[FFmpeg-cvslog] avcodec/sbcdec: Initialize number of channels

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Sep 24 23:50:23 2019 +0200| [02fb6a214717d40487cae2b06f13b14fabb6e101] | committer: Michael Niedermayer

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 at gmail.com>
Reviewed-by: Moritz Barsnick <barsnick at gmx.net>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=02fb6a214717d40487cae2b06f13b14fabb6e101
---

 libavcodec/sbcdec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/sbcdec.c b/libavcodec/sbcdec.c
index 546b38c106..937946e2d2 100644
--- a/libavcodec/sbcdec.c
+++ b/libavcodec/sbcdec.c
@@ -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;