From 98e177c7288574b336d80618f4ec5d1f94243070 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AD=99=E6=B5=A9=20and=20=E5=BC=A0=E6=B4=AA=E4=BA=AE=28?=
 =?UTF-8?q?=E6=9C=9B=E5=88=9D=29?= <tony.sh and wangchu.zhl@alibaba-inc.com>
Date: Fri, 25 Aug 2017 01:15:27 +0200
Subject: [PATCH] avformat/cinedec: Fix DoS due to lack of eof check

Fixes: loop.cine

Found-by: Xiaohei and Wangchu from Alibaba Security Team
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7e80b63ecd259d69d383623e75b318bf2bd491f6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/cinedec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git libavformat/cinedec.c libavformat/cinedec.c
index 32cccf566b4..c615d4fc497 100644
--- external/FFmpeg/libavformat/cinedec.c
+++ external/FFmpeg/libavformat/cinedec.c
@@ -267,8 +267,12 @@ static int cine_read_header(AVFormatContext *avctx)
 
     /* parse image offsets */
     avio_seek(pb, offImageOffsets, SEEK_SET);
-    for (i = 0; i < st->duration; i++)
+    for (i = 0; i < st->duration; i++) {
+        if (avio_feof(pb))
+            return AVERROR_INVALIDDATA;
+
         av_add_index_entry(st, avio_rl64(pb), i, 0, 0, AVINDEX_KEYFRAME);
+    }
 
     return 0;
 }
