udf: Fortify LVID loading
authorJan Kara <jack@suse.cz>
Thu, 12 Sep 2013 20:00:15 +0000 (22:00 +0200)
committerJan Kara <jack@suse.cz>
Tue, 24 Sep 2013 09:23:33 +0000 (11:23 +0200)
commit69d75671d985ccdb291e4d19ddfdecd12440e857
tree38e68e78441e81c8b35831fe559ef3fc0f9e2fb6
parentd8524ae9d6f492a9c6db9f4d89c5f9b8782fa2d5
udf: Fortify LVID loading

A user has reported an oops in udf_statfs() that was caused by
numOfPartitions entry in LVID structure being corrupted. Fix the problem
by verifying whether numOfPartitions makes sense at least to the extent
that LVID fits into a single block as it should.

Reported-by: Juergen Weigert <jw@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
fs/udf/ialloc.c
fs/udf/super.c
fs/udf/udf_sb.h