From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sun, 12 Mar 2017 02:04:05 +0000 (+0100)
Subject: avcodec/rv34: Fix runtime error: signed integer overflow: 36880 * 66288 cannot be... 
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=a66c6e28b543804f50df1c6083a204219b6b1daa;p=ffmpeg

avcodec/rv34: Fix runtime error: signed integer overflow: 36880 * 66288 cannot be represented in type 'int'

Fixes: 768/clusterfuzz-testcase-4807444305805312

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---

diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index be49804ebd5..d2d676a86d0 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -1636,7 +1636,7 @@ static AVRational update_sar(int old_w, int old_h, AVRational sar, int new_w, in
     if (!sar.num)
         sar = (AVRational){1, 1};
 
-    sar = av_mul_q(sar, (AVRational){new_h * old_w, new_w * old_h});
+    sar = av_mul_q(sar, av_mul_q((AVRational){new_h, new_w}, (AVRational){old_w, old_h}));
     return sar;
 }