From 7ecef8c8b70c21c944ccdf8b8406292e71038a98 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Thu, 4 Sep 2014 14:06:55 +0200
Subject: [PATCH] udf: Avoid infinite loop when processing indirect ICBs

commit c03aa9f6e1f938618e6db2e23afef0574efeeb65 upstream.

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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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