/usr/share/gocode/src/github.com/opencontainers/runc/libcontainer/integration/seccomp_test.go is in golang-github-opencontainers-runc-dev 0.0.8+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 | // +build linux,cgo,seccomp
package integration
import (
"strings"
"syscall"
"testing"
"github.com/opencontainers/runc/libcontainer"
"github.com/opencontainers/runc/libcontainer/configs"
libseccomp "github.com/seccomp/libseccomp-golang"
)
func TestSeccompDenyGetcwd(t *testing.T) {
if testing.Short() {
return
}
rootfs, err := newRootfs()
if err != nil {
t.Fatal(err)
}
defer remove(rootfs)
config := newTemplateConfig(rootfs)
config.Seccomp = &configs.Seccomp{
DefaultAction: configs.Allow,
Syscalls: []*configs.Syscall{
{
Name: "getcwd",
Action: configs.Errno,
},
},
}
container, err := newContainer(config)
if err != nil {
t.Fatal(err)
}
defer container.Destroy()
buffers := newStdBuffers()
pwd := &libcontainer.Process{
Cwd: "/",
Args: []string{"pwd"},
Env: standardEnvironment,
Stdin: buffers.Stdin,
Stdout: buffers.Stdout,
Stderr: buffers.Stderr,
}
err = container.Start(pwd)
if err != nil {
t.Fatal(err)
}
ps, err := pwd.Wait()
if err == nil {
t.Fatal("Expecting error (negative return code); instead exited cleanly!")
}
var exitCode int
status := ps.Sys().(syscall.WaitStatus)
if status.Exited() {
exitCode = status.ExitStatus()
} else if status.Signaled() {
exitCode = -int(status.Signal())
} else {
t.Fatalf("Unrecognized exit reason!")
}
if exitCode == 0 {
t.Fatalf("Getcwd should fail with negative exit code, instead got %d!", exitCode)
}
expected := "pwd: getcwd: Operation not permitted"
actual := strings.Trim(buffers.Stderr.String(), "\n")
if actual != expected {
t.Fatalf("Expected output %s but got %s\n", expected, actual)
}
}
func TestSeccompPermitWriteConditional(t *testing.T) {
if testing.Short() {
return
}
rootfs, err := newRootfs()
if err != nil {
t.Fatal(err)
}
defer remove(rootfs)
config := newTemplateConfig(rootfs)
config.Seccomp = &configs.Seccomp{
DefaultAction: configs.Allow,
Syscalls: []*configs.Syscall{
{
Name: "write",
Action: configs.Errno,
Args: []*configs.Arg{
{
Index: 0,
Value: 1,
Op: configs.GreaterThan,
},
},
},
},
}
container, err := newContainer(config)
if err != nil {
t.Fatal(err)
}
defer container.Destroy()
buffers := newStdBuffers()
dmesg := &libcontainer.Process{
Cwd: "/",
Args: []string{"busybox", "ls", "/"},
Env: standardEnvironment,
Stdin: buffers.Stdin,
Stdout: buffers.Stdout,
Stderr: buffers.Stderr,
}
err = container.Start(dmesg)
if err != nil {
t.Fatal(err)
}
if _, err := dmesg.Wait(); err != nil {
t.Fatalf("%s: %s", err, buffers.Stderr)
}
}
func TestSeccompDenyWriteConditional(t *testing.T) {
if testing.Short() {
return
}
// Only test if library version is v2.2.1 or higher
// Conditional filtering will always error in v2.2.0 and lower
major, minor, micro := libseccomp.GetLibraryVersion()
if (major == 2 && minor < 2) || (major == 2 && minor == 2 && micro < 1) {
return
}
rootfs, err := newRootfs()
if err != nil {
t.Fatal(err)
}
defer remove(rootfs)
config := newTemplateConfig(rootfs)
config.Seccomp = &configs.Seccomp{
DefaultAction: configs.Allow,
Syscalls: []*configs.Syscall{
{
Name: "write",
Action: configs.Errno,
Args: []*configs.Arg{
{
Index: 0,
Value: 1,
Op: configs.GreaterThan,
},
},
},
},
}
container, err := newContainer(config)
if err != nil {
t.Fatal(err)
}
defer container.Destroy()
buffers := newStdBuffers()
dmesg := &libcontainer.Process{
Cwd: "/",
Args: []string{"busybox", "ls", "does_not_exist"},
Env: standardEnvironment,
Stdin: buffers.Stdin,
Stdout: buffers.Stdout,
Stderr: buffers.Stderr,
}
err = container.Start(dmesg)
if err != nil {
t.Fatal(err)
}
ps, err := dmesg.Wait()
if err == nil {
t.Fatal("Expecting negative return, instead got 0!")
}
var exitCode int
status := ps.Sys().(syscall.WaitStatus)
if status.Exited() {
exitCode = status.ExitStatus()
} else if status.Signaled() {
exitCode = -int(status.Signal())
} else {
t.Fatalf("Unrecognized exit reason!")
}
if exitCode == 0 {
t.Fatalf("Busybox should fail with negative exit code, instead got %d!", exitCode)
}
// We're denying write to stderr, so we expect an empty buffer
expected := ""
actual := strings.Trim(buffers.Stderr.String(), "\n")
if actual != expected {
t.Fatalf("Expected output %s but got %s\n", expected, actual)
}
}
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