I am running into a situation where the nathelper module is causing openser/kamailio to crash.  The crash occurs when opensbc sends and invite to openser with an extra CR in the message body.  I already contacted the opensbc folks about this.  I just wanted you all to be aware that this could cause serious service interruptions.

Error log:

kernel: [599650.771067] kamailio[25461]: segfault at 18 ip b7a0a6c7 sp bfbaaa70 error 4 in nathelper.so[b79f7000+18000]

Sample invite sent to kamailio.. Please look at the extra CR/LF after Supported.  The nathelper module crashes after this.

                INVITE sip:phonenumber@chgw.commx.net SIP/2.0

                From: "South Test" <sip:phonenumber@orig.domain.com;user=phone>;tag=392385664-1238777567965-

                To:  <sip:phonenumber@chgw.commx.net>

                Via: SIP/2.0/UDP opensbc:5060;branch=z9hG4bKdec1a187dd1ede1193b6b6f3163a7dda;uas-addr=openser;rport

                CSeq: 913493359 INVITE

                Call-ID: BW1252479650304091860611707@orig.domain.com-0x000a

                Contact: <sip:+18135146513@opensbc>

                Max-Forwards: 9

                Accept: multipart/mixed, application/dtmf-relay, application/media_control+xml, application/sdp

                Allow: ACK, BYE, CANCEL, INFO, INVITE, OPTIONS, PRACK, REFER, NOTIFY, UPDATE

                Proxy-Require: privacy

                Supported: 100rel

                Content-Type: application/sdp

                Content-Length: 214

                v=0

                o=BroadWorks 3675 1 IN IP4 gw1.domain.com

                s=-

                c=IN IP4 opensbc

                t=0 0

                m=audio 10074 RTP/AVP 18 0 101

                a=rtpmap:18 G729/8000

                a=fmtp:18 annexb=no

                a=rtpmap:0 PCMU/8000

                a=rtpmap:101 telephone-event/8000