linux-kernel - Re: -git: BUG: unable to handle kernel paging request at c0100248 [CPU hotplug]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 27 Jul 2008 21:40:46 +0200
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	"Thomas Gleixner" <tglx@...utronix.de>
Cc:	"Dmitry Adamushko" <dmitry.adamushko@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	"Thomas Meyer" <thomas@...3r.de>,
	"the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: -git: BUG: unable to handle kernel paging request at c0100248 [CPU hotplug]

On Sun, Jul 27, 2008 at 9:35 PM, Vegard Nossum <vegard.nossum@...il.com> wrote:
> On Sun, Jul 27, 2008 at 9:23 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
>> On Sun, 27 Jul 2008, Vegard Nossum wrote:
>>> Booting processor 1/1 ip 6000
>>> Initializing CPU#1
>>> [...]
>>> Write protecting the kernel text: 5648k
>>>
>>> So it succeeds because the protection happens much later :-)
>>
>> Patch below fixes the issue. I get it to Linus ASAP.
>
> Nice :)
>
> [...]
>
>> +.section .cpuinit.data,"wa"
>> +.align 4
>> +ENTRY(initial_code)
>> +       .long i386_start_kernel
>> +
>>  .section .text
>>  /*
>>  * Real beginning of normal "text" segment
>>
>
> Hm, isn't there some kind of "section stack" that can be used to
> restore the previous section? .pushsection/.popsection directives?

Oh, never mind :-)

(Sorry for the noise.)


Vegard

-- 
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
	-- E. W. Dijkstra, EWD1036
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/