linux-kernel - Re: [PATCH 2/3] x86: Unify and fix init sp0

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:	Wed, 11 Mar 2015 12:21:07 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Oleg Nesterov <oleg@...hat.com>,
	Denys Vlasenko <dvlasenk@...hat.com>
Subject: Re: [PATCH 2/3] x86: Unify and fix init sp0

On Tue, Mar 10, 2015 at 11:05:59AM -0700, Andy Lutomirski wrote:
> x86_32 and x86_64 need slightly different sp0 values, and x86_32's was
> incorrect for init.  (This never mattered -- the init thread never
> runs user code, so we never used sp0 for anything.)

Damn old x86 cruft - sp0 is the stack pointer for CPL0 in the TSS. Had
to go dig that out.

> Fix it and mostly unify them.
> 
> Signed-off-by: Andy Lutomirski <luto@...capital.net>

Acked-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--
--
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/