From: Christoph Hellwig <hch@lst.de>
To: NeilBrown <neilb@suse.de>
Cc: Christoph Hellwig <hch@lst.de>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
David Howells <dhowells@redhat.com>,
torvalds@linux-foundation.org, trond.myklebust@primarydata.com,
linux-nfs@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Don't block writes to swap-files with ETXTBSY.
Date: Sat, 28 Aug 2021 09:10:14 +0200 [thread overview]
Message-ID: <20210828071014.GA31677@lst.de> (raw)
In-Reply-To: <163010581548.7591.7557563272768619093@noble.neil.brown.name>
On Sat, Aug 28, 2021 at 09:10:15AM +1000, NeilBrown wrote:
> There are lots of different things root can do which will mess up the
> kernel badly. The backing-store can still be changed through some other
> means.
> Do you have a particular threat or risk scenario other than "root might
> get careless"?
No, it is just that scenario. But one that is much easier to trigger
than more convoluted ways for a root user to trigger damage through
device files, and one that can't be prevented through LSMs or the
capability system.
prev parent reply other threads:[~2021-08-28 7:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-25 23:57 [PATCH] Don't block writes to swap-files with ETXTBSY NeilBrown
2021-08-27 15:16 ` Christoph Hellwig
2021-08-27 23:10 ` NeilBrown
2021-08-28 7:10 ` Christoph Hellwig [this message]
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