Alex, thanks for the review! We can definitely remove the dependency of AUFS and provide a standalone patch, in this way we can provide this feature also to those kernels that don't have AUFS enabled (like all the recent kernels in jammy). I'll work on that and will ping you when I have a patch ready to be tested (unless you prepare something before me). :)
-- 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/1967924 Title: re-apply missing overlayfs SAUCE patch Status in linux package in Ubuntu: Fix Committed Status in linux source package in Impish: Fix Committed Status in linux source package in Jammy: In Progress Bug description: [Impact] Starting with 5.13 we've incorrectly dropped the following sauce patch: UBUNTU: SAUCE: overlayfs: fix incorrect mnt_id of files opened from map_files This patch seems to be required to use overlayfs on top of shiftfs and without this patch we may break containers that rely on shiftfs (using zfs/ceph as storage pool w/ shiftfs enabled). [Test case] No specific test case provided. [Fix] The original SAUCE patch relies on AUFS in order to use vma->vm_prfile, but we're not providing AUFS anymore in jammy,. The fix consists of re-apply this patch with a little refactoring to be dependent on CONFIG_AUFS_FS. [Regression potential] This patch is touching overlayfs, so we may see potential regressions in overlayfs. [Original bug report] The next patch has not been ported to the the 5.13 branch: $ git show Ubuntu-azure-5.8-5.8.0-1033.35_20.04.1~656 commit 5f5716d1f7ece06c66d7d8145dd6b3a5886b3e56 Author: Alexander Mikhalitsyn <alexan...@mihalicyn.com> Date: Mon Apr 26 10:11:00 2021 +0200 UBUNTU: SAUCE: overlayfs: fix incorrect mnt_id of files opened from map_files BugLink: https://bugs.launchpad.net/bugs/1857257 ... Fixes: d24b8a5 ("UBUNTU: SAUCE: overlayfs: allow with shiftfs as underlay") But it isn't in the 5.13 branch: $ git log --pretty=oneline origin/azure-5.13-next fs/overlayfs/file.c 1e6145d8708c831d2aa5c26aa15eb98e1a1683b9 ovl: fix use after free in struct ovl_aio_req 7b5bda27d1fc4d7bde20cf6ed203fe88c458169a ovl: fix IOCB_DIRECT if underlying fs doesn't support direct IO 1626e7f7ab7eb74e142fec7fe6b7c9614972a56b ovl: fix deadlock in splice write 1443bc4a25ca84d60d39a8ae1dc6215abdd637a4 UBUNTU: SAUCE: overlayfs: allow with shiftfs as underlay To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1967924/+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
