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fix crash when decoding a truncated H264 slice 

patch by Alexander Chemeris % ipse P ffmpeg A gmail.com %
Original thread:
date: Dec 5, 2006 7:26 PM
subject: [Ffmpeg-devel] [PATCH] Fix crush when truncated slice passed to H.264 decoder

Originally committed as revision 7229 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alexander Chemeris 2006-12-05 22:18:19 +00:00 committed by Guillaume Poirier
parent 3ee5c5b739
commit a083f53c45
1 changed files with 4 additions and 0 deletions
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4
libavcodec/h264.c
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@ -4883,6 +4883,10 @@ static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, in
if(total_coeff==0)
return 0;
if(total_coeff<0) {
av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff<0)\n", s->mb_x, s->mb_y);
return -1;
}
trailing_ones= coeff_token&3;
tprintf("trailing:%d, total:%d\n", trailing_ones, total_coeff);