FreeBSD: php-fpm `child exited on signal 11 (SIGSEGV)`

[basbebe]

Hi!

I keep getting crashes, though I don't know if it's a bug or a misconfiguration in PHP-FPM, NGINX or Z-Push. I'm on FreeBSD in a jail.

The line I keep getting in my PHP-FPM logs is:

[04-Jan-2016 20:49:43.599789] WARNING: pid 23055, fpm_children_bury(), line 252: [pool www] child 23173 exited on signal 11 (SIGSEGV) after 363.538588 seconds from start

Here is an excerpt of one of my logs:

=> /var/log/php-fpm.log <==
[04-Jan-2016 20:49:42.207965] DEBUG: pid 23055, fpm_pctl_perform_idle_server_maintenance(), line 362: [pool www] currently 1 active children, 0 spare children
[04-Jan-2016 20:49:43.250049] DEBUG: pid 23055, fpm_pctl_perform_idle_server_maintenance(), line 362: [pool www] currently 1 active children, 0 spare children

==> /var/log/z-push/z-push.log <==
04/01/2016 20:49:43 [23173] [ INFO] [[email protected]] ExportChangesDiff->InitializeExporter(): Found '1' changes for 'f342e2c2'
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] SyncCollections->CheckForChanges(): Using ChangesSink but found relevant changes on regular export
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] WBXMLEncoder->startWBXML() type: vnd.ms-sync.wbxml
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] WBXMLEncoder->endTag() WBXML output completed
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] Flushing 27, headers already sent? no
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] BackendIMAP->close_connection(): disconnected from IMAP server
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] FileStateMachine->SetState() written 747 bytes on file: '/usr/local/lib/z-push/k/7/vra7la9o317nf6lq0hsookk77k-bs-1451321984'
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] LoopDetection->ProcessLoopDetectionTerminate()
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] Memory usage information: 5529808/6029312 - Execution time: 3.0348 - HTTP responde code: 200
04/01/2016 20:49:43 [23173] [DEBUG] [[email protected]] -------- End

==> /var/log/php-fpm.log <==
[04-Jan-2016 20:49:43.599647] DEBUG: pid 23055, fpm_got_signal(), line 76: received SIGCHLD
[04-Jan-2016 20:49:43.599789] WARNING: pid 23055, fpm_children_bury(), line 252: [pool www] child 23173 exited on signal 11 (SIGSEGV) after 363.538588 seconds from start
[04-Jan-2016 20:49:43.602016] NOTICE: pid 23055, fpm_children_make(), line 421: [pool www] child 23233 started
[04-Jan-2016 20:49:43.602138] DEBUG: pid 23055, fpm_event_loop(), line 419: event module triggered 1 events
[04-Jan-2016 20:49:44.273536] DEBUG: pid 23055, fpm_pctl_perform_idle_server_maintenance(), line 362: [pool www] currently 0 active children, 1 spare children
[04-Jan-2016 20:49:45.299640] DEBUG: pid 23055, fpm_pctl_perform_idle_server_maintenance(), line 362: [pool www] currently 0 active children, 1 spare children

Any hint is appreciated!