From: Philo Lu <lulie@linux.alibaba.com>
To: stable@vger.kernel.org
Cc: tj@kernel.org, hannes@cmpxchg.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, eadavis@qq.com, surenb@google.com,
akpm@linux-foundation.org, dust.li@linux.alibaba.com
Subject: [PATCH 6.6.y 0/2] sched/psi: fix race in pressure_write (CVE-2026-52991)
Date: Wed, 15 Jul 2026 16:42:54 +0800 [thread overview]
Message-ID: <20260715084256.43412-1-lulie@linux.alibaba.com> (raw)
This patchset is same as that for 6.12.y.
Backport of the CVE-2026-52991 fix.
1/2 (94a4acfec146) clear of->priv on release, turning the UAF into an
easier-to-detect NULL deref.
2/2 (a5b98009f16d, the CVE fix) extend cgroup_mutex to cover all
of->priv accesses, read ctx after taking the kn lock, and NULL-check
of->priv. It depends on 1/2 as discussed in [0].
[0] https://lore.kernel.org/all/8a06c5c3-8f7a-4252-a3b1-0c0d812e2654@oracle.com/
Chen Ridong (1):
cgroup/psi: Set of->priv to NULL upon file release
Edward Adam Davis (1):
sched/psi: fix race between file release and pressure write
kernel/cgroup/cgroup.c | 25 +++++++++++++++++--------
1 file changed, 17 insertions(+), 8 deletions(-)
--
2.47.3
next reply other threads:[~2026-07-15 8:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-15 8:42 Philo Lu [this message]
2026-07-15 8:42 ` [PATCH 6.6.y 1/2] cgroup/psi: Set of->priv to NULL upon file release Philo Lu
2026-07-15 8:42 ` [PATCH 6.6.y 2/2] sched/psi: fix race between file release and pressure write Philo Lu
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