From 3a0ff78168f80f5b2c5c5544325aca4023bc67a4 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Thu, 11 May 2017 15:13:53 +0200
Subject: [PATCH] avcodec/aacdec_fixed: Fix multiple shift exponent 33 is too
large for 32-bit type 'int'
Fixes: 1471/clusterfuzz-testcase-minimized-6376460543590400
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/aacdec_fixed.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/libavcodec/aacdec_fixed.c b/libavcodec/aacdec_fixed.c
index e3c68a97678..9580370e7d7 100644
--- a/libavcodec/aacdec_fixed.c
+++ b/libavcodec/aacdec_fixed.c
@@ -171,7 +171,11 @@ static void subband_scale(int *dst, int *src, int scale, int offset, int len)
s = offset - (s >> 2);
- if (s > 0) {
+ if (s > 31) {
+ for (i=0; i<len; i++) {
+ dst[i] = 0;
+ }
+ } else if (s > 0) {
round = 1 << (s-1);
for (i=0; i<len; i++) {
out = (int)(((int64_t)src[i] * c) >> 32);
--
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