From: Stephen Smalley <sds-+05T5uksL2qpZYMLLGbcSA@public.gmane.org>
To: "Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
SELinux <selinux-+05T5uksL2qpZYMLLGbcSA@public.gmane.org>,
Linux Containers
<containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>,
Alexey Dobriyan
<adobriyan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Andrew Morgan <morgan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 10/10] cr: lsm: restore file->f_security
Date: Wed, 10 Jun 2009 09:54:50 -0400 [thread overview]
Message-ID: <1244642090.20265.144.camel@localhost.localdomain> (raw)
In-Reply-To: <20090610014704.GI5658-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
On Tue, 2009-06-09 at 20:47 -0500, Serge E. Hallyn wrote:
> file->f_cred is the cred of the task which opened it. file->f_security
> can be separately set by the LSM. Checkpoint the file->f_security,
> and at restart ask the LSM, using security_file_restore, based on the current
> task's context and the checkpointed f_security, which f_security to apply (or
> whether to refuse the restart altogether).
>
> For Smack, accept the checkpointed label if the restarting task has
> CAP_MAC_ADMIN.
>
> For SELinux, I currently ignore the checkpointed label and call
> file_alloc_security(). Do we want to have 'restore' permission for
> class file?
Yes - otherwise we'll end up with a restarted process that may not be
able to access its open files.
--
Stephen Smalley
National Security Agency
prev parent reply other threads:[~2009-06-10 13:54 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-10 1:44 [PATCH 01/10] cred: #include init.h in cred.h Serge E. Hallyn
[not found] ` <20090610014412.GA5628-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-06-10 1:44 ` [PATCH 02/10] groups: move code to kernel/groups.c Serge E. Hallyn
2009-06-10 1:44 ` [PATCH 03/10] cr: break out new_user_ns() Serge E. Hallyn
2009-06-10 1:44 ` [PATCH 04/10] cr: split core function out of some set*{u,g}id functions Serge E. Hallyn
[not found] ` <20090610014456.GC5658-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-06-10 12:20 ` James Morris
2009-06-10 12:51 ` Serge E. Hallyn
2009-06-10 1:45 ` [PATCH 05/10] cr: ipc: reset kern_ipc_perms Serge E. Hallyn
2009-06-10 1:45 ` [PATCH 06/10] cr: capabilities: define checkpoint and restore fns Serge E. Hallyn
2009-06-10 1:46 ` [PATCH 07/10] cr: checkpoint and restore task credentials Serge E. Hallyn
2009-06-10 1:46 ` [PATCH 08/10] cr: restore file->f_cred Serge E. Hallyn
2009-06-10 1:46 ` [PATCH 09/10] cr: restore LSM credentials Serge E. Hallyn
[not found] ` <20090610014637.GH5658-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-06-10 3:24 ` Casey Schaufler
2009-06-10 13:54 ` Stephen Smalley
[not found] ` <1244642042.20265.143.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2009-06-10 14:59 ` Serge E. Hallyn
2009-06-10 1:47 ` [PATCH 10/10] cr: lsm: restore file->f_security Serge E. Hallyn
[not found] ` <20090610014704.GI5658-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-06-10 3:39 ` Casey Schaufler
[not found] ` <4A2F2B08.40701-iSGtlc1asvQWG2LlvL+J4A@public.gmane.org>
2009-06-10 13:58 ` Serge E. Hallyn
2009-06-10 13:54 ` Stephen Smalley [this message]
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