linux-kernel - Re: fanotify as syscalls

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Date:	Wed, 23 Sep 2009 07:20:19 -0400
From:	"hch@...radead.org" <hch@...radead.org>
To:	Tvrtko Ursulin <tvrtko.ursulin@...hos.com>
Cc:	Davide Libenzi <davidel@...ilserver.org>,
	Andreas Gruenbacher <agruen@...e.de>,
	Jamie Lokier <jamie@...reable.org>,
	Eric Paris <eparis@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Evgeniy Polyakov <zbr@...emap.net>,
	David Miller <davem@...emloft.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
	"alan@...ux.intel.com" <alan@...ux.intel.com>,
	"hch@...radead.org" <hch@...radead.org>
Subject: Re: fanotify as syscalls

On Wed, Sep 23, 2009 at 09:39:33AM +0100, Tvrtko Ursulin wrote:
> Lived with it because there was no other option. We used LSM while it was 
> available for modules but then it was taken away. 
> 
> And not all vendors even use syscall interception, not even across platforms, 
> of which you sound so sure about. You can't even scan something which is not 
> in your namespace if you are at the syscall level. And you can't catch things 
> like kernel nfsd. No, syscall interception is not really appropriate at all.

The "Anti-Malware" industry is just snake oil anyway.  I think the
proper approach to support it is just to add various no-op exports claim
to do something and all the people requiring anti-virus on Linux will be
just as happy with it.

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