From 74ef8b434d8d8ef02bee6a5394da849136ed1bf1 Mon Sep 17 00:00:00 2001
From: Eric Paul <[eric.paul@gmail.com>
Date: Thu, 5 Jul 2007 20:58:34 +0000
Subject: check udp_read_packet return value not to access uninitialized memory
 patch by Eric Paul: [eric paul gmail com] original thread: [FFmpeg-devel]
 [PATCH] : libavformat segfault when a RTSP reading is interrupted date:
 07/05/2007 03:13 PM

Originally committed as revision 9492 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/rtsp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libavformat/rtsp.c')

diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 3a3ffbd13d..2607fe0409 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -1194,7 +1194,7 @@ static int rtsp_read_packet(AVFormatContext *s,
     case RTSP_PROTOCOL_RTP_UDP:
     case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
         len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
-        if (rtsp_st->rtp_ctx)
+        if (len >=0 && rtsp_st->rtp_ctx)
             rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
         break;
     }
-- 
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