From: Al Viro <viro@ZenIV.linux.org.uk>
To: John Stoffel <john@stoffel.org>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Eric Paris <eparis@redhat.com>,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-fsdevel@vger.kernel.org, hch@infradead.org,
Mimi Zohar <zohar@us.ibm.com>,
warthog9@kernel.org, david@fromorbit.com, jmorris@namei.org,
kyle@mcmartin.ca, hpa@zytor.com, akpm@linux-foundation.org,
mingo@elte.hu
Subject: Re: [PATCH 1/3] IMA: move read/write counters into struct inode
Date: Wed, 20 Oct 2010 14:36:38 +0100 [thread overview]
Message-ID: <20101020133638.GA19804@ZenIV.linux.org.uk> (raw)
In-Reply-To: <19646.59971.76978.642955@quad.stoffel.home>
On Wed, Oct 20, 2010 at 09:10:27AM -0400, John Stoffel wrote:
> Does this mean I can't replace /bin/sh on a running system using IMA
> at all, even if just one process has it opened and is running? So how
> the hell am I supposed to do live upgrades on a system?
rename(2). Prohibition against write(2) to binary being executed is
*old*. Try to do the following:
cp /bin/sh /tmp
/tmp/sh &
cat /bin/ls >/tmp/sh
and you'll get
sh: /tmp/sh: Text file busy
That has nothing to do with IMA...
next prev parent reply other threads:[~2010-10-20 13:37 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-19 1:16 [PATCH 1/3] IMA: move read/write counters into struct inode Eric Paris
2010-10-19 1:16 ` [PATCH 2/3] IMA: only allocate iint when needed Eric Paris
2010-10-19 1:17 ` [PATCH 3/3] IMA: use rbtree instead of radix tree for inode information cache Eric Paris
2010-10-19 1:30 ` [PATCH 1/3] IMA: move read/write counters into struct inode Christoph Hellwig
2010-10-19 2:14 ` Eric Paris
2010-10-19 7:39 ` Dave Chinner
2010-10-19 16:24 ` Eric Paris
2010-10-19 16:29 ` Christoph Hellwig
2010-10-19 8:39 ` Ingo Molnar
2010-10-19 2:46 ` Eric Paris
2010-10-19 15:52 ` Linus Torvalds
2010-10-19 16:36 ` Eric Paris
2010-10-19 16:55 ` Al Viro
2010-10-19 17:03 ` Linus Torvalds
2010-10-19 17:03 ` Linus Torvalds
2010-10-19 17:28 ` Al Viro
2010-10-19 18:16 ` Mimi Zohar
2010-10-20 13:10 ` John Stoffel
2010-10-20 13:36 ` Al Viro [this message]
2010-10-20 14:09 ` John Stoffel
2010-10-19 19:11 ` Matthew Wilcox
2010-10-20 3:15 ` Al Viro
2010-10-20 17:38 ` J. Bruce Fields
2010-10-19 22:49 ` Eric Paris
2010-10-20 14:38 ` Ingo Molnar
2010-10-20 14:46 ` Eric Paris
2010-10-20 15:15 ` Ingo Molnar
2010-10-20 15:25 ` Eric Paris
2010-10-21 16:15 ` Casey Schaufler
2010-10-22 8:48 ` Ingo Molnar
2010-10-22 17:50 ` Casey Schaufler
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