linux-kernel - Re: [syzbot] [cgroups?] WARNING in css_rstat

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Message-ID: <uenvth6s5pfulsz36nxfgg7s2nfi4wm5334edyogiicq4x54mg@kh7keqfyrihh>
Date: Thu, 17 Jul 2025 11:46:03 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Michal Koutný <mkoutny@...e.com>
Cc: JP Kobryn <inwardvessel@...il.com>, 
	syzbot <syzbot+8d052e8b99e40bc625ed@...kaller.appspotmail.com>, cgroups@...r.kernel.org, hannes@...xchg.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, tj@...nel.org
Subject: Re: [syzbot] [cgroups?] WARNING in css_rstat_exit

On Thu, Jul 17, 2025 at 03:28:27PM +0200, Michal Koutný wrote:
> Thanks for looking into this JP.
> You seem to tracked down the cause with uncleaned rstat, beware that the
> approach in the patch would leave reference imbalance after
> init_and_link_css() though.

Yeah I discussed the same with JP and I think JP is planning to move the
css_rstat_init() before init_and_link_css() and a second param to
css_rstat_init() to differentiate between css_is_self() or not.