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smacker: add sanity check for length in smacker_decode_tree()

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-06-21 16:01:52 +02:00
parent 7681d0eaca
commit b829da3639
1 changed files with 4 additions and 0 deletions
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4
libavcodec/smacker.c
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@ -96,6 +96,10 @@ enum SmkBlockTypes {
*/
static int smacker_decode_tree(GetBitContext *gb, HuffContext *hc, uint32_t prefix, int length)
{
if(length > 32) {
av_log(NULL, AV_LOG_ERROR, "length too long\n");
return -1;
}
if(!get_bits1(gb)){ //Leaf
if(hc->current >= 256){
av_log(NULL, AV_LOG_ERROR, "Tree size exceeded!\n");