Gracefully handle malformed RTP text packets.

AST-2009-004

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@209235 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_rtp_asterisk.c b/res/res_rtp_asterisk.c
index edf1d72..d281fa5 100644 (file)
--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -2078,6 +2078,9 @@ static struct ast_frame *ast_rtp_read(struct ast_rtp_instance *instance, int rtc
 
                rtp->f.subclass = AST_FORMAT_T140;
                header_end = memchr(data, ((*data) & 0x7f), rtp->f.datalen);
+               if (header_end == NULL) {
+                       return &ast_null_frame;
+               }
                header_end++;
 
                header_length = header_end - data;