linux-kernel - Re: events: possible deadlock in __perf_event_task_sched

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Message-ID: <20170821200827.GD32112@worktop.programming.kicks-ass.net>
Date:   Mon, 21 Aug 2017 22:08:27 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Shubham Bansal <illusionist.neo@...il.com>
Cc:     mingo@...hat.com, acme@...nel.org,
        alexander.shishkin@...ux.intel.com,
        LKML <linux-kernel@...r.kernel.org>, syzkaller@...glegroups.com
Subject: Re: events: possible deadlock in __perf_event_task_sched_out

On Mon, Aug 21, 2017 at 01:58:13PM +0530, Shubham Bansal wrote:
> > This is a WARN, printk is a pig.
> 
> So, its not a bug?

No, triggering the WARN is the problem, this is just fallout after that.