From d4bc7fc412bad5ef1cb6554685d4920acb4303f4 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 23 Jul 2017 16:52:47 +0200 Subject: [PATCH] avcodec/aacdec_fixed: fix: left shift of negative value -1 Fixes: 2699/clusterfuzz-testcase-minimized-5631303862976512 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 2dfb8c417891e0cc3670f8e0791ea0c7071314fe) Signed-off-by: Michael Niedermayer --- libavcodec/aacdec_fixed.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/aacdec_fixed.c b/libavcodec/aacdec_fixed.c index 343425ae8d..edb5dc4133 100644 --- a/libavcodec/aacdec_fixed.c +++ b/libavcodec/aacdec_fixed.c @@ -430,7 +430,7 @@ static void apply_independent_coupling_fixed(AACContext *ac, else { for (i = 0; i < len; i++) { tmp = (int)(((int64_t)src[i] * c + (int64_t)0x1000000000) >> 37); - dest[i] += tmp << shift; + dest[i] += tmp * (1 << shift); } } }