time: settimeofday: Validate the values of tv from user

[pandora-kernel.git] / include / linux / time.h

diff --git a/include/linux/time.h b/include/linux/time.h
index 8c42cf8..5989b0e 100644 (file)
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -99,6 +99,19 @@ static inline bool timespec_valid_strict(const struct timespec *ts)
        return true;
 }
 
+static inline bool timeval_valid(const struct timeval *tv)
+{
+       /* Dates before 1970 are bogus */
+       if (tv->tv_sec < 0)
+               return false;
+
+       /* Can't have more microseconds then a second */
+       if (tv->tv_usec < 0 || tv->tv_usec >= USEC_PER_SEC)
+               return false;
+
+       return true;
+}
+
 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
 
 #define CURRENT_TIME           (current_kernel_time())