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avcodec/snowdec: Check for remaining bitstream in decode_blocks()
Fixes: Timeout Fixes: 3142/clusterfuzz-testcase-5007853163118592 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit 4527ec2216109867498edc3ac8a17fd879b5d017) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -434,6 +434,8 @@ static int decode_blocks(SnowContext *s){
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for(y=0; y<h; y++){
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for(x=0; x<w; x++){
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if (s->c.bytestream >= s->c.bytestream_end)
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return AVERROR_INVALIDDATA;
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if ((res = decode_q_branch(s, 0, x, y)) < 0)
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return res;
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}
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