From: Christoph Hellwig <hch@infradead.org>
To: "Mickaël Salaün" <mic@digikod.net>
Cc: linux-kernel@vger.kernel.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andreas Gruenbacher <agruenba@redhat.com>,
Andy Lutomirski <luto@amacapital.net>,
Casey Schaufler <casey@schaufler-ca.com>,
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: Wed, 21 Dec 2016 22:25:57 -0800 [thread overview]
Message-ID: <20161222062557.GA32729@infradead.org> (raw)
In-Reply-To: <20161221231506.19800-1-mic@digikod.net>
On Thu, Dec 22, 2016 at 12:15:06AM +0100, 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.
And LSM has absolutely no business doing that - that's what the mount
code is for.
prev parent reply other threads:[~2016-12-22 6:26 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
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 [this message]
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