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udf: Avoid infinite loop when processing indirect ICBs
authorJan Kara <jack@suse.cz>
Thu, 4 Sep 2014 12:06:55 +0000 (14:06 +0200)
committerJan Kara <jack@suse.cz>
Thu, 4 Sep 2014 12:12:29 +0000 (14:12 +0200)
commitc03aa9f6e1f938618e6db2e23afef0574efeeb65
treeba1f7d3c1e99b262f43a1c2fa39aaf57701c664ctree | snapshot (tar.gz zip)
parentbb7720a0b4a8ca3269fd86fbb45a78d2e0d3deafcommit | diff
udf: Avoid infinite loop when processing indirect ICBs

We did not implement any bound on number of indirect ICBs we follow when
loading inode. Thus corrupted medium could cause kernel to go into an
infinite loop, possibly causing a stack overflow.

Fix the possible stack overflow by removing recursion from
__udf_read_inode() and limit number of indirect ICBs we follow to avoid
infinite loops.

Signed-off-by: Jan Kara <jack@suse.cz>
fs/udf/inode.c diff | blob | blame | history