From: Stefan Berger <stefanb@linux.vnet.ibm.com>
To: Mehmet Kayaalp <mkayaalp@linux.vnet.ibm.com>,
ima-devel <linux-ima-devel@lists.sourceforge.net>
Cc: containers <containers@lists.linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-security-module <linux-security-module@vger.kernel.org>,
Tycho Andersen <tycho@docker.com>,
"Serge E . Hallyn" <serge@hallyn.com>,
Yuqiong Sun <sunyuqiong1988@gmail.com>,
David Safford <david.safford@ge.com>,
Mehmet Kayaalp <mkayaalp@cs.binghamton.edu>
Subject: Re: [RFC PATCH 2/5] ima: Add ns_status for storing namespaced iint data
Date: Fri, 11 Aug 2017 11:00:52 -0400 [thread overview]
Message-ID: <9a2ae1ef-95c3-6eb3-bf4d-78b84d5a77e4@linux.vnet.ibm.com> (raw)
In-Reply-To: <20170720225033.21298-3-mkayaalp@linux.vnet.ibm.com>
On 07/20/2017 06:50 PM, Mehmet Kayaalp wrote:
> This patch adds an rbtree to the IMA namespace structure that stores a
> namespaced version of iint->flags in ns_status struct. Similar to the
> integrity_iint_cache, both the iint ns_struct are looked up using the
> inode pointer value. The lookup, allocate, and insertion code is also
> similar, except ns_struct is not free'd when the inode is free'd.
> Instead, the lookup verifies the i_ino and i_generation fields are also a
> match. A lazy clean up of the rbtree that removes free'd inodes could be
> implemented to reclaim the invalid entries.
>
> Signed-off-by: Mehmet Kayaalp <mkayaalp@linux.vnet.ibm.com>
> ---
> include/linux/ima.h | 3 +
> security/integrity/ima/ima.h | 16 ++++++
> security/integrity/ima/ima_ns.c | 120 ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 139 insertions(+)
>
>
> @@ -181,3 +198,106 @@ struct ima_namespace init_ima_ns = {
> .parent = NULL,
> };
> EXPORT_SYMBOL(init_ima_ns);
> +
> +/*
> + * __ima_ns_status_find - return the ns_status associated with an inode
> + */
> +static struct ns_status *__ima_ns_status_find(struct ima_namespace *ns,
> + struct inode *inode)
> +{
> + struct ns_status *status;
> + struct rb_node *n = ns->ns_status_tree.rb_node;
> +
> + while (n) {
> + status = rb_entry(n, struct ns_status, rb_node);
> +
> + if (inode < status->inode)
> + n = n->rb_left;
> + else if (inode->i_ino > status->i_ino)
> + n = n->rb_right;
Above you are comparing with the inode ptr, here with i_ino. Why can you
not compare with inode both times. Also the insertion only seems to
consider the inode ptr.
Stefan
next prev parent reply other threads:[~2017-08-11 15:01 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-20 22:50 [RFC PATCH 0/5] ima: namespacing IMA audit messages Mehmet Kayaalp
2017-07-20 22:50 ` [RFC PATCH 1/5] ima: extend clone() with IMA namespace support Mehmet Kayaalp
2017-07-25 17:53 ` Serge E. Hallyn
2017-07-25 18:49 ` James Bottomley
2017-07-25 19:04 ` Serge E. Hallyn
2017-07-25 19:08 ` James Bottomley
2017-07-25 19:48 ` Mimi Zohar
2017-07-25 20:11 ` Stefan Berger
2017-07-25 20:46 ` Serge E. Hallyn
2017-07-25 20:57 ` Mimi Zohar
2017-07-25 21:08 ` Serge E. Hallyn
2017-07-25 21:28 ` Mimi Zohar
2017-07-27 12:51 ` [Linux-ima-devel] " Magalhaes, Guilherme (Brazil R&D-CL)
2017-07-27 14:39 ` Mimi Zohar
2017-07-27 17:18 ` Magalhaes, Guilherme (Brazil R&D-CL)
2017-07-27 17:49 ` Stefan Berger
2017-07-27 19:39 ` Magalhaes, Guilherme (Brazil R&D-CL)
2017-07-27 20:51 ` Stefan Berger
2017-07-28 14:19 ` Magalhaes, Guilherme (Brazil R&D-CL)
2017-07-31 11:31 ` Mimi Zohar
2017-07-25 21:35 ` Stefan Berger
2018-03-08 14:04 ` Stefan Berger
2018-03-09 2:59 ` Serge E. Hallyn
2018-03-09 13:52 ` Stefan Berger
2018-03-11 22:58 ` James Morris
2018-03-13 18:02 ` Stefan Berger
2018-03-13 21:51 ` James Morris
2017-07-25 20:31 ` James Bottomley
2017-07-25 20:47 ` Mimi Zohar
2018-03-08 13:39 ` Stefan Berger
2018-03-08 20:19 ` Serge E. Hallyn
[not found] ` <a6ef5679-6aef-21de-7cdb-48e8af83f874@linux.vnet.ibm.com>
2018-03-08 23:31 ` Serge E. Hallyn
2017-07-20 22:50 ` [RFC PATCH 2/5] ima: Add ns_status for storing namespaced iint data Mehmet Kayaalp
2017-07-25 19:43 ` Serge E. Hallyn
2017-07-25 20:15 ` Mimi Zohar
2017-07-25 20:25 ` Stefan Berger
2017-07-25 20:49 ` Serge E. Hallyn
2017-08-11 15:00 ` Stefan Berger [this message]
2017-07-20 22:50 ` [RFC PATCH 3/5] ima: mamespace audit status flags Mehmet Kayaalp
2017-08-01 17:17 ` Tycho Andersen
2017-08-01 17:25 ` Mehmet Kayaalp
2017-08-02 21:48 ` Tycho Andersen
2017-07-20 22:50 ` [RFC PATCH 4/5] ima: differentiate auditing policy rules from "audit" actions Mehmet Kayaalp
2017-07-20 22:50 ` [RFC PATCH 5/5] ima: Add ns_mnt, dev, ino fields to IMA audit measurement msgs Mehmet Kayaalp
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