linux-kernel - Re: "WARNING in rcu_sr_normal_complete" in Linux Kernel v6.12-rc4

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Message-ID: <Z4kRzMO03mwjqCu2@pc636>
Date: Thu, 16 Jan 2025 15:03:56 +0100
From: Uladzislau Rezki <urezki@...il.com>
To: cheung wall <zzqq0103.hey@...il.com>
Cc: "Paul E. McKenney" <paulmck@...nel.org>,
	Frederic Weisbecker <frederic@...nel.org>,
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>,
	Joel Fernandes <joel@...lfernandes.org>,
	Josh Triplett <josh@...htriplett.org>,
	Boqun Feng <boqun.feng@...il.com>,
	Uladzislau Rezki <urezki@...il.com>, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Zqiang <qiang.zhang1211@...il.com>, rcu@...r.kernel.org
Subject: Re: "WARNING in rcu_sr_normal_complete" in Linux Kernel v6.12-rc4

Hello, Cheung Wall!

> 
> I am writing to report a potential vulnerability identified in the
> Linux Kernel version v6.12-rc4. This vulnerability was discovered
> while i was testing the kernel.
> 
> Linux Kernel Repository Git Commit:
> 42f7652d3eb527d03665b09edac47f85fb600924 (tag: v6.12-rc4)
> 
> Bug Location: 0010:rcu_sr_normal_complete+0xd0/0x110 kernel/rcu/tree.c:1638
> 
> Bug report: https://pastebin.com/kuJ7wnPe
> 
> Entire Log: https://pastebin.com/fT42ya0T
> 
> Thank you for your time and attention.
> 
Do you have a reproducer of this splat?

Thank you in advance!

--
Uladzislau Rezki