[FFmpeg-cvslog] avcodec/vmdaudio: Fix channels count bug

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Mar 21 20:30:29 2022 +0100| [31b22defcd8c6f0c95ef3be1ea819adf536ad8cb] | committer: Michael Niedermayer

avcodec/vmdaudio: Fix channels count bug

Fixes: division by zero
Fixes: 45811/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMDAUDIO_fuzzer-6412592581574656
Fixes: 45979/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMDAUDIO_fuzzer-5362043060879360

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=31b22defcd8c6f0c95ef3be1ea819adf536ad8cb
---

 libavcodec/vmdaudio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/vmdaudio.c b/libavcodec/vmdaudio.c
index 045a2da410..875930061a 100644
--- a/libavcodec/vmdaudio.c
+++ b/libavcodec/vmdaudio.c
@@ -85,7 +85,7 @@ static av_cold int vmdaudio_decode_init(AVCodecContext *avctx)
     }
 
     av_channel_layout_uninit(&avctx->ch_layout);
-    av_channel_layout_default(&avctx->ch_layout, channels == 1);
+    av_channel_layout_default(&avctx->ch_layout, channels);
 
     if (avctx->bits_per_coded_sample == 16)
         avctx->sample_fmt = AV_SAMPLE_FMT_S16;