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avcodec/sbcdec: Initialize number of channels 

Fixes: out of array access
Fixes: 17609/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SBC_fuzzer-5758729319874560

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Moritz Barsnick <barsnick@gmx.net>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 02fb6a2147)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-09-24 23:50:23 +02:00
parent 026f243d71
commit c0f315b835
1 changed files with 1 additions and 0 deletions
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libavcodec/sbcdec.c
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@ -348,6 +348,7 @@ static int sbc_decode_frame(AVCodecContext *avctx,
if (frame_length <= 0)
return frame_length;
avctx->channels =
frame->channels = sbc->frame.channels;
frame->format = AV_SAMPLE_FMT_S16P;
frame->nb_samples = sbc->frame.blocks * sbc->frame.subbands;