[FFmpeg-devel] [PATCH 8/8] avcodec/svq3: Check there are bits left before decompression

[Michael Niedermayer]

Fixes: out of array read
Fixes: 402587670/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SVQ3_fuzzer-6343867775647744

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/svq3.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 30bc9334af7..7a95aa4cff9 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -1253,6 +1253,7 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
             uint8_t *buf;
 
             if (watermark_height <= 0 ||
+                get_bits_left(&gb) <= 0 ||
                 (uint64_t)watermark_width * 4 > UINT_MAX / watermark_height)
                 return AVERROR_INVALIDDATA;
 
-- 
2.49.0