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check region depth for validity

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(32/64/128 would crash at least due to 1<<depth allocation later,
and no i do not have a sample file)

Originally committed as revision 11062 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-11-19 20:14:46 +00:00
parent c5a2fe8f1f
commit 2867ed9b1c
1 changed files with 4 additions and 0 deletions
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4
libavcodec/dvbsubdec.c
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@ -1035,6 +1035,10 @@ static void dvbsub_parse_region_segment(AVCodecContext *avctx,
} }
region->depth = 1 << (((*buf++) >> 2) & 7); region->depth = 1 << (((*buf++) >> 2) & 7);
if(region->depth<2 || region->depth>8){
av_log(avctx, AV_LOG_ERROR, "region depth %d is invalid\n", region->depth);
region->depth= 4;
}
region->clut = *buf++; region->clut = *buf++;
if (region->depth == 8) if (region->depth == 8)