linux-kernel - Re: "sched/rt: Fix race in push_rt_task" linux kernel patch backports

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Message-ID: <eCk4_5Iw9zAvw2GlXykxQLi-UHnurV-YIpvvRr5fcos3jLwkgt4BpAAdOPyqyWmY8nOSfPEIH45H6qeod55YoebbioO8ZV9NyD7wWVvt_Y0=@protonmail.com>
Date: Wed, 28 Jan 2026 13:35:13 +0000
From: Jari Ruusu <jariruusu@...tonmail.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Sasha Levin <sashal@...nel.org>, Jon Kohler <jon@...anix.com>, Rahul Chunduru <rahul.chunduru@...anix.com>, Harshit Agarwal <harshit@...anix.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: "sched/rt: Fix race in push_rt_task" linux kernel patch backports

Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> On Wed, Jan 28, 2026 at 12:02:21PM +0000, Jari Ruusu wrote:
> > Greg Kroah-Hartman gregkh@...uxfoundation.org wrote:
> > > > Important upstream "sched/rt: Fix race in push_rt_task", commit
> > > > 690e47d1403e90b7f2366f03b52ed3304194c793, is present in 6.18.y
> > > > and 6.12.y kernel branches, but seems to be missing from older
> > > > kernel branches.
> > > > 
> > > > Any chance backporting that race fix to older kernel branches?
> > > 
> > > It does not apply cleanly to older kernel branches. So if it is needed
> > > there, please provide a working backport and we will be glad to consider
> > > it.
> > 
> > 6.12.y backport applies cleanly and works OK for 6.6.y and 6.1.y branches.
> > I did not test any older branches.
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.12.y&id=debfbc047196df1f6bfd52f2d028c21dce67f0de
> 
> Can you please send this with your signed-off-by as you have tested it?

6.12.y backport tested on 6.6.y and 6.1.y branches
Tested-by: Jari Ruusu <jariruusu@...tonmail.com>

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Jari Ruusu  4096R/8132F189 12D6 4C3A DCDA 0AA4 27BD  ACDF F073 3C80 8132 F189