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PRE(sys_prctl): handle PR_SET_SECCOMP.

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git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14994
This commit is contained in:
Julian Seward 2015-03-10 11:05:10 +00:00
parent a016e927bb
commit 37f7ddaea7
2 changed files with 24 additions and 0 deletions
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15
coregrind/m_syswrap/syswrap-linux.c
View File

@ -1018,6 +1018,21 @@ PRE(sys_prctl)
case VKI_PR_SET_PTRACER:
PRE_REG_READ2(int, "prctl", int, option, int, ptracer_process_ID);
break;
case VKI_PR_SET_SECCOMP:
/* This is a bit feeble in that it uses |option| before checking
it, but at least both sides of the conditional check it. */
if (ARG2 == VKI_SECCOMP_MODE_FILTER) {
PRE_REG_READ3(int, "prctl", int, option, int, mode, char*, filter);
if (ARG3) {
/* Should check that ARG3 points at a valid struct sock_fprog.
Sounds complex; hence be lame. */
PRE_MEM_READ( "prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, filter)",
ARG3, 1 );
}
} else {
PRE_REG_READ2(int, "prctl", int, option, int, mode);
}
break;
default:
PRE_REG_READ5(long, "prctl",
int, option, unsigned long, arg2, unsigned long, arg3,

9
include/vki/vki-linux.h
View File

@ -2508,6 +2508,9 @@ struct vki_vt_consize {
# define VKI_PR_ENDIAN_BIG 0
# define VKI_PR_ENDIAN_LITTLE 1 /* True little endian mode */
# define VKI_PR_ENDIAN_PPC_LITTLE 2 /* "PowerPC" pseudo little endian */
#define VKI_PR_SET_SECCOMP 22
#define VKI_PR_SET_PTRACER 0x59616d61
//----------------------------------------------------------------------
@ -4601,6 +4604,12 @@ enum vki_kcmp_type {
VKI_KCMP_TYPES
};
//----------------------------------------------------------------------
// From linux-3.19-rc5/include/uapi/linux/seccomp.h
//----------------------------------------------------------------------
#define VKI_SECCOMP_MODE_FILTER 2
#endif // __VKI_LINUX_H
/*--------------------------------------------------------------------*/