I did more tests with this, it looks like the problem is hidden somewhere in openvswitch. The specific test case that seems to trigger the bug 100% of the time is the one attached, but it requires to change the time immediately before running it (for example using date --set "23:57:00", as suggested before).
An interesting thing that I've tried is to always return an error from ovs_vport_alloc(), this obviously prevents openvswitch from working, but with this change applied I wasn't able to trigger the bug. This requires more investigation, but it looks like somewhere in the openvswitch is corrupting some allocated memory, triggering the kernel bug from other random places. ** Attachment added: "openvswitch test case to trigger this bug" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813244/+attachment/5249516/+files/lp1262692 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1813244 Title: systemd cause kernel trace "BUG: unable to handle kernel paging request at 6db23a14" on Cosmic i386 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813244/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
