[FFmpeg-devel] [PATCH 3/4] avcodec/sbcdec: Initilaize nubmer of channels

Michael Niedermayer michael at niedermayer.cc
Wed Sep 25 13:01:19 EEST 2019


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
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 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;
-- 
2.23.0



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