Thanks. I tested the proposed kernel and it does not prevent the crash, which still occurs under the same circumstances when cryptsetup open runs. It's possible, however, that the patch decreases the likehood of a crash. In a very un-scientific test the latest patched kernel crashed in 3 out of 10 attempts, while the stock unpatched kernel crashed in 6 out of 10 attempts.
To mitigate the issue, with both the original and patched kernels, I'm manually loading the dm-crypt module before running cryptsetup luksFormat. Note that manually loading the module between cryptsetup luksFormat and cryptsetup open does not prevent the crash. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1835279 Title: 4.15.0-54.58-generic 4.15.18: oops/BUG on LUKS open Status in linux package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Bug description: This is Linux version 4.15.0-54-generic (buildd@lgw01-amd64-014) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #58-Ubuntu SMP Mon Jun 24 10:55:24 UTC 2019 (Ubuntu 4.15.0-54.58-generic 4.15.18), from pc- kernel_240.snap Version signature: 4.15.0-54.58-generic 4.15.18 Issue is non-deterministic, and happens in roughly 20% of the attempts. Running on: qemu-kvm, command line: kvm \ -bios /usr/share/ovmf/OVMF.fd \ -smp 2 -m 512 -netdev user,id=mynet0,hostfwd=tcp::8022-:22,hostfwd=tcp::8090-:80 \ -device virtio-net-pci,netdev=mynet0 \ -drive file=pc.img,format=raw Commands that caused the problem: cryptsetup -q --type luks2 --key-file <keyfile> luksFormat /dev/sda4 LD_PRELOAD=/lib/no-udev.so cryptsetup --type luks2 --key-file <keyfile> open /dev/sda4 crypt-data Notes: - See https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1589083 for more information on the no-udev workaround. - The commands are scripted. Also tried to add a 200ms and 1s interval before opening the device. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1835279/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
