v6.3.3 FTL Crashing Segmentation fault

[benr75]

Have had 0 issues until recent release. This is 2nd crash in a couple days

Versions

Docker Tag 2025.11.0
Core v6.2.2
FTL v6.3.3
Web interface v6.3

Platform

Docker on Synology NAS

Crash log

2025-11-08 01:26:48.219 MST [68/T112] INFO: Time offset: 2.925793e-01 ms (excluded 2 outliers)
2025-11-08 01:26:48.219 MST [68/T112] INFO: Round-trip delay: 2.825411e+01 ms (excluded 2 outliers)
2025-11-08 02:26:48.772 MST [68/T112] INFO: Received 8/8 valid NTP replies from pool.ntp.org
2025-11-08 02:26:48.773 MST [68/T112] INFO: Time offset: 6.933272e+00 ms (excluded 0 outliers)
2025-11-08 02:26:48.773 MST [68/T112] INFO: Round-trip delay: 5.731821e+01 ms (excluded 0 outliers)
2025-11-08 03:26:49.199 MST [68/T112] INFO: Received 8/8 valid NTP replies from pool.ntp.org
2025-11-08 03:26:49.199 MST [68/T112] INFO: Time offset: 2.395689e+00 ms (excluded 0 outliers)
2025-11-08 03:26:49.232 MST [68/T112] INFO: Round-trip delay: 4.276168e+01 ms (excluded 0 outliers)
2025-11-08 04:26:49.560 MST [68/T112] INFO: Received 8/8 valid NTP replies from pool.ntp.org
2025-11-08 04:26:49.560 MST [68/T112] INFO: Time offset: 1.589864e+00 ms (excluded 0 outliers)
2025-11-08 04:26:49.560 MST [68/T112] INFO: Round-trip delay: 2.806705e+01 ms (excluded 0 outliers)
2025-11-08 05:26:50.080 MST [68/T112] INFO: Received 8/8 valid NTP replies from pool.ntp.org
2025-11-08 05:26:50.080 MST [68/T112] INFO: Time offset: 1.075380e+01 ms (excluded 1 outliers)
2025-11-08 05:26:50.080 MST [68/T112] INFO: Round-trip delay: 5.195502e+01 ms (excluded 1 outliers)
2025-11-08 06:26:51.196 MST [68/T112] INFO: Received 8/8 valid NTP replies from pool.ntp.org
2025-11-08 06:26:51.196 MST [68/T112] INFO: Time offset: 8.099973e-01 ms (excluded 0 outliers)
2025-11-08 06:26:51.196 MST [68/T112] INFO: Round-trip delay: 1.277136e+02 ms (excluded 0 outliers)
2025-11-08 07:26:50.687 MST [68/T112] INFO: Received 8/8 valid NTP replies from pool.ntp.org
2025-11-08 07:26:50.687 MST [68/T112] INFO: Time offset: 1.095939e+01 ms (excluded 1 outliers)
2025-11-08 07:26:50.687 MST [68/T112] INFO: Round-trip delay: 5.214684e+01 ms (excluded 1 outliers)
2025-11-08 08:26:51.058 MST [68/T112] INFO: Received 8/8 valid NTP replies from pool.ntp.org
2025-11-08 08:26:51.058 MST [68/T112] INFO: Time offset: 7.679462e-01 ms (excluded 1 outliers)
2025-11-08 08:26:51.058 MST [68/T112] INFO: Round-trip delay: 3.551435e+01 ms (excluded 1 outliers)
2025-11-08 08:39:00.216 MST [68/T113] INFO: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
2025-11-08 08:39:00.216 MST [68/T113] INFO: ---------------------------->  FTL crashed!  <----------------------------
2025-11-08 08:39:00.216 MST [68/T113] INFO: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
2025-11-08 08:39:00.216 MST [68/T113] INFO: Please report a bug at https://github.com/pi-hole/FTL/issues
2025-11-08 08:39:00.216 MST [68/T113] INFO: and include in your report already the following details:
2025-11-08 08:39:00.216 MST [68/T113] INFO: FTL has been running for 147915 seconds
2025-11-08 08:39:00.216 MST [68/T113] INFO: FTL branch: master
2025-11-08 08:39:00.216 MST [68/T113] INFO: FTL version: v6.3.3
2025-11-08 08:39:00.216 MST [68/T113] INFO: FTL commit: a0186fd4
2025-11-08 08:39:00.216 MST [68/T113] INFO: FTL date: 2025-11-04 20:18:48 +0100
2025-11-08 08:39:00.216 MST [68/T113] INFO: FTL user: started as root, ended as root
2025-11-08 08:39:00.216 MST [68/T113] INFO: Compiled for linux/amd64 (compiled on CI) using cc (Alpine 14.2.0) 14.2.0
2025-11-08 08:39:00.216 MST [68/T113] INFO: Process details: MID: 68
2025-11-08 08:39:00.216 MST [68/T113] INFO:                  PID: 68
2025-11-08 08:39:00.216 MST [68/T113] INFO:                  TID: 113
2025-11-08 08:39:00.216 MST [68/T113] INFO:                  Name: database
2025-11-08 08:39:00.216 MST [68/T113] INFO: Received signal: Segmentation fault
2025-11-08 08:39:00.216 MST [68/T113] INFO:      at address: 0x28
2025-11-08 08:39:00.216 MST [68/T113] INFO:      with code:  SEGV_MAPERR (Address not mapped to object)
2025-11-08 08:39:00.216 MST [68/T113] INFO: !!! INFO: pihole-FTL has not been compiled with glibc/backtrace support, not generating one !!!
2025-11-08 08:39:00.216 MST [68/T113] INFO: ------ Listing content of directory /dev/shm ------
2025-11-08 08:39:00.216 MST [68/T113] INFO: File Mode User:Group      Size  Filename
2025-11-08 08:39:00.216 MST [68/T113] INFO: rwxrwxrwx root:root       360   .
2025-11-08 08:39:00.216 MST [68/T113] INFO: rwxr-xr-x root:root       340   ..
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root       786K  FTL-68-recycler
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root       106K  FTL-68-dns-cache-lookup
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root        45K  FTL-68-domains-lookup
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root         4K  FTL-68-clients-lookup
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root       569K  FTL-68-fifo-log
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root         4K  FTL-68-per-client-regex
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root       737K  FTL-68-dns-cache
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root         8K  FTL-68-overTime
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root        11M  FTL-68-queries
2025-11-08 08:39:00.216 MST [68/T113] INFO: rw------- root:root        29K  FTL-68-upstreams
2025-11-08 08:39:00.217 MST [68/T113] INFO: rw------- root:root       348K  FTL-68-clients
2025-11-08 08:39:00.217 MST [68/T113] INFO: rw------- root:root       205K  FTL-68-domains
2025-11-08 08:39:00.217 MST [68/T113] INFO: rw------- root:root       246K  FTL-68-strings
2025-11-08 08:39:00.217 MST [68/T113] INFO: rw------- root:root       144   FTL-68-settings
2025-11-08 08:39:00.217 MST [68/T113] INFO: rw------- root:root       344   FTL-68-counters
2025-11-08 08:39:00.217 MST [68/T113] INFO: rw------- root:root        88   FTL-68-lock
2025-11-08 08:39:00.217 MST [68/T113] INFO: ---------------------------------------------------
2025-11-08 08:39:00.217 MST [68/T113] INFO: Please also include some lines from above the !!!!!!!!! header.
2025-11-08 08:39:00.217 MST [68/T113] INFO: Thank you for helping us to improve our FTL engine!
2025-11-08 08:39:00.217 MST [68/T113] INFO: Shutting down thread...
2025-11-08 08:39:00.217 MST [68/T113] INFO: Asked to terminate by "/usr/bin/pihole-FTL no-daemon" (PID 68, user root UID 0)
2025-11-08 08:39:00.247 MST [68M] ERROR: Error when obtaining outer SHM lock: Previous owner died
2025-11-08 08:39:00.248 MST [68M] ERROR: Error when obtaining inner SHM lock: Previous owner died
2025-11-08 08:39:00.263 MST [68/T116] INFO: Terminating timer thread
2025-11-08 08:39:01.097 MST [68/T114] INFO: Terminating GC thread
2025-11-08 08:39:01.136 MST [68/T115] INFO: Terminating resolver thread
2025-11-08 08:39:01.502 MST [68M] ERROR: export_queries_to_disk(): Failed to export queries: database is locked
2025-11-08 08:39:01.502 MST [68M] INFO:     with timestamp = 1762616340.498668
2025-11-08 08:39:02.506 MST [68M] ERROR: ERROR: SQL query "INSERT OR REPLACE INTO disk.ftl (id, value) VALUES ( 1, 1762616339.456702 );" failed: database is locked (SQLITE_BUSY)
2025-11-08 08:39:02.506 MST [68M] ERROR: export_queries_to_disk(): Cannot update timestamp: database is locked
2025-11-08 08:39:03.509 MST [68M] ERROR: ERROR: SQL query "UPDATE disk.counters SET value = value + 0 WHERE id = 0;" failed: database is locked (SQLITE_BUSY)
2025-11-08 08:39:03.509 MST [68M] ERROR: export_queries_to_disk(): Cannot update total queries counter: database is locked
2025-11-08 08:39:04.511 MST [68M] ERROR: ERROR: SQL query "UPDATE disk.counters SET value = value + 0 WHERE id = 1;" failed: database is locked (SQLITE_BUSY)
2025-11-08 08:39:04.511 MST [68M] ERROR: export_queries_to_disk(): Cannot update blocked queries counter: database is locked
2025-11-08 08:39:04.614 MST [68M] ERROR: export_queries_to_disk(disk.domain_by_id): Cannot export subtable: database is locked
2025-11-08 08:39:04.614 MST [68M] ERROR: export_queries_to_disk(disk.client_by_id): Cannot export subtable: database is locked
2025-11-08 08:39:04.614 MST [68M] ERROR: export_queries_to_disk(disk.forward_by_id): Cannot export subtable: database is locked
2025-11-08 08:39:04.614 MST [68M] ERROR: export_queries_to_disk(disk.addinfo_by_id): Cannot export subtable: database is locked
2025-11-08 08:39:04.614 MST [68M] ERROR: export_queries_to_disk(disk.sqlite_sequence): Cannot export subtable: database is locked
2025-11-08 08:39:04.614 MST [68M] INFO: Finished final database update
2025-11-08 08:39:04.614 MST [68M] INFO: Waiting for threads to join
2025-11-08 08:39:04.614 MST [68M] INFO: Thread ntp-client (4) is idle, terminating it.
2025-11-08 08:39:04.614 MST [68M] INFO: Thread webserver (7) is idle, terminating it.
2025-11-08 08:39:04.614 MST [68M] INFO: All threads joined
2025-11-08 08:39:04.617 MST [68M] INFO: PID file emptied
2025-11-08 08:39:05.619 MST [68M] ERROR: SQL error in backup_db_sessions(): database is locked (5)
2025-11-08 08:39:05.939 MST [68M] INFO: ########## FTL terminated after 1d 17h 5m 20s  (code 1)! ##########
  [i] pihole-FTL exited with status 1
  [i] Container will now stop or restart depending on your restart policy
      https://docs.docker.com/engine/containers/start-containers-automatically/#use-a-restart-policy

[DL6ER]

Sorry for you encountering a crash. I tried to reproduce this crash this morning but it doesn't seem possible. Could you get us a backtrace so we can work on a fix for this? Check out our detailed instructions at https://docs.pi-hole.net/ftldns/debugging/ for what needs to be done. We are always here in case you have additional questions beyond what is described there.

Thank you for helping us make Pi-hole better for us all!

[github-actions]

This issue is stale because it has been open 30 days with no activity. Please comment or update this issue or it will be closed in 5 days.