linux-kernel - Re: [2/3] mm: fix up some user-visible effects of the stack guard page

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, 20 Aug 2010 09:24:50 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ian Campbell <ijc@...lion.org.uk>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Greg KH <gregkh@...e.de>
Subject: Re: [2/3] mm: fix up some user-visible effects of the stack guard page

On Fri, Aug 20, 2010 at 9:07 AM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> That said, it does strike me as rather odd to do VM ops on partial
> stacks. What are you doing, exactly, to hit this?

The reason I ask is that the _sane_ thing to do - if we really care
about this - is to change the 'vm_next' singly-linked list into using
'list.h'. It would clean up a fair amount of stuff, like removing the
need for that disgusting 'find_vma_prev()' thing. There are actually
several users of vma's that want to look at the previous vma, but
because it's hard to get at, they do something non-intuitive or odd.

At the same time, we've had that vm_next pointer since pretty much day
one, and I also get a strong feeling that it's not really worth the
churn.

                         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/