/usr/src/virtualbox-guest-4.1.42/vboxguest/common/ is in virtualbox-guest-dkms 4.1.42-dfsg-1+deb7u1.
This file is owned by root:root, with mode 0o755.
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/usr/src/virtualbox-guest-4.1.42/vboxguest/common/alloc/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/alloc/alloc.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/alloc/heapsimple.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/err/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/err/RTErrConvertFromErrno.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/err/RTErrConvertToErrno.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/log/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/log/log.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/log/logcom.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/log/logellipsis.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/log/logformat.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/log/logrel.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/log/logrelellipsis.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/gcc/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/gcc/divdi3.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/gcc/moddi3.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/gcc/qdivrem.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/gcc/quad.h
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/gcc/udivdi3.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/math/gcc/umoddi3.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/RTAssertMsg1Weak.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/RTAssertMsg2.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/RTAssertMsg2Add.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/RTAssertMsg2AddWeak.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/RTAssertMsg2AddWeakV.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/RTAssertMsg2Weak.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/RTAssertMsg2WeakV.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/assert.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/misc/thread.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/RTStrCopy.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/RTStrCopyP.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/strformat.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/strformatrt.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/strformattype.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/strprintf.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/string/strtonum.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/avl_Base.cpp.h
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/avl_Destroy.cpp.h
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/avl_DoWithAll.cpp.h
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/avl_Get.cpp.h
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/avl_GetBestFit.cpp.h
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/avl_RemoveBestFit.cpp.h
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/table/avlpv.c
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/time/
/usr/src/virtualbox-guest-4.1.42/vboxguest/common/time/time.c