linux-kernel - [GIT PULL] cgroup fixes for v6.19-rc1

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Message-ID: <ab515375a4aa072868aeba23668fe162@kernel.org>
Date: Mon, 15 Dec 2025 06:54:23 -1000
From: Tejun Heo <tj@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
 Johannes Weiner <hannes@...xchg.org>, Michal Koutný <mkoutny@...e.com>,
 Waiman Long <longman@...hat.com>
Subject: [GIT PULL] cgroup fixes for v6.19-rc1

Hi Linus,

The following changes since commit c2f2b01b74be8b40a2173372bcd770723f87e7b2:

  Merge tag 'i3c/for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux (2025-12-08 11:25:14 +0900)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git tags/cgroup-for-6.19-rc1-fixes

for you to fetch changes up to 3309b63a2281efb72df7621d60cc1246b6286ad3:

  cgroup: rstat: use LOCK CMPXCHG in css_rstat_updated (2025-12-08 08:26:56 -1000)

----------------------------------------------------------------
cgroup: Fixes for v6.19-rc1

- Fix a race condition in css_rstat_updated() where CMPXCHG without LOCK
  prefix could cause lnode corruption when the flusher runs concurrently
  on another CPU. The issue was introduced in 6.17 and causes memcg stats
  to become corrupted in production.

----------------------------------------------------------------
Shakeel Butt (1):
      cgroup: rstat: use LOCK CMPXCHG in css_rstat_updated

 kernel/cgroup/rstat.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

Thanks.
--
tejun