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avformat/apm: Use 64bit for bit_rate computation

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Fixes: signed integer overflow: -1155522528 * 4 cannot be represented in type 'int'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_APM_fuzzer-6580670570299392

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-09-17 21:24:49 +02:00
parent d0349c9929
commit 5b23cab5c7
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GPG Key ID: B18E8928B3948D64
1 changed files with 1 additions and 1 deletions
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libavformat/apm.c
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@ -148,7 +148,7 @@ static int apm_read_header(AVFormatContext *s)
par->codec_id = AV_CODEC_ID_ADPCM_IMA_APM;
par->format = AV_SAMPLE_FMT_S16;
par->bit_rate = par->ch_layout.nb_channels *
par->sample_rate *
(int64_t)par->sample_rate *
par->bits_per_coded_sample;
if ((ret = avio_read(s->pb, buf, APM_FILE_EXTRADATA_SIZE)) < 0)