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avformat/soxdec: Check channels to be positive 

Fixes: signed integer overflow: 32 * -1795162112 cannot be represented in type 'int'
Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_SOX_fuzzer-6724151473340416

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 b0588b73da)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-17 22:52:59 +01:00
parent bbb5494801
commit d4e071be5c
1 changed files with 1 additions and 1 deletions
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libavformat/soxdec.c
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@ -90,7 +90,7 @@ static int sox_read_header(AVFormatContext *s)
sample_rate_frac);
if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size
|| st->codecpar->channels > 65535) /* Reserve top 16 bits */ {
|| st->codecpar->channels > 65535 || st->codecpar->channels <= 0) /* Reserve top 16 bits */ {
av_log(s, AV_LOG_ERROR, "invalid header\n");
return AVERROR_INVALIDDATA;
}