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avcodec/utils: Better check for channels in av_get_audio_frame_duration()

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Fixes integer overflow
Fixes: 0c2625f236ced104d402b4a03c0d65c7/asan_generic_274e1ce_5990_9314e7a67c26aecf011b178ade9f217c.avi

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4e16ad2868a1819de6680fc355a8eb20164adaea)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-11-14 01:35:08 +01:00
parent dbfec68d32
commit c0748b9954
1 changed files with 1 additions and 1 deletions
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libavcodec/utils.c
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@ -3490,7 +3490,7 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
return frame_bytes * 8 / bps; return frame_bytes * 8 / bps;
} }
if (ch > 0) { if (ch > 0 && ch < INT_MAX/16) {
/* calc from frame_bytes and channels */ /* calc from frame_bytes and channels */
switch (id) { switch (id) {
case AV_CODEC_ID_ADPCM_AFC: case AV_CODEC_ID_ADPCM_AFC: