[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>

diff --git a/kernel/time.c b/kernel/time.c
index bbc8ca1..c689b53 100644 (file)
--- 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;