linux-kernel - Re: 2.6.22 regression: thermal trip points

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:	Thu, 2 Aug 2007 14:04:42 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Knut Petersen <Knut_Petersen@...nline.de>,
	linux-kernel@...r.kernel.org, trenn@...e.de, pavel@....cz,
	mjg59@...f.ucam.org, lenb@...nel.org
Subject: Re: 2.6.22 regression: thermal trip points

> > Set a taint flag, 
> That's hardly any useful if the machine is dead afterwards.

It won't be the hardware will do a failsafe shutdown first.

> You'll just end up with "Linux destroyed my laptop" headlines all 
> over the internet and rightfully very annoyed users.

You have to systematically sit down and tweak your machine.

> The philosophy didn't include physically destroying hardware
> as far as I know.

It most certainly did. With safety checks you could override.

> > As root you can erase the bios, 
> We don't ship the devbios driver for good reasons.

Thats debatably a bad reason (the user space API is wrong thats all), and
one thats totally inconsistent with some of the other drivers we do ship.

> > lock the hard disk with a random
> > password, reflash your video card .... 
> 
> That all requires significant effort and custom software. It's not that we 
> have a one liner echo destroy > /sys/.../flash-bios. 

Well you can do the hard disk one in one line of perl, the video card one
in a small bit of C. And this merely makes the argument that raising the
trip points should be harder.

Alan
-
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/