linux-kernel - Re: cgroup null pointer dereference

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Message-ID: <20250425152604.GA15999@lst.de>
Date: Fri, 25 Apr 2025 17:26:04 +0200
From: hch <hch@....de>
To: Waiman Long <llong@...hat.com>
Cc: hch <hch@....de>, Kamaljit Singh <Kamaljit.Singh1@....com>,
	"cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
	"linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
	"kbusch@...nel.org" <kbusch@...nel.org>,
	"sagi@...mberg.me" <sagi@...mberg.me>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: cgroup null pointer dereference

On Fri, Apr 25, 2025 at 11:22:50AM -0400, Waiman Long wrote:
> The nvme-6.15-2025-04-10 branch used by Kmaljit includes some v6.15
> commits like the cgroup commit 093c8812de2d3 ("cgroup: rstat:
> Cleanup flushing functions and locking") but not its fix commit
> 7d6c63c31914 ("cgroup: rstat: call cgroup_rstat_updated_list with
> cgroup_rstat_lock"). That can cause system crash in some cases. That
> problem will be resolved if nvme is rebased on top of v6.15-rc1 or
> later as the fix commit will be included.

The nvme branches are always rebased on top of the current relevant block
branches, i.e. block-6.15 in thise case.  Everything else would create
merge issues.