udf: Sanitize nanoseconds for time stamps
Reportedly some UDF filesystems are recorded with bogus subsecond values
resulting in nanoseconds being over 10^9. Sanitize nanoseconds in time
stamps when loading them from disk.
Reported-by: Ian Turner <vectro@vectro.org>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/udf/udftime.c b/fs/udf/udftime.c
index 14626b3..0927a4b 100644
--- a/fs/udf/udftime.c
+++ b/fs/udf/udftime.c
@@ -62,6 +62,11 @@ udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src)
dest->tv_sec -= offset * 60;
dest->tv_nsec = 1000 * (src.centiseconds * 10000 +
src.hundredsOfMicroseconds * 100 + src.microseconds);
+ /*
+ * Sanitize nanosecond field since reportedly some filesystems are
+ * recorded with bogus sub-second values.
+ */
+ dest->tv_nsec %= NSEC_PER_SEC;
return dest;
}