linux-kernel - Re: [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic

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:	Fri, 28 Jan 2011 08:59:31 +0100
From:	Jan Ceuleers <jan.ceuleers@...puter.org>
To:	Tejun Heo <tj@...nel.org>
CC:	"Ahmed S. Darwish" <darwish.07@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, X86-ML <x86@...nel.org>,
	Tony Luck <tony.luck@...el.com>, Dave Jones <davej@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	Willy Tarreau <wtarreau@...a.kernel.org>,
	Willy Tarreau <w@....eu>, Dirk Hohndel <hohndel@...radead.org>,
	Dirk.Hohndel@...el.com, IDE-ML <linux-ide@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon
 panic

On 25/01/11 15:49, Tejun Heo wrote:
> I'm afraid this is gonna be something which works sometimes (or even
> more times than not) but can't ever be made reliable.  I think it
> would be better to head toward usb or other kind of early console.

Apologies in advance if this is a stupid idea, but would it be possible 
and safer to dedicate a whole device (such as a USB thumb drive or a 
memory card) to this? You could initialise the media in a certain way to 
let the kernel know that it is OK to trample on the device.

You'd have a mkpoops command (make persistent oops :-). Perhaps this 
could be a new partition table type. The kernel could either auto-detect 
such a device or be told which-one to use. It could then, upon crash and 
prior to writing to it, re-verify that the device bears the hallmarks of 
being a poops device.

Thanks, Jan
--
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/