From 6de33611c918e6ad5bbc878840a59607cb42b8c0 Mon Sep 17 00:00:00 2001
From: Laurent Aimar <fenrir@videolan.org>
Date: Fri, 30 Sep 2011 23:42:31 +0000
Subject: [PATCH] avsdemux: check for out of bound writes

Signed-off-by: Janne Grunau <janne-libav@jannau.net>
---
 libavformat/avs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/avs.c b/libavformat/avs.c
index 1c699fbf3c..cc0e849bc2 100644
--- a/libavformat/avs.c
+++ b/libavformat/avs.c
@@ -169,6 +169,8 @@ static int avs_read_packet(AVFormatContext * s, AVPacket * pkt)
 
             switch (type) {
             case AVS_PALETTE:
+                if (size - 4 > sizeof(palette))
+                    return AVERROR_INVALIDDATA;
                 ret = avio_read(s->pb, palette, size - 4);
                 if (ret < size - 4)
                     return AVERROR(EIO);