From: "Mickaël Salaün" <mic@digikod.net>
To: Casey Schaufler <casey@schaufler-ca.com>, linux-kernel@vger.kernel.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
Andreas Gruenbacher <agruenba@redhat.com>,
Andy Lutomirski <luto@amacapital.net>,
Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
Eric Paris <eparis@parisplace.org>,
James Morris <james.l.morris@oracle.com>,
John Johansen <john.johansen@canonical.com>,
Kees Cook <keescook@chromium.org>,
Kentaro Takeda <takedakn@nttdata.co.jp>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
Paul Moore <paul@paul-moore.com>,
"Serge E . Hallyn" <serge@hallyn.com>,
Stephen Smalley <sds@tycho.nsa.gov>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
Vivek Goyal <vgoyal@redhat.com>,
linux-fsdevel@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: Re: [PATCH v1] security: Add a new hook: inode_touch_atime
Date: Thu, 22 Dec 2016 01:01:39 +0100 [thread overview]
Message-ID: <585B17E3.5040809@digikod.net> (raw)
In-Reply-To: <f47921a9-bd93-34e4-bbc5-c9129d0c4426@schaufler-ca.com>
[-- Attachment #1.1: Type: text/plain, Size: 808 bytes --]
On 22/12/2016 00:33, Casey Schaufler wrote:
> On 12/21/2016 3:15 PM, Mickaël Salaün wrote:
>> Add a new LSM hook named inode_touch_atime which is needed to deny
>> indirect update of extended file attributes (i.e. access time) which are
>> not catched by the inode_setattr hook. By creating a new hook instead of
>> calling inode_setattr, we avoid to simulate a useless struct iattr.
>>
>> This hook allows to create read-only environments as with read-only
>> mount points. It can also take care of anonymous inodes.
>
> What security module would use this?
SELinux should be interested. This is useful to create sandboxes so
other LSM may be interested too
I'm working on a new LSM and I would like this kind of hook to create a
real read-only environment.
Regards,
Mickaël
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
next prev parent reply other threads:[~2016-12-22 0:02 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-21 23:15 [PATCH v1] security: Add a new hook: inode_touch_atime Mickaël Salaün
2016-12-21 23:33 ` Casey Schaufler
2016-12-22 0:01 ` Mickaël Salaün [this message]
2016-12-22 0:30 ` Casey Schaufler
2016-12-22 0:57 ` Al Viro
2016-12-22 8:58 ` Mickaël Salaün
2016-12-22 9:06 ` Christoph Hellwig
2016-12-22 6:25 ` Christoph Hellwig
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=585B17E3.5040809@digikod.net \
--to=mic@digikod.net \
--cc=agruenba@redhat.com \
--cc=casey@schaufler-ca.com \
--cc=dmitry.kasatkin@gmail.com \
--cc=eparis@parisplace.org \
--cc=james.l.morris@oracle.com \
--cc=john.johansen@canonical.com \
--cc=keescook@chromium.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=paul@paul-moore.com \
--cc=penguin-kernel@I-love.SAKURA.ne.jp \
--cc=sds@tycho.nsa.gov \
--cc=serge@hallyn.com \
--cc=takedakn@nttdata.co.jp \
--cc=vgoyal@redhat.com \
--cc=viro@zeniv.linux.org.uk \
--cc=zohar@linux.vnet.ibm.com \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).