From: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Date: Sat, 27 Jun 2015 15:50:56 +0000 (+0200)
Subject: nutdec: check maxpos in read_sm_data before returning success
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=6b9fdf7f4f07926557048070cc2af3cfd0e3fe50;p=ffmpeg

nutdec: check maxpos in read_sm_data before returning success

Otherwise sm_size can be larger than size, which results in a negative
packet size.

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
---

diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 13fb39924d2..606deaa8380 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -1005,6 +1005,9 @@ static int read_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int
         AV_WL32(dst+4, skip_end);
     }
 
+    if (avio_tell(bc) >= maxpos)
+        return AVERROR_INVALIDDATA;
+
     return 0;
 }