kamailio.log:

2016-06-23T10:10:33.983494+02:00 kam01 /usr/sbin/kamailio[2907]: NOTICE: dialog [dlg_hash.c:245]: dlg_clean_run(): dialog in delete state is too old (0x7f092e15b190 ref 3)
2016-06-23T10:10:34.005015+02:00 kam01 /usr/sbin/kamailio[2897]: WARNING: dialog [dlg_handlers.c:1348]: dlg_onroute(): inconsitent dlg timer data on dlg 0x7f092e15b190 [3554:5262] with clid 'L, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PU' and tags 'as6b8e8af9' 'as25960d84'
2016-06-23T10:10:34.007989+02:00 kam01 /usr/sbin/kamailio[2913]: CRITICAL: <core> [pass_fd.c:275]: receive_fd(): EOF on 17
2016-06-23T10:10:34.008119+02:00 kam01 /usr/sbin/kamailio[2823]: ALERT: <core> [main.c:739]: handle_sigs(): child process 2897 exited by a signal 11
2016-06-23T10:10:34.008128+02:00 kam01 /usr/sbin/kamailio[2823]: ALERT: <core> [main.c:742]: handle_sigs(): core was not generated

kern.log:

[363406.951756] kamailio[2897] general protection ip:7f092c9413a5 sp:7ffdd1065530 error:0 in dialog.so