Public bug reported:
On Ubuntu 20.04 The idc-dhcp- server version is
isc-dhcp-server:
Installed: (none)
Candidate: 4.4.1-2.1ubuntu3
Version table:
4.4.1-2.1ubuntu3 500
500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
The DHCP server is being regularly killed, when searching google the bug looks
very similar to an older bug regarding accessing a lease file, that was fixed
year ago. As a temporary fix in systemd I have enabled a restart every time the
main process fails. The error got worse when i start to run a pair of dhcp
servers syncing state between each other
I regularly see the following in the syslog
Apr 4 00:04:55 gw sh[1500]: ../../../../lib/isc/unix/socket.c:3361:
INSIST(!sock->pending_send) failed, back trace
Apr 4 00:04:55 gw sh[1500]: #0 0x7f36befeda4a in ??
Apr 4 00:04:55 gw sh[1500]: #1 0x7f36befed980 in ??
Apr 4 00:04:55 gw sh[1500]: #2 0x7f36bf0297e1 in ??
Apr 4 00:04:55 gw sh[1500]: #3 0x7f36bedd0609 in ??
Apr 4 00:04:55 gw sh[1500]: #4 0x7f36bef0c153 in ??
Apr 4 00:04:55 gw systemd[1]: isc-dhcp-server.service: Main process exited,
code=killed, status=6/ABRT
Apr 4 00:04:55 gw systemd[1]: isc-dhcp-server.service: Failed with result
'signal'.
Apr 4 00:05:00 gw systemd[1]: isc-dhcp-server.service: Scheduled restart job,
restart counter is at 3.
Apr 4 00:05:00 gw systemd[1]: Stopped ISC DHCP IPv4 server.
Apr 4 00:05:00 gw systemd[1]: Started ISC DHCP IPv4 server.
Apr 4 00:05:00 gw kernel: [ 3508.161248] audit: type=1400
audit(1585958700.678:46): apparmor="DENIED" operation="open"
profile="/usr/sbin/dhcpd" name="/proc/2049/task/2068/comm" pid=2049
comm="dhcpd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
Apr 4 00:05:00 gw dhcpd[2049]: Internet Systems Consortium DHCP Server 4.4.1
Apr 4 00:05:00 gw sh[2049]: Internet Systems Consortium DHCP Server 4.4.1
Apr 4 00:05:00 gw sh[2049]: Copyright 2004-2018 Internet Systems Consortium.
Apr 4 00:05:00 gw sh[2049]: All rights reserved.
Apr 4 00:05:00 gw sh[2049]: For info, please visit
https://www.isc.org/software/dhcp/
Apr 4 00:05:00 gw dhcpd[2049]: Copyright 2004-2018 Internet Systems Consortium.
Apr 4 00:05:00 gw dhcpd[2049]: All rights reserved.
Apr 4 00:05:00 gw dhcpd[2049]: For info, please visit
https://www.isc.org/software/dhcp/
Apr 4 00:05:00 gw kernel: [ 3508.161561] audit: type=1400
audit(1585958700.678:47): apparmor="DENIED" operation="open"
profile="/usr/sbin/dhcpd" name="/proc/2049/task/2069/comm" pid=2049
comm="dhcpd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
Apr 4 00:05:00 gw kernel: [ 3508.161563] audit: type=1400
audit(1585958700.682:48): apparmor="DENIED" operation="open"
profile="/usr/sbin/dhcpd" name="/proc/2049/task/2070/comm" pid=2049
comm="dhcpd" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
Apr 4 00:05:00 gw dhcpd[2049]: Config file: /etc/dhcp/dhcpd.conf
Apr 4 00:05:00 gw sh[2049]: Config file: /etc/dhcp/dhcpd.conf
Apr 4 00:05:00 gw sh[2049]: Database file: /var/lib/dhcp/dhcpd.leases
Apr 4 00:05:00 gw sh[2049]: PID file: /run/dhcp-server/dhcpd.pid
Apr 4 00:05:00 gw dhcpd[2049]: Database file: /var/lib/dhcp/dhcpd.leases
Apr 4 00:05:00 gw dhcpd[2049]: PID file: /run/dhcp-server/dhcpd.pid
Apr 4 00:05:00 gw dhcpd[2049]: Wrote 0 deleted host decls to leases file.
** Affects: isc-dhcp (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1870729
Title:
DHCP Server regularly killed code=killed, status=6/ABRT
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