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 8c0216e..a87b440 100644 (file)
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -138,6 +138,19 @@ static inline bool timespec_valid_strict(const struct timespec *ts)
        return true;
 }
 
        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 void read_persistent_clock(struct timespec *ts);
 extern void read_boot_clock(struct timespec *ts);
 extern int update_persistent_clock(struct timespec now);
 extern void read_persistent_clock(struct timespec *ts);
 extern void read_boot_clock(struct timespec *ts);
 extern int update_persistent_clock(struct timespec now);