After previous comment I checked my system settings and find what affect to this bug. I usually disable system core dump in all linux distributions using kernel.core_pattern=| in sysctl.conf
When kernel.core_pattern has default all ok. So kernel.core_pattern=| cause this bug. It occurs since kernel 5.3 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1863086 Title: unkillable process (kernel NULL pointer dereference) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863086/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
