Public bug reported: Under memory pressure, my VM locks up. This has been reported upstream though I don't know how far any solution has progressed.
https://bugzilla.kernel.org/show_bug.cgi?id=201603 Feb 6 07:15:42 vps632258 kernel: [151336.450064] z3fold: unknown buddy id 0 Feb 6 07:15:42 vps632258 kernel: [151336.454450] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 The little bit of log I managed to salvage is attached. This has happened to two identical VMs. Unusually it has not occurred on a third VM which is configured the same but has less RAM (fingers crossed it won't). Irrelevant information: I thought the lock-ups were due to me using a BTRFS filesystem, however I swapped over to NILFS2 and this still occurs. The only difference seems to be that I am now able to grab some of the kernel output. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.18.0-14-generic 4.18.0-14.15~18.04.1 ProcVersionSignature: Ubuntu 4.18.0-14.15~18.04.1-generic 4.18.20 Uname: Linux 4.18.0-14-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 Date: Wed Feb 6 10:55:05 2019 ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed-hwe UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux Importance: Unknown Status: Unknown ** Affects: linux-signed-hwe (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic kernel-bug kernel-bug-exists-upstream ** Attachment added: "dmesg.txt" https://bugs.launchpad.net/bugs/1814874/+attachment/5236292/+files/dmesg.txt ** Bug watch added: Linux Kernel Bug Tracker #201603 https://bugzilla.kernel.org/show_bug.cgi?id=201603 ** Also affects: systemd via https://bugzilla.kernel.org/show_bug.cgi?id=201603 Importance: Unknown Status: Unknown ** No longer affects: systemd ** Also affects: linux via https://bugzilla.kernel.org/show_bug.cgi?id=201603 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1814874 Title: NULL pointer dereference when using z3fold and zswap To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1814874/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
