From 0ee143558d55b590774dba69cff5a16eda089a4d Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Fri, 15 Dec 2017 18:17:13 +0100
Subject: [PATCH] avcodec/hevc_cabac: Fix integer overflow in
ff_hevc_cu_qp_delta_abs()
Fixes: signed integer overflow: 2147483647 + 1073741824 cannot be represented in type 'int'
Fixes: 4555/clusterfuzz-testcase-minimized-4505532481142784
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_cabac.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavcodec/hevc_cabac.c b/libavcodec/hevc_cabac.c
index 853fd3f7229..5b5da1165a7 100644
--- a/libavcodec/hevc_cabac.c
+++ b/libavcodec/hevc_cabac.c
@@ -646,8 +646,10 @@ int ff_hevc_cu_qp_delta_abs(HEVCContext *s)
suffix_val += 1 << k;
k++;
}
- if (k == CABAC_MAX_BIN)
+ if (k == CABAC_MAX_BIN) {
av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", k);
+ return AVERROR_INVALIDDATA;
+ }
while (k--)
suffix_val += get_cabac_bypass(&s->HEVClc->cc) << k;
--
GitLab