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avcodec/utils: Check sample rate before use for AV_CODEC_ID_BINKAUDIO_DCT in get_audio_frame_duration()

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Fixes: shift exponent 95 is too large for 32-bit type 'int'
Fixes: 26590/clusterfuzz-testcase-minimized-ffmpeg_dem_SMACKER_fuzzer-5120609937522688

Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ec7e0d4288)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-10-27 17:21:19 +01:00
parent 5e8bff6c24
commit c0b0cb5d80
1 changed files with 4 additions and 1 deletions
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5
libavcodec/utils.c
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@ -3473,8 +3473,11 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
if (ch > 0) {
/* calc from sample rate and channels */
if (id == AV_CODEC_ID_BINKAUDIO_DCT)
if (id == AV_CODEC_ID_BINKAUDIO_DCT) {
if (sr / 22050 > 22)
return 0;
return (480 << (sr / 22050)) / ch;
}
}
}