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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
This commit is contained in:
Eric Paul 2007-07-05 20:58:34 +00:00 committed by Benoit Fouet
parent 3caffb7d80
commit 74ef8b434d

View File

@ -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;
}