From: Peter Chubb <peterc@gelato.unsw.edu.au>
To: Oren Laadan <orenl@cs.columbia.edu>
Cc: "Serge E. Hallyn" <serue@us.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
torvalds@linux-foundation.org,
containers@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-api@vger.kernel.org, tglx@linutronix.de,
dave@linux.vnet.ibm.com, mingo@elte.hu, hpa@zytor.com,
viro@zeniv.linux.org.uk
Subject: Re: [RFC v7][PATCH 2/9] General infrastructure for checkpoint restart
Date: Mon, 27 Oct 2008 19:27:52 +1100 [thread overview]
Message-ID: <87tzayh27r.wl%peter@chubb.wattle.id.au> (raw)
In-Reply-To: <48FF4EB2.5060206@cs.columbia.edu>
>>>>> "Oren" == Oren Laadan <orenl@cs.columbia.edu> writes:
Oren> Nope, since we will fail to restart in many cases. We will need
Oren> a way to move from caller's credentials to saved credentials,
Oren> and even from caller's credentials to privileged credentials
Oren> (e.g. to reopen a file that was created by a setuid program
Oren> prior to dropping privileges).
You can't necessarily tell the difference between this and revocation
of privilege. For most security models, it must be possible to change
the permissions on the file, and then the restart should fail.
In our implementation, we simply refused to checkpoint setid programs.
--
Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au
http://www.ertos.nicta.com.au ERTOS within National ICT Australia
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next prev parent reply other threads:[~2008-10-27 8:27 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-20 5:40 [RFC v7][PATCH 0/9] Kernel based checkpoint/restart Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 1/9] Create syscalls: sys_checkpoint, sys_restart Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 2/9] General infrastructure for checkpoint restart Oren Laadan
2008-10-21 19:41 ` Andrew Morton
2008-10-21 20:24 ` Serge E. Hallyn
2008-10-21 20:41 ` Andrew Morton
2008-10-22 1:33 ` Oren Laadan
2008-10-22 2:55 ` Daniel Jacobowitz
2008-10-22 3:02 ` Dave Hansen
2008-10-22 14:29 ` Daniel Jacobowitz
2008-10-22 15:28 ` Serge E. Hallyn
2008-10-22 16:02 ` Oren Laadan
2008-10-22 17:03 ` Serge E. Hallyn
2008-10-22 18:32 ` Oren Laadan
2008-10-27 8:27 ` Peter Chubb [this message]
2008-10-27 11:03 ` Oren Laadan
2008-10-27 16:42 ` Dave Hansen
2008-10-27 17:11 ` Oren Laadan
2008-10-27 20:51 ` Matt Helsley
2008-10-27 21:20 ` Serge E. Hallyn
2008-10-27 21:51 ` Oren Laadan
2008-10-27 22:09 ` Dave Hansen
2008-10-28 18:33 ` Serge E. Hallyn
2008-10-20 5:40 ` [RFC v7][PATCH 3/9] x86 support for checkpoint/restart Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 4/9] Dump memory address space Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 5/9] Restore " Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 6/9] Checkpoint/restart: initial documentation Oren Laadan
2008-10-28 16:48 ` Michael Kerrisk
2008-10-20 5:40 ` [RFC v7][PATCH 7/9] Infrastructure for shared objects Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 8/9] Dump open file descriptors Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 9/9] Restore open file descriprtors Oren Laadan
2008-10-21 19:21 ` [RFC v7][PATCH 0/9] Kernel based checkpoint/restart Andrew Morton
2008-10-21 20:41 ` Dave Hansen
2008-10-22 9:20 ` Ingo Molnar
2008-10-22 11:51 ` Daniel Lezcano
2008-10-22 11:55 ` Cedric Le Goater
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