From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Jonas Jelonek <jelonek.jonas@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
linux-mips@vger.kernel.org, Clark Williams <clrkwllms@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@kernel.org>,
Jiayuan Chen <jiayuan.chen@linux.dev>,
linux-rt-devel@lists.linux.dev, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH v2] MIPS: smp: report dying CPU to RCU in stop_this_cpu()
Date: Fri, 19 Jun 2026 09:43:23 +0200 [thread overview]
Message-ID: <20260619074323.IIq-0qan@linutronix.de> (raw)
In-Reply-To: <20260608093729.12111-1-jelonek.jonas@gmail.com>
On 2026-06-08 09:37:29 [+0000], Jonas Jelonek wrote:
> smp_send_stop() parks all secondary CPUs in stop_this_cpu(). The function
> marks the CPU offline for the scheduler via set_cpu_online(false) but
> never informs RCU, so RCU keeps expecting a quiescent state from CPUs
> that are now spinning forever with interrupts disabled.
…
>
> Fixes: 91840be8f710 ("irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT")
> CC: stable@vger.kernel.org
> Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Sorry for being late.
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Sebastian
next prev parent reply other threads:[~2026-06-19 7:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-08 9:37 Jonas Jelonek
2026-06-10 6:05 ` Huacai Chen
2026-06-15 7:00 ` Jonas Jelonek
2026-06-15 7:09 ` Huacai Chen
2026-06-15 7:16 ` Jonas Jelonek
2026-06-15 7:30 ` Huacai Chen
2026-06-15 7:40 ` Jonas Jelonek
2026-06-19 7:14 ` Huacai Chen
2026-06-19 7:43 ` Sebastian Andrzej Siewior [this message]
2026-06-19 7:53 ` Jonas Jelonek
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