linux-kernel - Re: [Bugfix] sched: fix possible invalid memory access caused by CPU hot-addition

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Message-ID: <20140422081515.GF11182@twins.programming.kicks-ass.net>
Date:	Tue, 22 Apr 2014 10:15:15 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Tony Luck <tony.luck@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: [Bugfix] sched: fix possible invalid memory access caused by CPU
 hot-addition

On Tue, Apr 22, 2014 at 01:27:15PM +0800, Jiang Liu wrote:
> When calling kzalloc_node(size, flags, node), we should first check
> whether node is onlined, otherwise it may cause invalid memory access
> as below.

But this is only for memory less node crap, right? 
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