linux-kernel - Re: BUG: kernel NULL pointer dereference from check_preempt

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Message-ID: <20200615082949.GL2497@hirez.programming.kicks-ass.net>
Date:   Mon, 15 Jun 2020 10:29:49 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>, mingo@...hat.com,
        juri.lelli@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, linux-kernel@...r.kernel.org
Subject: Re: BUG: kernel NULL pointer dereference from check_preempt_wakeup()

On Sat, Jun 13, 2020 at 04:40:30PM -0700, Paul E. McKenney wrote:

> So Peter's patch is fully in the clear:
> 
> Tested-by: Paul E. McKenney <paulmck@...nel.org>

Awesome!, now I get to explain how the lack of that leads to the
observed NULL pointer :-)