cd9660: Add length checks to Rock Ridge parserHEADmain

* cd9660_rrip_slink() did not check that the lengths of individual
  entries do not exceed the length of the overall record.

* cd9660_rrip_altname() did not check that the length of the record
  was at least 5 before subtracting 5 from it.

Note that in both cases, a better solution would be to check the length
of the data before calling the handler, or immediately upon entry of
the handler, but this would require significant refactoring.

MFC after:	1 week
Reported by:	Calif.io in collaboration with Claude and Anthropic Research
Reported by:	Adam Crosser, Praetorian
Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D56215

0 files changed, 0 insertions, 0 deletions