Linux-Security-Module Archive on lore.kernel.org
 help / color / Atom feed
From: James Morris <jmorris@namei.org>
To: Salvatore Mesoraca <s.mesoraca16@gmail.com>
Cc: linux-kernel@vger.kernel.org,
	kernel-hardening@lists.openwall.com, linux-mm@kvack.org,
	linux-security-module@vger.kernel.org,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Brad Spengler <spender@grsecurity.net>,
	Casey Schaufler <casey@schaufler-ca.com>,
	Christoph Hellwig <hch@infradead.org>,
	Jann Horn <jannh@google.com>, Kees Cook <keescook@chromium.org>,
	PaX Team <pageexec@freemail.hu>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v5 01/12] S.A.R.A.: add documentation
Date: Sat, 13 Jul 2019 10:14:41 +1000 (AEST)
Message-ID: <alpine.LRH.2.21.1907130953130.21853@namei.org> (raw)
In-Reply-To: <1562410493-8661-2-git-send-email-s.mesoraca16@gmail.com>

On Sat, 6 Jul 2019, Salvatore Mesoraca wrote:

> Adding documentation for S.A.R.A. LSM.

It would be good if you could add an operational overview to help people 
understand how it works in practice, e.g. setting policies for binaries 
via sara-xattr and global config via saractl (IIUC). It's difficult to 
understand if you have to visit several links to piece things together.

> +S.A.R.A.'s Submodules
> +=====================
> +
> +WX Protection
> +-------------
> +WX Protection aims to improve user-space programs security by applying:
> +
> +- `W^X enforcement`_
> +- `W!->X (once writable never executable) mprotect restriction`_
> +- `Executable MMAP prevention`_
> +
> +All of the above features can be enabled or disabled both system wide
> +or on a per executable basis through the use of configuration files managed by
> +`saractl` [2]_.

How complete is the WX protection provided by this module? How does it 
compare with other implementations (such as PaX's restricted mprotect).

> +Parts of WX Protection are inspired by some of the features available in PaX.

Some critical aspects are copied (e.g. trampoline emulation), so it's 
more than just inspired. Could you include more information in the 
description about what's been ported from PaX to SARA?
	

-- 
James Morris
<jmorris@namei.org>


  parent reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-06 10:54 [PATCH v5 00/12] S.A.R.A. a new stacked LSM Salvatore Mesoraca
2019-07-06 10:54 ` [PATCH v5 01/12] S.A.R.A.: add documentation Salvatore Mesoraca
2019-07-06 17:14   ` Randy Dunlap
2019-07-06 17:32     ` Salvatore Mesoraca
2019-07-13  0:14   ` James Morris [this message]
2019-07-06 10:54 ` [PATCH v5 02/12] S.A.R.A.: create framework Salvatore Mesoraca
2019-07-06 15:29   ` Randy Dunlap
2019-07-06 10:54 ` [PATCH v5 03/12] S.A.R.A.: cred blob management Salvatore Mesoraca
2019-07-12 23:35   ` James Morris
2019-07-06 10:54 ` [PATCH v5 04/12] S.A.R.A.: generic DFA for string matching Salvatore Mesoraca
2019-07-06 18:32   ` Jann Horn
2019-07-07 16:01     ` Salvatore Mesoraca
2019-07-08 17:37       ` Jann Horn
2019-07-06 10:54 ` [PATCH v5 05/12] LSM: creation of "check_vmflags" LSM hook Salvatore Mesoraca
2019-07-06 10:54 ` [PATCH v5 06/12] S.A.R.A.: WX protection Salvatore Mesoraca
2019-07-06 15:38   ` Randy Dunlap
2019-07-06 19:28   ` Al Viro
2019-07-07 15:49     ` Salvatore Mesoraca
2019-07-09  4:51       ` Kees Cook
2019-07-08 12:42   ` David Laight
2019-07-06 10:54 ` [PATCH v5 07/12] LSM: creation of "pagefault_handler" LSM hook Salvatore Mesoraca
2019-07-06 10:54 ` [PATCH v5 08/12] S.A.R.A.: trampoline emulation Salvatore Mesoraca
2019-07-06 15:31   ` Randy Dunlap
2019-07-06 10:54 ` [PATCH v5 09/12] S.A.R.A.: WX protection procattr interface Salvatore Mesoraca
2019-07-06 10:54 ` [PATCH v5 10/12] S.A.R.A.: XATTRs support Salvatore Mesoraca
2019-07-06 10:54 ` [PATCH v5 11/12] S.A.R.A.: /proc/*/mem write limitation Salvatore Mesoraca
2019-07-06 18:20   ` Jann Horn
2019-07-07 16:15     ` Salvatore Mesoraca
2019-07-06 10:54 ` [PATCH v5 12/12] MAINTAINERS: take maintainership for S.A.R.A Salvatore Mesoraca
2019-07-06 14:33 ` [PATCH v5 00/12] S.A.R.A. a new stacked LSM Jordan Glover
2019-07-06 15:02   ` Salvatore Mesoraca
2019-07-07  1:16 ` James Morris
2019-07-07 15:40   ` Salvatore Mesoraca

Reply instructions:

You may reply publically 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=alpine.LRH.2.21.1907130953130.21853@namei.org \
    --to=jmorris@namei.org \
    --cc=casey@schaufler-ca.com \
    --cc=hch@infradead.org \
    --cc=jannh@google.com \
    --cc=keescook@chromium.org \
    --cc=kernel-hardening@lists.openwall.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=pageexec@freemail.hu \
    --cc=s.mesoraca16@gmail.com \
    --cc=serge@hallyn.com \
    --cc=spender@grsecurity.net \
    --cc=tglx@linutronix.de \
    --cc=viro@zeniv.linux.org.uk \
    /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-Security-Module Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-security-module/0 linux-security-module/git/0.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-security-module linux-security-module/ https://lore.kernel.org/linux-security-module \
		linux-security-module@vger.kernel.org linux-security-module@archiver.kernel.org
	public-inbox-index linux-security-module


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-security-module


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