From b8aa7b9a6d8618cf8997f20602be11a2c31c83d6 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Wed, 24 Oct 2018 01:44:12 +0200
Subject: [PATCH] avutil/integer: Fix integer overflow in av_mul_i()
Found-by: fate
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3cc3cb663bf3061e40356392d2f7638de6a479fe)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavutil/integer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavutil/integer.c b/libavutil/integer.c
index 890e314dce..78e252fbde 100644
--- a/libavutil/integer.c
+++ b/libavutil/integer.c
@@ -74,7 +74,7 @@ AVInteger av_mul_i(AVInteger a, AVInteger b){
if(a.v[i])
for(j=i; j<AV_INTEGER_SIZE && j-i<=nb; j++){
- carry= (carry>>16) + out.v[j] + a.v[i]*b.v[j-i];
+ carry= (carry>>16) + out.v[j] + a.v[i]*(unsigned)b.v[j-i];
out.v[j]= carry;
}
}