From 7d5ca21698112b0a9af49c6ac0023b29a2d959c8 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 14 Jan 2018 00:39:39 +0100 Subject: [PATCH] avcodec/ac3dec_fixed: Fix integer overflow in scale_coefs() Fixes: runtime error: signed integer overflow: 2147483520 + 128 cannot be represented in type 'int' Fixes: 4800/clusterfuzz-testcase-minimized-6110372403609600 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit a1f38c75893c852cf19dcf3e4553549ba1e70950) Signed-off-by: Michael Niedermayer --- libavcodec/ac3dec_fixed.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/ac3dec_fixed.c b/libavcodec/ac3dec_fixed.c index 56b62548ec..ef5fa5501a 100644 --- a/libavcodec/ac3dec_fixed.c +++ b/libavcodec/ac3dec_fixed.c @@ -64,8 +64,8 @@ static void scale_coefs ( int dynrng, int len) { - int i, shift, round; - unsigned mul; + int i, shift; + unsigned mul, round; int temp, temp1, temp2, temp3, temp4, temp5, temp6, temp7; mul = (dynrng & 0x1f) + 0x20;