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

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Date:	Mon, 11 Nov 2013 13:07:22 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Fengguang Wu <fengguang.wu@...el.com>,
	Joe Mario <jmario@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [kallsyms] general protection fault: 0000 [#1] PREEMPT DEBUG_PAGEALLOC

On 10.11.2013 16:23, Andi Kleen wrote:
> 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.

I'm testing a patch for include/linux/pci.h to use line numbers instead
of the PCI ID macros to declare the __pci_fixup_* symbols. If that
works, we can revert the limit back to 128 and only keep the check in
kallsyms.c.

Michal
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