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avformat/ipmovie: check OPCODE_INIT_VIDEO_BUFFERS size more completely 

Fixes use of uninitialized data

Fixes: signal_sigsegv_1571228_5930_ipmovie_interplayvideo_interplay_dpcm__bislogo.mve

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-22 19:47:34 +01:00
parent e4eb2c957b
commit 2e97e24409
1 changed files with 1 additions and 1 deletions
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2
libavformat/ipmovie.c
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@ -376,7 +376,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
case OPCODE_INIT_VIDEO_BUFFERS:
av_dlog(NULL, "initialize video buffers\n");
if ((opcode_version > 2) || (opcode_size > 8)) {
if ((opcode_version > 2) || (opcode_size > 8) || opcode_size < 4) {
av_dlog(NULL, "bad init_video_buffers opcode\n");
chunk_type = CHUNK_BAD;
break;