[PATCH 0/1] Partial fix for mm/slub regression (LP #1895109)

Kleber Sacilotto de Souza kleber.souza at canonical.com
Thu Sep 10 10:04:05 UTC 2020

[ 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 dde3c6b72a16c2db826f54b2d49bdea26c3534a2,
applied to focal/linux as part of v5.4.47 upstream stable release
(bug 1884089), seems to improve the situation.

[ 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.

Kleber Sacilotto de Souza (1):
  UBUNTU: SAUCE: Revert "mm/slub: fix a memory leak in sysfs_slab_add()"

 mm/slub.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)


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