[PATCH] hrtimer: validate timespec of do_sys_settimeofday

Check if the timespec which is provided from user space is normalized.

Signed-off-by: Thomas Gleixner <tglx@linutronix.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>

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/time.c b/kernel/time.c
index bbc8ca194b59..c689b53297cf 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -154,6 +154,9 @@ int do_sys_settimeofday(struct timespec *tv, struct timezone *tz)
         static int firsttime = 1;
         int error = 0;
 
+        if (!timespec_valid(tv))
+                return -EINVAL;
+
         error = security_settime(tv, tz);
         if (error)
                 return error;