linux-kernel - Re: [PATCH 0/3] Add O_DENY* flags to fcntl and cifs

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Date:	Wed, 12 Dec 2012 08:34:01 +0000
From:	David Laight <david@....co.uk>
To:	Pavel Shilovsky <piastry@...rsoft.ru>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-cifs@...r.kernel.org,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	wine-devel@...ehq.org
Subject: Re: [PATCH 0/3] Add O_DENY* flags to fcntl and cifs

On Sat, Dec 08, 2012 at 12:43:14AM +0400, Pavel Shilovsky wrote:
> 
> The problem is the possibility of denial-of-service attacks here. We 
> can try to prevent them by:

FWIW I already see a DoS 'attack'.
I have some filestore shared using NFS (to Linux and Solaris) and 
using samba (to Windows).

I use it for release builds of a product to ensure the versions
built for the different operating systems match, and because some
files have to be built on an 'alien' system (eg gcc targetted at
embedded card).

I can't run the windows build at the same time as the others
because the windows C compiler manages to obtain exclusive access
to the source files - stopping the other systems from reading them.

	David

-- 
David Laight: david@....co.uk
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