PANIC: gwlib/list.c:502: lock: Assertion `list != NULL' failed.

Hi,

Last night I noticed my wapbox's are restarting rather frequently
(sometimes...).  I enabled DEBUG logging, and here is a couple of
samples.  How do I go about finding out why this happens?  Maybe this
is enough information to point someone else towards an answer?

Running:
- INFO: Kannel wapbox version cvs-20051117 starting up.
- Linux wapgw 2.6.11-1.1369_FC4smp #1 SMP Thu Jun 2 23:08:39 EDT 2005
i686 i686 i386 GNU/Linux

2006-01-16 04:25:26 [6284] [8] DEBUG: Normalizing charset from UTF-8
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: machine 0x96e98e0, state
CONNECTED, event S-MethodResult.req
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: method 848, state
PROCESSING, event S-MethodResult.req
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: Mapping
`application/xhtml+xml', WSP 1.2 to 0xffffffff.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: Mapping `Date', WSP 1.2 to 0x0012.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: Mapping `Server', WSP 1.2 to 0x0026.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: Mapping `Content-Type', WSP
1.2 to 0x0011.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: Mapping `X-Cache', WSP 1.2
to 0xffffffff.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: Mapping `Proxy-Connection',
WSP 1.2 to 0xffffffff.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP 84/848: New method state REPLYING
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: resp_machine 848, state
RESULT_WAIT, event TR-Result.req.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP 84: New state CONNECTED
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: begin_sar_result(): data len = 4260
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: dispath_to_wdp(): psn = 0
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: dispath_to_wdp(): psn = 1
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: dispath_to_wdp(): psn = 2
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP 848: New state RESULT_RESP_WAIT
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: Created WTPRespMachine
0x96f2e68 (849)
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: resp_machine 849, state
LISTEN, event RcvInvoke.
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP 849: New state LISTEN
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: Destroying WTPRespMachine
0x96f2e68 (849)
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: machine 0x96e98e0, state
CONNECTED, event TR-Invoke.ind
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP: method 848, state REPLYING,
event Abort
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: resp_machine 848, state
RESULT_RESP_WAIT, event TR-Abort.req.
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP 84/848: New method state NULL_METHOD
2006-01-16 04:25:26 [6284] [2] DEBUG: Destroying WSPMethodMachine 848
2006-01-16 04:25:26 [6284] [2] DEBUG: WSP 84: New state NULL_SESSION
2006-01-16 04:25:26 [6284] [2] DEBUG: Destroying WSPMachine 0x96e98e0
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP 848: New state LISTEN
2006-01-16 04:25:26 [6284] [6] DEBUG: WTP: Destroying WTPRespMachine
0x97175e0 (848)
2006-01-16 04:25:26 [6284] [0] PANIC: gwlib/list.c:502: lock:
Assertion `list != NULL' failed.
2006-01-16 04:25:26 [6284] [0] PANIC:
/usr/local/sbin/wapbox(gw_panic+0x16b) [0x80cff9e]
2006-01-16 04:25:26 [6284] [0] PANIC: /usr/local/sbin/wapbox [0x80ceea8]
2006-01-16 04:25:26 [6284] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_append+0x11) [0x80ce300]
2006-01-16 04:25:26 [6284] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_produce+0x14) [0x80ceb96]
2006-01-16 04:25:26 [6284] [0] PANIC:
/usr/local/sbin/wapbox(wtp_initiator_dispatch_event+0x17) [0x80a6312]
2006-01-16 04:25:26 [6284] [0] PANIC:
/usr/local/sbin/wapbox(wap_dispatch_datagram+0x11c) [0x80843f4]
2006-01-16 04:25:26 [6284] [0] PANIC:
/usr/local/sbin/wapbox(main+0x452) [0x805a699]
2006-01-16 04:25:26 [6284] [0] PANIC:
/lib/libc.so.6(__libc_start_main+0xc6) [0x2b6de6]
2006-01-16 04:25:26 [6284] [0] PANIC: /usr/local/sbin/wapbox [0x8058a81]

2006-01-16 05:55:03 [8773] [6] DEBUG: WTP: resp_machine 6, state
RESULT_RESP_WAIT, event RcvAck.
2006-01-16 05:55:03 [8773] [6] DEBUG: WTP: continue_sar_result():
lsegm=2, nsegm=10, csegm=-1
2006-01-16 05:55:03 [8773] [6] DEBUG: WTP: dispath_to_wdp(): psn = 3
2006-01-16 05:55:03 [8773] [6] DEBUG: WTP: dispath_to_wdp(): psn = 4
2006-01-16 05:55:03 [8773] [6] DEBUG: WTP: dispath_to_wdp(): psn = 5
2006-01-16 05:55:03 [8773] [6] DEBUG: WTP 6: New state RESULT_RESP_WAIT
2006-01-16 05:55:04 [8773] [0] PANIC: gwlib/list.c:502: lock:
Assertion `list != NULL' failed.
2006-01-16 05:55:04 [8773] [0] PANIC:
/usr/local/sbin/wapbox(gw_panic+0x16b) [0x80cff9e]
2006-01-16 05:55:04 [8773] [0] PANIC: /usr/local/sbin/wapbox [0x80ceea8]
2006-01-16 05:55:04 [8773] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_append+0x11) [0x80ce300]
2006-01-16 05:55:04 [8773] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_produce+0x14) [0x80ceb96]
2006-01-16 05:55:04 [8773] [0] PANIC:
/usr/local/sbin/wapbox(wtp_initiator_dispatch_event+0x17) [0x80a6312]
2006-01-16 05:55:04 [8773] [0] PANIC:
/usr/local/sbin/wapbox(wap_dispatch_datagram+0x11c) [0x80843f4]
2006-01-16 05:55:04 [8773] [0] PANIC:
/usr/local/sbin/wapbox(main+0x452) [0x805a699]
2006-01-16 05:55:04 [8773] [0] PANIC:
/lib/libc.so.6(__libc_start_main+0xc6) [0x2b6de6]
2006-01-16 05:55:04 [8773] [0] PANIC: /usr/local/sbin/wapbox [0x8058a81]

2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: machine 0x995e270, state
CONNECTED, event S-MethodResult.req
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: method 301, state
PROCESSING, event S-MethodResult.req
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `text/html', WSP
1.2 to 0x0002.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `Server', WSP 1.2 to 0x0026.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `Date', WSP 1.2 to 0x0012.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `X-Powered-By', WSP
1.2 to 0xffffffff.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `Location', WSP 1.2
to 0x001c.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `Content-Length',
WSP 1.2 to 0x000d.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `Content-Type', WSP
1.2 to 0x0011.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `Cache-Control',
WSP 1.2 to 0x0008.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `X-Cache', WSP 1.2
to 0xffffffff.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `Proxy-Connection',
WSP 1.2 to 0xffffffff.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP: Mapping `X-WAP.TOD', WSP
1.2 to 0xffffffff.
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP 51/301: New method state REPLYING
2006-01-16 06:02:48 [8867] [2] DEBUG: WSP 51: New state CONNECTED
2006-01-16 06:02:48 [8867] [6] DEBUG: WTP: resp_machine 301, state
RESULT_WAIT, event TR-Result.req.
2006-01-16 06:02:48 [8867] [6] DEBUG: WTP: begin_sar_result(): data len = 300
2006-01-16 06:02:48 [8867] [6] DEBUG: WTP: dispath_to_wdp(): psn = 0
2006-01-16 06:02:48 [8867] [6] DEBUG: WTP 301: New state RESULT_RESP_WAIT
2006-01-16 06:02:48 [8867] [0] PANIC: gwlib/list.c:502: lock:
Assertion `list != NULL' failed.
2006-01-16 06:02:48 [8867] [0] PANIC:
/usr/local/sbin/wapbox(gw_panic+0x16b) [0x80cff9e]
2006-01-16 06:02:48 [8867] [0] PANIC: /usr/local/sbin/wapbox [0x80ceea8]
2006-01-16 06:02:48 [8867] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_append+0x11) [0x80ce300]
2006-01-16 06:02:48 [8867] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_produce+0x14) [0x80ceb96]
2006-01-16 06:02:48 [8867] [0] PANIC:
/usr/local/sbin/wapbox(wtp_initiator_dispatch_event+0x17) [0x80a6312]
2006-01-16 06:02:48 [8867] [0] PANIC:
/usr/local/sbin/wapbox(wap_dispatch_datagram+0x11c) [0x80843f4]
2006-01-16 06:02:48 [8867] [0] PANIC:
/usr/local/sbin/wapbox(main+0x452) [0x805a699]
2006-01-16 06:02:48 [8867] [0] PANIC:
/lib/libc.so.6(__libc_start_main+0xc6) [0x2b6de6]
2006-01-16 06:02:48 [8867] [0] PANIC: /usr/local/sbin/wapbox [0x8058a81]

2006-01-16 06:24:20 [9006] [5] DEBUG: Timeout-R elapsed.
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: resp_machine 1334, state
RESULT_RESP_WAIT, event Timeout-R.
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP 1334: New state RESULT_RESP_WAIT
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: Created WTPRespMachine
0x9072d88 (1375)
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: resp_machine 1375, state
LISTEN, event RcvInvoke.
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP 1375: New state LISTEN
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: Destroying WTPRespMachine
0x9072d88 (1375)
2006-01-16 06:24:20 [9006] [2] DEBUG: WSP: machine 0x9060f48, state
CONNECTED, event TR-Invoke.ind
2006-01-16 06:24:20 [9006] [2] DEBUG: WSP: method 1334, state
REPLYING, event Abort
2006-01-16 06:24:20 [9006] [2] DEBUG: WSP 107/1334: New method state NULL_METHOD
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: resp_machine 1334, state
RESULT_RESP_WAIT, event TR-Abort.req.
2006-01-16 06:24:20 [9006] [2] DEBUG: Destroying WSPMethodMachine 1334
2006-01-16 06:24:20 [9006] [2] DEBUG: WSP 107: New state NULL_SESSION
2006-01-16 06:24:20 [9006] [2] DEBUG: Destroying WSPMachine 0x9060f48
2006-01-16 06:24:20 [9006] [2] DEBUG: cookie_destroy: Destroyed cookie
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP 1334: New state LISTEN
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: Destroying WTPRespMachine
0x9083980 (1334)
2006-01-16 06:24:20 [9006] [2] DEBUG: cookie_destroy: Destroyed cookie
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: resp_machine 1361, state
RESULT_RESP_WAIT, event RcvAck.
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: continue_sar_result():
lsegm=11, nsegm=12, csegm=8
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP: dispath_to_wdp(): psn = 12
2006-01-16 06:24:20 [9006] [6] DEBUG: WTP 1361: New state RESULT_RESP_WAIT
2006-01-16 06:24:21 [9006] [6] DEBUG: WTP: Created WTPRespMachine
0xb0cb1028 (1376)
2006-01-16 06:24:21 [9006] [6] DEBUG: WTP: resp_machine 1376, state
LISTEN, event RcvInvoke.
2006-01-16 06:24:21 [9006] [6] DEBUG: WTP 1376: New state INVOKE_RESP_WAIT
2006-01-16 06:24:21 [9006] [2] DEBUG: WSP: machine 0xb0c41380, state
CONNECTED, event TR-Invoke.ind
2006-01-16 06:24:21 [9006] [2] DEBUG: WSP: method 1376, state
NULL_METHOD, event TR-Invoke.ind
2006-01-16 06:24:21 [9006] [2] DEBUG: WSP 94/1376: New method state HOLDING
2006-01-16 06:24:21 [9006] [2] DEBUG: WSP: method 1376, state HOLDING,
event Release
2006-01-16 06:24:21 [9006] [2] DEBUG: WSP 94/1376: New method state REQUESTING
2006-01-16 06:24:21 [9006] [2] DEBUG: WSP 94: New state CONNECTED
2006-01-16 06:24:21 [9006] [5] DEBUG: Timeout-R elapsed.
2006-01-16 06:24:21 [9006] [6] DEBUG: WTP: resp_machine 1335, state
RESULT_RESP_WAIT, event Timeout-R.
2006-01-16 06:24:21 [9006] [6] DEBUG: WTP 1335: New state RESULT_RESP_WAIT
2006-01-16 06:24:21 [9006] [0] PANIC: gwlib/list.c:502: lock:
Assertion `list != NULL' failed.
2006-01-16 06:24:22 [9006] [0] PANIC:
/usr/local/sbin/wapbox(gw_panic+0x16b) [0x80cff9e]
2006-01-16 06:24:22 [9006] [0] PANIC: /usr/local/sbin/wapbox [0x80ceea8]
2006-01-16 06:24:22 [9006] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_append+0x11) [0x80ce300]
2006-01-16 06:24:22 [9006] [0] PANIC:
/usr/local/sbin/wapbox(gwlist_produce+0x14) [0x80ceb96]
2006-01-16 06:24:22 [9006] [0] PANIC:
/usr/local/sbin/wapbox(wtp_initiator_dispatch_event+0x17) [0x80a6312]
2006-01-16 06:24:22 [9006] [0] PANIC:
/usr/local/sbin/wapbox(wap_dispatch_datagram+0x11c) [0x80843f4]
2006-01-16 06:24:22 [9006] [0] PANIC:
/usr/local/sbin/wapbox(main+0x452) [0x805a699]
2006-01-16 06:24:22 [9006] [0] PANIC:
/lib/libc.so.6(__libc_start_main+0xc6) [0x2b6de6]
2006-01-16 06:24:22 [9006] [0] PANIC: /usr/local/sbin/wapbox [0x8058a81]