linux-kernel - Re: [x86/asm/entry] BUG: unable to handle kernel paging request

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:	Mon, 9 Mar 2015 09:12:48 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Denys Vlasenko <vda.linux@...glemail.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Andy Lutomirski <luto@...capital.net>,
	Fengguang Wu <fengguang.wu@...el.com>, X86 ML <x86@...nel.org>,
	LKP <lkp@...org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [x86/asm/entry] BUG: unable to handle kernel paging request

On Mon, Mar 9, 2015 at 5:04 AM, Denys Vlasenko <vda.linux@...glemail.com> wrote:
>
> IIRC task gates weren't used in Linux at first, and now they are
> only used for double fault handler -

Actually, historical note: the TSS was very much used for task
switching originally. Not only was it a "play with how 386 works" test
vehicle, we used pretty much every part of the task switching features
(ie all the ioperm bits etc).

I forget when it was then rewritten to just do everything by hand, but
task gates very much were used.

                       Linus
--
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/