linux-kernel - Re: perf_fuzzer compiled for x32 causes reboot

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Message-ID: <20140228212700.GH14089@laptop.programming.kicks-ass.net>
Date:	Fri, 28 Feb 2014 22:27:00 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Vince Weaver <vincent.weaver@...ne.edu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: perf_fuzzer compiled for x32 causes reboot

On Fri, Feb 28, 2014 at 01:17:33PM -0800, Paul E. McKenney wrote:
> This code isn't running in idle context is it?  If so, RCU will happily
> free out from under it.  CONFIG_PROVE_RCU should detect this sort of thing,
> though.

Well, interrupts/NMIs can happen when idle, but the interrupt/NMI
entry code deals with the idle state AFAIK.
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