From aa180169961b46cf0d2bcc23cb686f93c079b256 Mon Sep 17 00:00:00 2001
From: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Date: Tue, 5 Jan 2016 13:20:11 +0100
Subject: [PATCH] asfdec_o: reject size > INT64_MAX in asf_read_unknown
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Both avio_skip and detect_unknown_subobject use int64_t for the size
parameter.

This fixes a segmentation fault due to infinite recursion.

Reviewed-by: Alexandra Hájková <alexandra.khirnova@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
---
 libavformat/asfdec_o.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/asfdec_o.c b/libavformat/asfdec_o.c
index 79b9ee43cc..02809bb435 100644
--- a/libavformat/asfdec_o.c
+++ b/libavformat/asfdec_o.c
@@ -178,6 +178,9 @@ static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
     uint64_t size   = avio_rl64(pb);
     int ret;
 
+    if (size > INT64_MAX)
+        return AVERROR_INVALIDDATA;
+
     if (asf->is_header)
         asf->unknown_size = size;
     asf->is_header = 0;