From cf69619141a5742c4e4156177335d553c5bab7b6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Reimar=20D=C3=B6ffinger?= Date: Sat, 19 Feb 2011 11:33:01 +0100 Subject: [PATCH] Fix invalid reads in VC1 decoder Patch discussed and taken from https://roundup.ffmpeg.org/issue2584 (cherry picked from commit 2bbec1eda46d907605772a8b6e8263caa4bc4c82) Change related to CVE-2011-0723 --- libavcodec/vc1dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c index 52392c3f76..abcc5ecda8 100644 --- a/libavcodec/vc1dec.c +++ b/libavcodec/vc1dec.c @@ -1365,7 +1365,7 @@ static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, if (index != vc1_ac_sizes[codingset] - 1) { run = vc1_index_decode_table[codingset][index][0]; level = vc1_index_decode_table[codingset][index][1]; - lst = index >= vc1_last_decode_table[codingset]; + lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0; if(get_bits1(gb)) level = -level; } else {