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>

parent 1291a0d5

fs/udf/udftime.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}