Hi,

Kamailio crashes when we handle a 302 redirect and the reply is a 404.

# kamailio -v version: kamailio 4.4.4 (x86_64/linux) 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 ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 4.9.2

root@14cn5:/home/joel/files#

This works:

softphone1 > kamailio1 > server1 > 302 > kamailio1 > server2 > 200 OK

This crashes:

softphone1 > kamailio1 > server1 > 302 > kamailio1 > server2 > 404 Not Found

I'm attaching debug logs, sip traces and the bt full from backtrace.

IPs:

A.B.C.D = Kamailio IP E.F.G.H = Softphone IP I.J.K.L1 = dispatcher node1 I.J.K.L2 = dispatcher node2

In the config we send INVITE requests to a dispatcher group (very simple config).

Then, in failure_route we have:

``` 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); } ```

And call get redirected to the address of the contact in the 302.

If the new INVITE to that address gets a 200, all works, if that request gets a 404, Kamailio crashes.

Please let me know if you need more info, this is 100% reproducible on our platform.

Thank you! Joel.

[backtrace.txt](https://github.com/kamailio/kamailio/files/623307/backtrace.txt) [debug.txt](https://github.com/kamailio/kamailio/files/623308/debug.txt) [sip.txt](https://github.com/kamailio/kamailio/files/623309/sip.txt)