mm/slub kernel oops on focal kernel 5.4.0-45
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
[ Impact ]
As reported on bug 1894780 (Oops and hang when starting LVM snapshots on 5.4.0-47), some changes applied to focal/linux 5.4.0-45 introduced a regression likely on the mm/slub code. A fix hasn't been identified yet, however, reverting commit "mm/slub: fix a memory leak in sysfs_slab_add()", upstream dde3c6b72a16c2d
[ Fix ]
I propose to revert commit "mm/slub: fix a memory leak in sysfs_slab_add()" while we don't find a better fix for it.
[ Test Case ]
Please see bug 1894780.
[ Regression potential ]
The commit being reverted fixes a memory leak from a 2015 commit, so the chances of reverting it introducing more regressions is low. However, if it does we can expect issues on the sysfs slab code during memory allocations.
CVE References
Changed in linux (Ubuntu Focal): | |
status: | New → Confirmed |
Changed in linux (Ubuntu Focal): | |
status: | Confirmed → Fix Committed |
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1895109
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.