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check block_max_depth (fixes crash) 

Originally committed as revision 4718 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-12-03 14:20:03 +00:00
parent 91aa4e3300
commit 4393e6392c
1 changed files with 5 additions and 0 deletions
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5
libavcodec/snow.c
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@ -3185,6 +3185,11 @@ static int decode_header(SnowContext *s){
s->mv_scale= get_symbol(&s->c, s->header_state, 0);
s->qbias= get_symbol(&s->c, s->header_state, 1);
s->block_max_depth= get_symbol(&s->c, s->header_state, 0);
if(s->block_max_depth > 1){
av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large", s->block_max_depth);
s->block_max_depth= 0;
return -1;
}
return 0;
}