Confirmed, I'm getting crash too.

On Thursday 26 November 2015 13:05:57 Jayesh Nambiar wrote:
> Hi,
> I am trying to extract out the expires value from the incoming REGISTER
> request. It might be present in the Contact header or as a separate Expires
> header and hence I planned to use the $expires(max) PV to get this. But
> kamailio just crashes as soon as I use the variable. Here's when it crashes:
>
> if(is_method("REGISTER")) {
>      xlog("L_INFO", "Expires is $expires(max)");
>      if(!save("location", "0x01")) {
> t_reply("500", "Error while saving AOR");
>      }
> }
>
> It crashes at the xlog point. Here's the backtrace for reference:
> Reading symbols from /usr/local/kamailio/sbin/kamailio...done.
> [New LWP 16609]
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> Core was generated by `/usr/local/kamailio/sbin/kamailio -P
> /var/run/kamailio.pid -f /usr/local/kamail'.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  0x00007f34b658b311 in pv_get_expires (msg=0x7f34bd879e58,
> param=0x7f34bd7e9220, res=0x7ffcf67af530) at pv_core.c:3060
> 3060 if(c->expires && c->expires->body.len) {
> (gdb) backtrace
> #0  0x00007f34b658b311 in pv_get_expires (msg=0x7f34bd879e58,
> param=0x7f34bd7e9220, res=0x7ffcf67af530) at pv_core.c:3060
> #1  0x00000000004fb6e1 in pv_get_spec_value (msg=0x7f34bd879e58,
> sp=0x7f34bd7e9208, value=0x7ffcf67af530) at pvapi.c:1304
> #2  0x00000000004fbb46 in pv_printf (msg=0x7f34bd879e58,
> list=0x7f34bd80ef38, buf=0x7f34bd8735a0 "Expires is ", len=0x7ffcf67af618)
> at pvapi.c:1363
> #3  0x00007f34b67ea745 in xl_print_log (msg=0x7f34bd879e58,
> list=0x7f34bd80ef38, buf=0x7f34bd8735a0 "Expires is ", len=0x7ffcf67af618)
> at xl_lib.c:37
> #4  0x00007f34b67eb0f9 in xlog_helper (msg=0x7f34bd879e58,
> xm=0x7f34bd808648, level=2, line=0, facility=-1) at xlog.c:215
> #5  0x00007f34b67ec160 in xlog_2_helper (msg=0x7f34bd879e58,
> lev=0x7f34bd7e9130 "", frm=0x7f34bd808648 "84\177", mode=0, facility=-1)
> at xlog.c:284
> #6  0x00007f34b67ec19c in xlog_2 (msg=0x7f34bd879e58, lev=0x7f34bd7e9130
> "", frm=0x7f34bd808648 "84\177") at xlog.c:292
> #7  0x000000000041e23b in do_action (h=0x7ffcf67b0b40, a=0x7f34bd817cd0,
> msg=0x7f34bd879e58) at action.c:1065
> #8  0x000000000042a8e7 in run_actions (h=0x7ffcf67b0b40, a=0x7f34bd813e18,
> msg=0x7f34bd879e58) at action.c:1548
> #9  0x000000000041ab16 in do_action (h=0x7ffcf67b0b40, a=0x7f34bd7e8738,
> msg=0x7f34bd879e58) at action.c:677
> #10 0x000000000042a8e7 in run_actions (h=0x7ffcf67b0b40, a=0x7f34bd7e8738,
> msg=0x7f34bd879e58) at action.c:1548
> #11 0x000000000041e094 in do_action (h=0x7ffcf67b0b40, a=0x7f34bd7e89c8,
> msg=0x7f34bd879e58) at action.c:1044
> #12 0x000000000042a8e7 in run_actions (h=0x7ffcf67b0b40, a=0x7f34bd7e19d8,
> msg=0x7f34bd879e58) at action.c:1548
> #13 0x000000000042b04d in run_top_route (a=0x7f34bd7e19d8,
> msg=0x7f34bd879e58, c=0x0) at action.c:1634
> #14 0x000000000050f3d4 in receive_msg (
>     buf=0xa80c00 <buf> "REGISTER sip:devsip.tlkn.com SIP/2.0\r\nVia:
> SIP/2.0/UDP
> 203.153.53.145:8300;branch=z9hG4bK119a.e23ed10b856f38b41c93d1d259d8869f.0;i
> =b1\r\nVia: SIP/2.0/TCP
> 172.16.16.32:52358;rport=52359;received=203.153."..., len=712,
> rcv_info=0x7ffcf67b0e60) at receive.c:196
> #15 0x0000000000613b9e in udp_rcv_loop () at udp_server.c:495
> #16 0x00000000004aa119 in main_loop () at main.c:1577
> #17 0x00000000004b0e1e in main (argc=5, argv=0x7ffcf67b1318) at main.c:2553
>
> Thanks,
>
> - Jayesh

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