From d7b3d5c3f2e2ff1994762b5e09c05fbc33790b5b Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Tue, 20 Jun 2017 14:38:34 +0200
Subject: [PATCH] avcodec/hevc_filter: Fix invalid shift
Fixes: runtime error: left shift of negative value -1
Fixes: 2299/clusterfuzz-testcase-minimized-4843509351710720
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/hevc_filter.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/hevc_filter.c b/libavcodec/hevc_filter.c
index 14e7c8dd503..b53f4cc7212 100644
--- a/libavcodec/hevc_filter.c
+++ b/libavcodec/hevc_filter.c
@@ -470,7 +470,7 @@ static int get_pcm(HEVCContext *s, int x, int y)
#define TC_CALC(qp, bs) \
tctable[av_clip((qp) + DEFAULT_INTRA_TC_OFFSET * ((bs) - 1) + \
- (tc_offset >> 1 << 1), \
+ (tc_offset & -2), \
0, MAX_QP + DEFAULT_INTRA_TC_OFFSET)]
static void deblocking_filter_CTB(HEVCContext *s, int x0, int y0)
--
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