Commit da617408 authored by Michael Niedermayer's avatar Michael Niedermayer

avcodec/escape124: Check depth against num_superblocks

Fixes: runtime error: left shift of 66184 by 15 places cannot be represented in type 'int'
Fixes: 1707/clusterfuzz-testcase-minimized-6502767008940032

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent ef010612
......@@ -267,6 +267,11 @@ static int escape124_decode_frame(AVCodecContext *avctx,
cb_size = s->num_superblocks << cb_depth;
}
}
if (s->num_superblocks >= INT_MAX >> cb_depth) {
av_log(avctx, AV_LOG_ERROR, "Depth or num_superblocks are too large\n");
return AVERROR_INVALIDDATA;
}
av_freep(&s->codebooks[i].blocks);
s->codebooks[i] = unpack_codebook(&gb, cb_depth, cb_size);
if (!s->codebooks[i].blocks)
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment