From c23d5261f79671a598f32be8bc403552891af24e Mon Sep 17 00:00:00 2001
From: Laurent Aimar <fenrir@videolan.org>
Date: Sat, 1 Oct 2011 00:44:54 +0200
Subject: [PATCH] Check for corrupted data in avs demuxer.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 1cce7def0a8eff2e7db294b7d195a0fb1a5043b0)
---
 libavformat/avs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/avs.c b/libavformat/avs.c
index 355ae31f35..83023790d6 100644
--- a/libavformat/avs.c
+++ b/libavformat/avs.c
@@ -163,6 +163,8 @@ static int avs_read_packet(AVFormatContext * s, AVPacket * pkt)
             sub_type = avio_r8(s->pb);
             type = avio_r8(s->pb);
             size = avio_rl16(s->pb);
+            if (size < 4)
+                return AVERROR_INVALIDDATA;
             avs->remaining_frame_size -= size;
 
             switch (type) {