[FFmpeg-devel] [PATCH 5/5] avformat/mvdec: Check bytes_per_sample

[Michael Niedermayer]

Fixes: division by zero
Fixes: 42814/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-4787014237552640

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavformat/mvdec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c
index 1a5012e5076..390f6ba4de8 100644
--- a/libavformat/mvdec.c
+++ b/libavformat/mvdec.c
@@ -366,6 +366,9 @@ static int mv_read_header(AVFormatContext *avctx)
             avpriv_request_sample(avctx, "Audio compression (format %i)", v);
         }
 
+        if (bytes_per_sample <= 0)
+            return AVERROR_INVALIDDATA;
+
         if (set_channels(avctx, ast, avio_rb32(pb)) < 0)
             return AVERROR_INVALIDDATA;
 
-- 
2.17.1