Hello, I have the same problem since yesterday.
I’m running Cor 170. I created a new certificate for OpenVPN because that’s why I’m getting this error.
I had no problems with the old certificate until yesterday.
Oct 18 13:43:48 famschamrouter kernel: Out of memory: Killed process 20609 (openvpn-authent) total-vm:6056616kB, anon-rss:5725164kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:11848kB oom_score_adj:0
The problem keeps recurring, this process (openvpn-authent) fills up the memory until it is full. This process occurs periodically every night or after a new certificate is created. Other processes are then terminated (qemu). I have now deleted the certificates and deactivated OpenVPN, since then the problem has not occurred again.
Hi,
to rule out a bug in OpenVPN < 2.5.7, may I ask you to install the latest Core Update 171, reboot your IPFire machine, and test whether the latest OpenVPN version makes a difference?
Thanks in advance, and best regards,
Peter Müller
I have now installed the update to Core 171.
I created a new certificate for openVPN and started openVPN. The problem doesn’t seem to exist at the moment.
On Core 170, the process (openvpn-authentic) is carried out immediately after creating a certificate, the frequency of the CPU has increased to 100% and the memory is filled.
Will continue to monitor the development, but it seems like the update will fix it.
Thanks and best regards,
Jurgen Schamberger
Unfortunately too early happy. Same again tonight 
Oct 21 01:49:21 famschamrouter kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/,task=openvpn-authent,pid=7917,uid=0
Oct 21 01:49:21 famschamrouter kernel: Out of memory: Killed process 7917 (openvpn-authent) total-vm:8616456kB, anon-rss:6662008kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:15108kB oom_score_adj:0
I noticed that the trigger is a new contact establishment or openVPN is stopped.
MorningReconnect here:
Oct 21 01:10:00 famschamrouter ipfire: ConnSched disconnect
Oct 21 01:10:00 famschamrouter pppd[4532]: Terminating on signal 15
Oct 21 01:10:00 famschamrouter pppd[4532]: Connect time 437.5 minutes.
Oct 21 01:10:00 famschamrouter pppd[4532]: Sent 392473603 bytes, received 15497873 bytes.
Oct 21 01:10:00 famschamrouter pppd[4532]: Connection terminated.
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: event_wait : Interrupted system call (code=4)
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: /sbin/ip route del 10.80.147.0/24
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: ERROR: Linux route delete command failed: external program exited with error status: 2
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: /sbin/ip route del 10.90.147.0/24
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: ERROR: Linux route delete command failed: external program exited with error status: 2
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: Closing TUN/TAP interface
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: /sbin/ip addr del dev tun0 local 10.90.147.1 peer 10.90.147.2
Oct 21 01:10:00 famschamrouter openvpnserver[7877]: Linux ip addr del failed: external program exited with error status: 2
and here I stopped openVPN manually
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: event_wait : Interrupted system call (code=4)
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: /sbin/ip route del 10.80.147.0/24
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: ERROR: Linux route delete command failed: external program exited with error status: 2
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: /sbin/ip route del 10.90.147.0/24
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: ERROR: Linux route delete command failed: external program exited with error status: 2
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: Closing TUN/TAP interface
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: /sbin/ip addr del dev tun0 local 10.90.147.1 peer 10.90.147.2
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: Linux ip addr del failed: external program exited with error status: 2
Oct 21 02:35:49 famschamrouter openvpnserver[13717]: SIGTERM[hard,] received, process exiting
Oct 21 02:35:50 famschamrouter vnstatd[9357]: Interface "tun0" disabled.
Hi,
i have the same problem.
My N2N setup work, but i’m not able to connect by roadwarrior.
Nov 27 14:55:46 fw kernel: openvpn-authent invoked oom-killer: gfp_mask=0x1100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
Nov 27 14:55:46 fw kernel: CPU: 0 PID: 2418 Comm: openvpn-authent Not tainted 5.15.71-ipfire #1
Nov 27 14:55:46 fw kernel: [ 2418] 0 2418 371498 336105 2871296 14190 0 openvpn-authent
Nov 27 14:55:46 fw kernel: [ 2440] 99 2440 1906 68 53248 157 0 openvpn
Nov 27 14:55:46 fw kernel: [ 3570] 0 3570 35054 29222 307200 1230 0 openvpn-authent
Nov 27 14:55:46 fw kernel: [ 3850] 99 3850 1873 170 53248 0 0 openvpn
Nov 27 14:55:46 fw kernel: [ 3889] 0 3889 4020 1803 73728 0 0 openvpn-authent
Nov 27 14:55:46 fw kernel: oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/,task=openvpn-authent,pid=2418,uid=0
Nov 27 14:55:46 fw kernel: Out of memory: Killed process 2418 (openvpn-authent) total-vm:1485992kB, anon-rss:1344420kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:2804kB oom_score_adj:0
I allready extended the memory, but no difference.
Thanks Frank
@frodo maybe you could add your comment to the bug report.