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avformat/cafdec: Check channels

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Fixes: signed integer overflow: -1184429040541376544 * 32 cannot be represented in type 'long'
Fixes: 31788/clusterfuzz-testcase-minimized-ffmpeg_dem_CAF_fuzzer-6236746338664448

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 641c1db22b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-09 22:46:13 +02:00
parent 6128c6f338
commit b4eeac2a1b
1 changed files with 1 additions and 1 deletions
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libavformat/cafdec.c
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@ -79,7 +79,7 @@ static int read_desc_chunk(AVFormatContext *s)
st->codecpar->channels = avio_rb32(pb);
st->codecpar->bits_per_coded_sample = avio_rb32(pb);
if (caf->bytes_per_packet < 0 || caf->frames_per_packet < 0)
if (caf->bytes_per_packet < 0 || caf->frames_per_packet < 0 || st->codecpar->channels < 0)
return AVERROR_INVALIDDATA;
/* calculate bit rate for constant size packets */