From: David Woodhouse <dwmw2@infradead.org>
To: Sasha Levin <sashal@kernel.org>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Mark Rutland <mark.rutland@arm.com>,
Michael Kelley <mikelley@microsoft.com>,
Oleksandr Natalenko <oleksandr@natalenko.name>,
Helge Deller <deller@gmx.de>,
"Guilherme G . Piccoli" <gpiccoli@igalia.com>
Subject: Re: [PATCH AUTOSEL 6.4 01/15] cpu/hotplug: Reset task stack state in _cpu_up()
Date: Mon, 03 Jul 2023 10:17:48 +0100 [thread overview]
Message-ID: <77ce6f91f163f333d4b2146e6ea66b7f5fe38d9e.camel@infradead.org> (raw)
In-Reply-To: <20230702194020.1776895-1-sashal@kernel.org>
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On Sun, 2023-07-02 at 15:40 -0400, Sasha Levin wrote:
> From: David Woodhouse <dwmw@amazon.co.uk>
>
> [ Upstream commit 6d712b9b3a58018259fb40ddd498d1f7dfa1f4ec ]
>
> Commit dce1ca0525bf ("sched/scs: Reset task stack state in bringup_cpu()")
> ensured that the shadow call stack and KASAN poisoning were removed from
> a CPU's stack each time that CPU is brought up, not just once.
>
> This is not incorrect.
No really, it *wasn't* incorrect. This isn't a bugfix that needs
backporting; it's preparation for the parallel CPU bringup which I
*hope* you aren't planning to backport in its entirety :)
Unless I'm missing something, I don't think you want this for stable
(in any of the trees it was just sent out for).
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prev parent reply other threads:[~2023-07-03 9:18 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-02 19:40 Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 02/15] x86/smpboot: Implement a bit spinlock to protect the realmode stack Sasha Levin
2023-07-03 9:19 ` [EXTERNAL] " David Woodhouse
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 03/15] io_uring: annotate offset timeout races Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 04/15] x86/amd_nb: Add MI200 PCI IDs Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 05/15] debugobjects: Recheck debug_objects_enabled before reporting Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 06/15] nbd: Add the maximum limit of allocated index in nbd_dev_add Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 07/15] md: fix data corruption for raid456 when reshape restart while grow up Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 08/15] md/raid10: prevent soft lockup while flush writes Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 09/15] scsi: sg: fix blktrace debugfs entries leakage Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 10/15] blk-mq: fix NULL dereference on q->elevator in blk_mq_elv_switch_none Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 11/15] posix-timers: Ensure timer ID search-loop limit is valid Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 12/15] btrfs: add xxhash to fast checksum implementations Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 13/15] btrfs: don't check PageError in __extent_writepage Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 14/15] btrfs: abort transaction at update_ref_for_cow() when ref count is zero Sasha Levin
2023-07-02 19:40 ` [PATCH AUTOSEL 6.4 15/15] erofs: Fix detection of atomic context Sasha Levin
2023-07-03 9:17 ` David Woodhouse [this message]
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