[FFmpeg-devel] [PATCH 1/2] avcodec/vmixdec: Fix signed integer overflow in dc

[Michael Niedermayer]

Fixes: signed integer overflow: 2147483181 + 1024 cannot be represented in type 'int'
Fixes: 61117/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMIX_fuzzer-5387692433866752

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/vmixdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/vmixdec.c b/libavcodec/vmixdec.c
index b77c90929a..8f2278b2ea 100644
--- a/libavcodec/vmixdec.c
+++ b/libavcodec/vmixdec.c
@@ -134,7 +134,7 @@ static int decode_dcac(AVCodecContext *avctx,
                     ac_run = get_ue_golomb_long(ac_gb);
             }
 
-            block[0] = dc + add;
+            block[0] = dc + (unsigned)add;
             s->idsp.idct_put(dst + x, linesize, block);
         }
 
-- 
2.17.1