[FFmpeg-devel] [PATCH 13/13] avformat/westwood_vqa: Check chunk size

[Michael Niedermayer]

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_WSVQA_fuzzer-6593408795279360

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/westwood_vqa.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/westwood_vqa.c b/libavformat/westwood_vqa.c
index e3d2e2668c4..bd8df5e0b34 100644
--- a/libavformat/westwood_vqa.c
+++ b/libavformat/westwood_vqa.c
@@ -274,6 +274,8 @@ static int wsvqa_read_packet(AVFormatContext *s,
                         return AVERROR(EIO);
 
                     /* the decoder expects chunks to be 16-bit aligned */
+                    if (wsvqa->vqfl_chunk_size == INT_MAX)
+                        return AVERROR_INVALIDDATA;
                     if (wsvqa->vqfl_chunk_size % 2 == 1)
                         wsvqa->vqfl_chunk_size++;
 
-- 
2.17.1