PPM_AT_FDCWD;
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* newpath
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_procexit_e(struct event_filler_arguments *args)
{
int res;
if (args->sched_prev == NULL) {
ASSERT(false);
return -1;
}
/*
* status
*/
res = val_to_ring(args, args->sched_prev->exit_code, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_sendfile_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
off_t offset;
/*
* out_fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* in_fd
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* offset
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
if (val != 0) {
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
res = ppm_copy_from_user(&offset, (void *)val, sizeof(off_t));
#ifdef CONFIG_COMPAT
} else {
res = ppm_copy_from_user(&offset, (void *)compat_ptr(val), sizeof(compat_off_t));
}
#endif
if (unlikely(res))
val = 0;
else
val = offset;
}
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* size
*/
syscall_get_arguments(current, args->regs, 3, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_sendfile_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
off_t offset;
/*
* res
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* offset
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
if (val != 0) {
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
res = ppm_copy_from_user(&offset, (void *)val, sizeof(off_t));
#ifdef CONFIG_COMPAT
} else {
res = ppm_copy_from_user(&offset, (void *)compat_ptr(val), sizeof(compat_off_t));
}
#endif
if (unlikely(res))
val = 0;
else
val = offset;
}
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline uint8_t quotactl_type_to_scap(unsigned long cmd)
{
switch (cmd & SUBCMDMASK) {
case USRQUOTA:
return PPM_USRQUOTA;
case GRPQUOTA:
return PPM_GRPQUOTA;
}
return 0;
}
static inline uint16_t quotactl_cmd_to_scap(unsigned long cmd)
{
uint16_t res;
switch (cmd >> SUBCMDSHIFT) {
case Q_SYNC:
res = PPM_Q_SYNC;
break;
case Q_QUOTAON:
res = PPM_Q_QUOTAON;
break;
case Q_QUOTAOFF:
res = PPM_Q_QUOTAOFF;
break;
case Q_GETFMT:
res = PPM_Q_GETFMT;
break;
case Q_GETINFO:
res = PPM_Q_GETINFO;
break;
case Q_SETINFO:
res = PPM_Q_SETINFO;
break;
case Q_GETQUOTA:
res = PPM_Q_GETQUOTA;
break;
case Q_SETQUOTA:
res = PPM_Q_SETQUOTA;
break;
/*
* XFS specific
*/
case Q_XQUOTAON:
res = PPM_Q_XQUOTAON;
break;
case Q_XQUOTAOFF:
res = PPM_Q_XQUOTAOFF;
break;
case Q_XGETQUOTA:
res = PPM_Q_XGETQUOTA;
break;
case Q_XSETQLIM:
res = PPM_Q_XSETQLIM;
break;
case Q_XGETQSTAT:
res = PPM_Q_XGETQSTAT;
break;
case Q_XQUOTARM:
res = PPM_Q_XQUOTARM;
break;
case Q_XQUOTASYNC:
res = PPM_Q_XQUOTASYNC;
break;
default:
res = 0;
}
return res;
}
static inline uint8_t quotactl_fmt_to_scap(unsigned long fmt)
{
switch (fmt) {
case QFMT_VFS_OLD:
return PPM_QFMT_VFS_OLD;
case QFMT_VFS_V0:
return PPM_QFMT_VFS_V0;
#ifdef QFMT_VFS_V1
case QFMT_VFS_V1:
return PPM_QFMT_VFS_V1;
#endif
default:
return PPM_QFMT_NOT_USED;
}
}
static int f_sys_quotactl_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
uint32_t id;
uint8_t quota_fmt;
uint16_t cmd;
/*
* extract cmd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
cmd = quotactl_cmd_to_scap(val);
res = val_to_ring(args, cmd, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* extract type
*/
res = val_to_ring(args, quotactl_type_to_scap(val), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* extract id
*/
id = 0;
syscall_get_arguments(current, args->regs, 2, 1, &val);
if ((cmd == PPM_Q_GETQUOTA) ||
(cmd == PPM_Q_SETQUOTA) ||
(cmd == PPM_Q_XGETQUOTA) ||
(cmd == PPM_Q_XSETQLIM)) {
/*
* in this case id represent an userid or groupid so add it
*/
id = val;
}
res = val_to_ring(args, id, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* extract quota_fmt from id
*/
quota_fmt = PPM_QFMT_NOT_USED;
if (cmd == PPM_Q_QUOTAON)
quota_fmt = quotactl_fmt_to_scap(val);
res = val_to_ring(args, quota_fmt, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_quotactl_x(struct event_filler_arguments *args)
{
unsigned long val, len;
int res;
int64_t retval;
uint16_t cmd;
struct if_dqblk dqblk;
struct if_dqinfo dqinfo;
uint32_t quota_fmt_out;
const char empty_string[] = "";
/*
* extract cmd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
cmd = quotactl_cmd_to_scap(val);
/*
* return value
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* Add special
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* get addr
*/
syscall_get_arguments(current, args->regs, 3, 1, &val);
/*
* get quotafilepath only for QUOTAON
*/
if (cmd == PPM_Q_QUOTAON)
res = val_to_ring(args, val, 0, true, 0);
else
res = val_to_ring(args, (unsigned long)empty_string, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* dqblk fields if present
*/
dqblk.dqb_valid = 0;
if ((cmd == PPM_Q_GETQUOTA) || (cmd == PPM_Q_SETQUOTA)) {
len = ppm_copy_from_user(&dqblk, (void *)val, sizeof(struct if_dqblk));
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
}
if (dqblk.dqb_valid & QIF_BLIMITS) {
res = val_to_ring(args, dqblk.dqb_bhardlimit, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, dqblk.dqb_bsoftlimit, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
if (dqblk.dqb_valid & QIF_SPACE) {
res = val_to_ring(args, dqblk.dqb_curspace, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
if (dqblk.dqb_valid & QIF_ILIMITS) {
res = val_to_ring(args, dqblk.dqb_ihardlimit, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, dqblk.dqb_isoftlimit, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
if (dqblk.dqb_valid & QIF_BTIME) {
res = val_to_ring(args, dqblk.dqb_btime, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
if (dqblk.dqb_valid & QIF_ITIME) {
res = val_to_ring(args, dqblk.dqb_itime, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
/*
* dqinfo fields if present
*/
dqinfo.dqi_valid = 0;
if ((cmd == PPM_Q_GETINFO) || (cmd == PPM_Q_SETINFO)) {
len = ppm_copy_from_user(&dqinfo, (void *)val, sizeof(struct if_dqinfo));
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
}
if (dqinfo.dqi_valid & IIF_BGRACE) {
res = val_to_ring(args, dqinfo.dqi_bgrace, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
if (dqinfo.dqi_valid & IIF_IGRACE) {
res = val_to_ring(args, dqinfo.dqi_igrace, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
if (dqinfo.dqi_valid & IIF_FLAGS) {
res = val_to_ring(args, dqinfo.dqi_flags, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
} else {
res = val_to_ring(args, 0, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
quota_fmt_out = PPM_QFMT_NOT_USED;
if (cmd == PPM_Q_GETFMT) {
len = ppm_copy_from_user("a_fmt_out, (void *)val, sizeof(uint32_t));
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
quota_fmt_out = quotactl_fmt_to_scap(quota_fmt_out);
}
res = val_to_ring(args, quota_fmt_out, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_sysdigevent_e(struct event_filler_arguments *args)
{
int res;
/*
* event_type
*/
res = val_to_ring(args, (unsigned long)args->sched_prev, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* event_data
*/
res = val_to_ring(args, (unsigned long)args->sched_next, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_getresuid_and_gid_x(struct event_filler_arguments *args)
{
int res;
unsigned long val, len;
uint32_t uid;
int16_t retval;
/*
* return value
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* ruid
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
#ifdef CONFIG_COMPAT
if (!args->compat) {
#endif
len = ppm_copy_from_user(&uid, (void *)val, sizeof(uint32_t));
#ifdef CONFIG_COMPAT
} else {
len = ppm_copy_from_user(&uid, (void *)compat_ptr(val), sizeof(uint32_t));
}
#endif
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
res = val_to_ring(args, uid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* euid
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
len = ppm_copy_from_user(&uid, (void *)val, sizeof(uint32_t));
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
res = val_to_ring(args, uid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* suid
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
len = ppm_copy_from_user(&uid, (void *)val, sizeof(uint32_t));
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
res = val_to_ring(args, uid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u32 flock_flags_to_scap(unsigned long flags)
{
u32 res = 0;
if (flags & LOCK_EX)
res |= PPM_LOCK_EX;
if (flags & LOCK_SH)
res |= PPM_LOCK_SH;
if (flags & LOCK_UN)
res |= PPM_LOCK_UN;
if (flags & LOCK_NB)
res |= PPM_LOCK_NB;
return res;
}
static int f_sys_flock_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
u32 flags;
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
syscall_get_arguments(current, args->regs, 1, 1, &val);
flags = flock_flags_to_scap(val);
res = val_to_ring(args, flags, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_setns_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
u32 flags;
/*
* parse fd
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* get type, parse as clone flags as it's a subset of it
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
flags = clone_flags_to_scap(val);
res = val_to_ring(args, flags, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_unshare_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
u32 flags;
/*
* get type, parse as clone flags as it's a subset of it
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
flags = clone_flags_to_scap(val);
res = val_to_ring(args, flags, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#ifdef CAPTURE_SIGNAL_DELIVERIES
static int f_sys_signaldeliver_e(struct event_filler_arguments *args)
{
int res;
/*
* source pid
*/
res = val_to_ring(args, args->spid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* destination pid
*/
res = val_to_ring(args, args->dpid, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* signal number
*/
res = val_to_ring(args, args->signo, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#endif
#ifdef CAPTURE_PAGE_FAULTS
static inline u32 pf_flags_to_scap(unsigned long flags)
{
u32 res = 0;
/* Page fault error codes don't seem to be clearly defined in header
* files througout the kernel except in some emulation modes (e.g. kvm)
* which we can't assume to exist, so I just took the definitions from
* the x86 manual. If we end up supporting another arch for page faults,
* refactor this.
*/
if (flags & 0x1)
res |= PPM_PF_PROTECTION_VIOLATION;
else
res |= PPM_PF_PAGE_NOT_PRESENT;
if (flags & 0x2)
res |= PPM_PF_WRITE_ACCESS;
else
res |= PPM_PF_READ_ACCESS;
if (flags & 0x4)
res |= PPM_PF_USER_FAULT;
else
res |= PPM_PF_SUPERVISOR_FAULT;
if (flags & 0x8)
res |= PPM_PF_RESERVED_PAGE;
if (flags & 0x10)
res |= PPM_PF_INSTRUCTION_FETCH;
return res;
}
static int f_sys_pagefault_e(struct event_filler_arguments *args)
{
int res;
res = val_to_ring(args, args->fault_data.address, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, args->fault_data.regs->ip, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, pf_flags_to_scap(args->fault_data.error_code), 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
#endif
static int f_cpu_hotplug_e(struct event_filler_arguments *args)
{
int res;
/*
* cpu
*/
res = val_to_ring(args, (uint64_t)args->sched_prev, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* action
*/
res = val_to_ring(args, (uint64_t)args->sched_next, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u16 semop_flags_to_scap(short flags)
{
u16 res = 0;
if (flags & IPC_NOWAIT)
res |= PPM_IPC_NOWAIT;
if (flags & SEM_UNDO)
res |= PPM_SEM_UNDO;
return res;
}
static int f_sys_semop_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* semid
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_semop_x(struct event_filler_arguments *args)
{
unsigned long nsops;
int res;
int64_t retval;
struct sembuf *ptr;
/*
* return value
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* nsops
* actually this could be read in the enter function but
* we also need to know the value to access the sembuf structs
*/
syscall_get_arguments(current, args->regs, 2, 1, &nsops);
res = val_to_ring(args, nsops, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* sembuf
*/
syscall_get_arguments(current, args->regs, 1, 1, (unsigned long *) &ptr);
if (nsops && ptr) {
/* max length of sembuf array in g_event_info = 2 */
const unsigned max_nsops = 2;
unsigned j;
for (j = 0; j < max_nsops; j++) {
struct sembuf sops = {0, 0, 0};
if (nsops--)
if (unlikely(ppm_copy_from_user(&sops, (void *)&ptr[j], sizeof(struct sembuf))))
return PPM_FAILURE_INVALID_USER_MEMORY;
res = val_to_ring(args, sops.sem_num, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, sops.sem_op, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
res = val_to_ring(args, semop_flags_to_scap(sops.sem_flg), 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
}
}
return add_sentinel(args);
}
static inline u32 semget_flags_to_scap(unsigned flags)
{
u32 res = 0;
if (flags & IPC_CREAT)
res |= PPM_IPC_CREAT;
if (flags & IPC_EXCL)
res |= PPM_IPC_EXCL;
return res;
}
static int f_sys_semget_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* key
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* nsems
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* semflg
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
res = val_to_ring(args, semget_flags_to_scap(val), 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u32 semctl_cmd_to_scap(unsigned cmd)
{
switch (cmd) {
case IPC_STAT: return PPM_IPC_STAT;
case IPC_SET: return PPM_IPC_SET;
case IPC_RMID: return PPM_IPC_RMID;
case IPC_INFO: return PPM_IPC_INFO;
case SEM_INFO: return PPM_SEM_INFO;
case SEM_STAT: return PPM_SEM_STAT;
case GETALL: return PPM_GETALL;
case GETNCNT: return PPM_GETNCNT;
case GETPID: return PPM_GETPID;
case GETVAL: return PPM_GETVAL;
case GETZCNT: return PPM_GETZCNT;
case SETALL: return PPM_SETALL;
case SETVAL: return PPM_SETVAL;
}
return 0;
}
static int f_sys_semctl_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* semid
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* semnum
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* cmd
*/
syscall_get_arguments(current, args->regs, 2, 1, &val);
res = val_to_ring(args, semctl_cmd_to_scap(val), 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* optional argument semun/val
*/
if (val == SETVAL)
syscall_get_arguments(current, args->regs, 3, 1, &val);
else
val = 0;
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_semctl_x(struct event_filler_arguments *args)
{
int res;
int64_t retval;
/*
* return value
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static inline u32 access_flags_to_scap(unsigned flags)
{
u32 res = 0;
if (flags == 0/*F_OK*/) {
res = PPM_F_OK;
} else {
if (flags & MAY_EXEC)
res |= PPM_X_OK;
if (flags & MAY_READ)
res |= PPM_R_OK;
if (flags & MAY_WRITE)
res |= PPM_W_OK;
}
return res;
}
static int f_sys_access_e(struct event_filler_arguments *args)
{
unsigned long val;
int res;
/*
* mode
*/
syscall_get_arguments(current, args->regs, 1, 1, &val);
res = val_to_ring(args, access_flags_to_scap(val), 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
static int f_sys_access_x(struct event_filler_arguments *args)
{
unsigned long val;
int res;
int64_t retval;
/*
* return value
*/
retval = (int64_t)syscall_get_return_value(current, args->regs);
res = val_to_ring(args, retval, 0, false, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
/*
* pathname
*/
syscall_get_arguments(current, args->regs, 0, 1, &val);
res = val_to_ring(args, val, 0, true, 0);
if (unlikely(res != PPM_SUCCESS))
return res;
return add_sentinel(args);
}
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