Mark Johnston 8e13d6dfb6 udf: Validate the full file entry length
Otherwise a corrupted file entry containing invalid extended attribute
lengths or allocation descriptor lengths can trigger an overflow when
the file entry is loaded.

admbug:		965
PR:		248613
Reported by:	C Turt <ecturt@gmail.com>
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2020-09-22 17:05:01 +00:00
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