[asterisk-bugs] [JIRA] (ASTERISK-22823) Asterisk 12-beta @r402448 pjsip sigsegv receiving SIP MESSAGE when checking Contact header

[Matt Jordan (JIRA)]

Matt Jordan created ASTERISK-22823:
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             Summary: Asterisk 12-beta @r402448 pjsip sigsegv receiving SIP MESSAGE when checking Contact header
                 Key: ASTERISK-22823
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22823
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_pjsip_messaging
    Affects Versions: 12.0.0-beta1
         Environment: Fedora 19 x86_64, compiled Asterisk and PJSIP from source.
            Reporter: Anthony Messina


Asterisk dumps core when receiving a PJSIP SIP MESSAGE from a CSipCimple client.  The issue appears when Asterisk attempts to check for a Contact header in the incoming MESSAGE (in res/res_pjsip_messaging.c):
{code}
        /* contact header */
        if ((size = pjsip_hdr_print_on(pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CONTACT, NULL), buf, sizeof(buf)-1)) > 0) {
                buf[size] = '\0';
                CHECK_RES(ast_msg_set_var(msg, "SIP_FULLCONTACT", buf));
        }
{code}

It may well be that CSipSimple is sending a bad Contact header, but it shouldn't cause Asterisk/PJSIP to bail.  I am contacting the CSipSimple developers to ask about their Contact header.

If I replace the above snippet with the following, SIP MESSAGEs are processed properly (though I don't know C and I'm not sure this will do what it's supposed to):

{code}
        /* new contact header */
        pjsip_contact_hdr *contact_hdr;
        contact_hdr = (pjsip_contact_hdr*)
                pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CONTACT, NULL);
        if (contact_hdr) {
                buf[size] = '\0';
                CHECK_RES(ast_msg_set_var(msg, "SIP_FULLCONTACT", buf));
        }
{code}


I will attach a backtrace showing the problem.

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