From: Lasse Collin <lasse.collin@tukaani.org>
Date: Thu, 13 Jan 2011 01:01:19 +0000 (-0800)
Subject: Decompressors: validate match distance in decompress_unlzma.c
X-Git-Tag: v2.6.38-rc1~256
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb0cf3e19b4940a2d26dcdea03510ae16a580fcd;p=pandora-kernel.git

Decompressors: validate match distance in decompress_unlzma.c

Validate the newly decoded distance (rep0) in process_bit1().  This is to
detect corrupt LZMA data quickly.  The old code can run for long time
producing garbage until it hits the end of the input.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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