Linux-ARM-Kernel Archive on lore.kernel.org
 help / color / Atom feed
From: mhocko@kernel.org (Michal Hocko)
To: linux-arm-kernel@lists.infradead.org
Subject: linux-next: Tree for Nov 7
Date: Tue, 14 Nov 2017 10:04:44 +0100
Message-ID: <20171114090444.lhrkuywuls26g6lu@dhcp22.suse.cz> (raw)
In-Reply-To: <87h8txw87w.fsf@concordia.ellerman.id.au>

On Tue 14-11-17 19:54:59, Michael Ellerman wrote:
> Michal Hocko <mhocko@kernel.org> writes:
[...]
> > So this was the most simple solution I could come up
> > with. If there was a general interest for MAP_FIXED_SAFE then we can
> > introduce it later of course. I would just like the hardening merged
> > sooner rather than later.
> 
> Sure. But in the scheme of things one more kernel release is not that
> big a deal to get it right. Given that the simple approach of dropping
> MAP_FIXED turns out to not be simple at all.

Well, my idea was to push this hardening to older kernels because those
were more vulnerable for the PIE base vs. stack placement and stack
controllable size from userspace etc... Anyway, as per [1] it seems that
the MAP_FIXED_SAFE doesn't look terrible from the backporting POV.

If there is a general consensus that this is the preferred way to go, I
will post the patch as an RFC to linux-api

[1] http://lkml.kernel.org/r/20171113160637.jhekbdyfpccme3be at dhcp22.suse.cz
-- 
Michal Hocko
SUSE Labs

  reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20171107162217.382cd754@canb.auug.org.au>
     [not found] ` <CACPK8Xfd4nqkf=Lk3n6+TNHAAi327r0dkUfGypZ3TpR0LqfS4Q@mail.gmail.com>
     [not found]   ` <20171108142050.7w3yliulxjeco3b7@dhcp22.suse.cz>
     [not found]     ` <20171110123054.5pnefm3mczsfv7bz@dhcp22.suse.cz>
     [not found]       ` <CACPK8Xe5uUKEytkRiszdX511b_cYTD-z3X=ZsMcNJ-NOYnXfuQ@mail.gmail.com>
2017-11-13  9:20         ` Michal Hocko
2017-11-13  9:34           ` Russell King - ARM Linux
2017-11-13  9:42           ` Michal Hocko
2017-11-13 11:34             ` Michael Ellerman
2017-11-13 12:00               ` Michal Hocko
2017-11-13 15:16                 ` Michal Hocko
2017-11-13 15:48                   ` Russell King - ARM Linux
2017-11-13 15:59                     ` Michal Hocko
2017-11-13 15:49                   ` Michal Hocko
2017-11-13 16:06                     ` Michal Hocko
2017-11-13 16:35                       ` Khalid Aziz
2017-11-14  7:07                         ` Michal Hocko
2017-11-14  9:18                       ` Michael Ellerman
2017-11-14  9:29                         ` Michal Hocko
2017-11-14  9:02                   ` Michael Ellerman
2017-11-14  8:54                 ` Michael Ellerman
2017-11-14  9:04                   ` Michal Hocko [this message]
2017-11-14 14:52                     ` Khalid Aziz
2017-11-13 14:11           ` Michal Hocko
2017-11-13 15:09             ` Russell King - ARM Linux
2017-11-13 15:31               ` Michal Hocko

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20171114090444.lhrkuywuls26g6lu@dhcp22.suse.cz \
    --to=mhocko@kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-ARM-Kernel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-arm-kernel/0 linux-arm-kernel/git/0.git
	git clone --mirror https://lore.kernel.org/linux-arm-kernel/1 linux-arm-kernel/git/1.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-arm-kernel linux-arm-kernel/ https://lore.kernel.org/linux-arm-kernel \
		linux-arm-kernel@lists.infradead.org
	public-inbox-index linux-arm-kernel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-arm-kernel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git