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avcodec/utils: Use more bits for intermediate for AV_CODEC_ID_ADPCM_MS 

Fixes: signed integer overflow: 1172577312 * 2 cannot be represented in type 'int'
Fixes: 29924/clusterfuzz-testcase-minimized-ffmpeg_dem_BOA_fuzzer-4882912874594304

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 2021-02-01 19:55:03 +01:00
parent 712d3ac539
commit 0f441b9063
1 changed files with 1 additions and 1 deletions
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2
libavcodec/utils.c
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@ -1797,7 +1797,7 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
case AV_CODEC_ID_ADPCM_IMA_RAD:
return blocks * ((ba - 4 * ch) * 2 / ch);
case AV_CODEC_ID_ADPCM_MS:
return blocks * (2 + (ba - 7 * ch) * 2 / ch);
return blocks * (2 + (ba - 7 * ch) * 2LL / ch);
case AV_CODEC_ID_ADPCM_MTAF:
return blocks * (ba - 16) * 2 / ch;
}