linux-kernel - Re: [kallsyms] general protection fault: 0000 [#1] PREEMPT DEBUG

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Date:	Sun, 10 Nov 2013 16:23:38 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Joe Mario <jmario@...hat.com>, Michal Marek <mmarek@...e.cz>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: [kallsyms] general protection fault: 0000 [#1] PREEMPT
 DEBUG_PAGEALLOC

On Sun, Nov 10, 2013 at 05:40:05PM +0800, Fengguang Wu wrote:
> Hi Joe,
> 
> FYI. Here is another bisect result.

I bet it's that strncpy() in kallsyms.c and someone passing in a too
short buffer on a 32bit kernel.

We should really kill strncpy(), it's just evil.

-And
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