[PATCH] futex: check and validate timevals
The futex timeval is not checked for correctness. The change does not
break existing applications as the timeval is supplied by glibc (and glibc
always passes a correct value), but the glibc-internal tests for this
functionality fail.
Signed-off-by: Thomas Gleixner <tglx@tglx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 54274fc..1ab6a0e 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -129,9 +129,11 @@
unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
int val2 = 0;
- if ((op == FUTEX_WAIT) && utime) {
+ if (utime && (op == FUTEX_WAIT)) {
if (get_compat_timespec(&t, utime))
return -EFAULT;
+ if (!timespec_valid(&t))
+ return -EINVAL;
timeout = timespec_to_jiffies(&t) + 1;
}
if (op >= FUTEX_REQUEUE)
