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avformat/vqf: Ensure that comm_chunk is fully read

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Fixes: use of uninitialized memory
Fixes: 412125811/clusterfuzz-testcase-minimized-ffmpeg_dem_VQF_fuzzer-6253774274887680

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2025-07-23 13:36:42 +02:00
parent c6cb3ab7ff
commit 1b7a327b3a
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1 changed files with 3 additions and 1 deletions
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libavformat/vqf.c
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@ -144,7 +144,9 @@ static int vqf_read_header(AVFormatContext *s)
if (len < 12)
return AVERROR_INVALIDDATA;
avio_read(s->pb, comm_chunk, 12);
ret = ffio_read_size(s->pb, comm_chunk, 12);
if (ret < 0)
return ret;
st->codecpar->ch_layout.nb_channels = AV_RB32(comm_chunk) + 1;
read_bitrate = AV_RB32(comm_chunk + 4);
rate_flag = AV_RB32(comm_chunk + 8);