<p>Hi,</p>
<p>Kamailio crashes when we handle a 302 redirect and the reply is a 404.</p>
<blockquote>
<h1>kamailio -v</h1>
<p>version: kamailio 4.4.4 (x86_64/linux)<br>
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES<br>
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB<br>
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.<br>
id: unknown<br>
compiled with gcc 4.9.2</p>
</blockquote>
<p>root@14cn5:/home/joel/files#</p>
<p>This works:</p>
<blockquote>
<p>softphone1 > kamailio1 > server1 > 302 > kamailio1 > server2 > 200 OK</p>
</blockquote>
<p>This crashes:</p>
<blockquote>
<p>softphone1 > kamailio1 > server1 > 302 > kamailio1 > server2 > 404 Not Found</p>
</blockquote>
<p>I'm attaching debug logs, sip traces and the bt full from backtrace.</p>
<p>IPs:</p>
<blockquote>
<p>A.B.C.D = Kamailio IP<br>
E.F.G.H = Softphone IP<br>
I.J.K.L1 = dispatcher node1<br>
I.J.K.L2 = dispatcher node2</p>
</blockquote>
<p>In the config we send INVITE requests to a dispatcher group (very simple config).</p>
<p>Then, in failure_route we have:</p>
<pre><code>    if (t_check_status("302")) {
        xlog("L_NOTICE", "Redirecting to TestName: $T_rpl($ct) - M=$rm R=$ru ID=$ci\n");
        get_redirects("*");
        route(RELAY);
    }
</code></pre>
<p>And call get redirected to the address of the contact in the 302.</p>
<p>If the new INVITE to that address gets a 200, all works, if that request gets a 404, Kamailio crashes.</p>
<p>Please let me know if you need more info, this is 100% reproducible on our platform.</p>
<p>Thank you!<br>
Joel.</p>
<p><a href="https://github.com/kamailio/kamailio/files/623307/backtrace.txt">backtrace.txt</a><br>
<a href="https://github.com/kamailio/kamailio/files/623308/debug.txt">debug.txt</a><br>
<a href="https://github.com/kamailio/kamailio/files/623309/sip.txt">sip.txt</a></p>

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