[FFmpeg-devel] [PATCH 2/8] avcodec/wmadec: Check block_align
Michael Niedermayer
michael at niedermayer.cc
Thu Oct 31 19:58:24 EET 2019
Fixes: out of array access
Fixes: 18432/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAV2_fuzzer-5675574936207360
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/wmadec.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index 78b51e5871..25c1d9a452 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -828,6 +828,8 @@ static int wma_decode_superframe(AVCodecContext *avctx, void *data,
buf_size, avctx->block_align);
return AVERROR_INVALIDDATA;
}
+ if (avctx->block_align < 0)
+ return AVERROR_INVALIDDATA;
if (avctx->block_align)
buf_size = avctx->block_align;
--
2.23.0
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