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author | Jan Kara <jack@suse.cz> | 2014-08-17 13:49:57 +0400 |
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committer | Jan Kara <jack@suse.cz> | 2014-08-19 20:29:30 +0400 |
commit | 410dd3cf4c9b36f27ed4542ee18b1af5e68645a4 (patch) | |
tree | be3af2da6fcc9bd0ef2518e6d344d726670b2df7 /fs/ext3/super.c | |
parent | 85cd083b498572fb9fa575cce3ed910c8ee84294 (diff) | |
download | linux-410dd3cf4c9b36f27ed4542ee18b1af5e68645a4.tar.xz |
isofs: Fix unbounded recursion when processing relocated directories
We did not check relocated directory in any way when processing Rock
Ridge 'CL' tag. Thus a corrupted isofs image can possibly have a CL
entry pointing to another CL entry leading to possibly unbounded
recursion in kernel code and thus stack overflow or deadlocks (if there
is a loop created from CL entries).
Fix the problem by not allowing CL entry to point to a directory entry
with CL entry (such use makes no good sense anyway) and by checking
whether CL entry doesn't point to itself.
CC: stable@vger.kernel.org
Reported-by: Chris Evans <cevans@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext3/super.c')
0 files changed, 0 insertions, 0 deletions