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ffv1: fix crash caused by version becoming inconsistent

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Fixes part of Ticket1372

Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-06-02 02:21:30 +02:00
parent 0bae6661cd
commit 97c281d5b7
1 changed files with 6 additions and 1 deletions
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7
libavcodec/ffv1.c
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@ -1769,7 +1769,12 @@ static int read_header(FFV1Context *f){
memset(state, 128, sizeof(state));
if(f->version < 2){
f->version= get_symbol(c, state, 0);
unsigned v= get_symbol(c, state, 0);
if(v >= 2){
av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
return AVERROR_INVALIDDATA;
}
f->version = v;
f->ac= f->avctx->coder_type= get_symbol(c, state, 0);
if(f->ac>1){
for(i=1; i<256; i++){