From eb5765e96a70b19ff75f9ee18c988346b4fc48c1 Mon Sep 17 00:00:00 2001
From: reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sun, 12 Dec 2010 11:45:47 +0000
Subject: stream.h: check against huge negative values in stream_seek()

Add validity check for stream_seek argument to avoid a integer
overflow for huge negative values that would break the internal state
of the stream buffer.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32702 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 stream/stream.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'stream')

diff --git a/stream/stream.h b/stream/stream.h
index 021296b247..cad61d3256 100644
--- a/stream/stream.h
+++ b/stream/stream.h
@@ -295,6 +295,10 @@ inline static int stream_seek(stream_t *s,off_t pos){
 
   mp_dbg(MSGT_DEMUX, MSGL_DBG3, "seek to 0x%qX\n",(long long)pos);
 
+  if (pos < 0) {
+    mp_msg(MSGT_DEMUX, MSGL_ERR, "Invalid seek to negative position!\n");
+    pos = 0;
+  }
   if(pos<s->pos){
     off_t x=pos-(s->pos-s->buf_len);
     if(x>=0){
-- 
cgit v1.2.3