John Wright 2f65dd475c x86: gettimeofday() vDSO: fix segfault when tv == NULL ... According to the gettimeofday(2) manual: If either tv or tz is NULL, the corresponding structure is not set or returned. Since it is legal to give NULL as the tv argument, the code should make sure tv is not NULL before trying to dereference it. This issue manifests itself on x86_64 when vdso=0 is not on the kernel command-line and libc uses the vDSO for gettimeofday() (e.g. glibc >= 2.7). A simple reproducer: #include <stdio.h> #include <sys/time.h> int main(void) { struct timezone tz; gettimeofday(NULL, &tz); return 0; } See http://bugs.debian.org/466491 for more details. [ Impact: fix gettimeofday(NULL, &tz) segfault ] Signed-off-by: John Wright <john.wright@hp.com> Cc: Andi Kleen <ak@suse.de> Cc: John Wright <john.wright@hp.com> LKML-Reference: <1241037121-14805-1-git-send-email-john.wright@hp.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2009-04-30 12:31:45 +02:00
..
vdso32
.gitignore
Makefile	x86: no stack protector for vdso	2009-02-10 00:41:56 +01:00
vclock_gettime.c	x86: gettimeofday() vDSO: fix segfault when tv == NULL	2009-04-30 12:31:45 +02:00
vdso32-setup.c	[S390] arch_setup_additional_pages arguments	2008-12-25 13:38:54 +01:00
vdso32.S
vdso-layout.lds.S
vdso-note.S
vdso.lds.S
vdso.S
vextern.h
vgetcpu.c
vma.c	x86, mm: rename TASK_SIZE64 => TASK_SIZE_MAX	2009-02-21 00:09:44 +01:00
vvar.c