From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Sat, 13 Dec 2014 00:58:05 +0000 (-0800)
Subject: decompress_bunzip2: off by one in get_next_block()
X-Git-Tag: v3.2.67~95
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2895979352e50321dddd7156272890f9cd14de1;p=pandora-kernel.git

decompress_bunzip2: off by one in get_next_block()

commit b5c8afe5be51078a979d86ae5ae78c4ac948063d upstream.

"origPtr" is used as an offset into the bd->dbuf[] array.  That array is
allocated in start_bunzip() and has "bd->dbufSize" number of elements so
the test here should be >= instead of >.

Later we check "origPtr" again before using it as an offset so I don't
know if this bug can be triggered in real life.

Fixes: bc22c17e12c1 ('bzip2/lzma: library support for gzip, bzip2 and lzma decompression')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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