[FFmpeg-devel] [PATCH 5/5] avcodec/dsicinvideo: Fail if there is only a small fraction of the data available that comprises a full frame

[Michael Niedermayer]

Fixes: Timeout
Fixes: 6306/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DSICINVIDEO_fuzzer-5079253549842432

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/dsicinvideo.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavcodec/dsicinvideo.c b/libavcodec/dsicinvideo.c
index add7afa383..aa080417d2 100644
--- a/libavcodec/dsicinvideo.c
+++ b/libavcodec/dsicinvideo.c
@@ -158,6 +158,9 @@ static int cin_decode_lzss(const unsigned char *src, int src_size,
         }
     }
 
+    if (dst_end - dst > dst_size - dst_size/10)
+        return AVERROR_INVALIDDATA;
+
     return 0;
 }
 
@@ -184,6 +187,10 @@ static int cin_decode_rle(const unsigned char *src, int src_size,
         }
         dst += len;
     }
+
+    if (dst_end - dst > dst_size - dst_size/10)
+        return AVERROR_INVALIDDATA;
+
     return 0;
 }
 
-- 
2.17.0