linux-kernel - Re: [malware-list] [RFC 0/5] [TALPA] Intro to a linux interface for on access scanning

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Message-ID: <20080805122503.73ea5416@lxorguk.ukuu.org.uk>
Date:	Tue, 5 Aug 2008 12:25:03 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Greg KH <greg@...ah.com>
Cc:	Eric Paris <eparis@...hat.com>, malware-list@...ts.printk.net,
	linux-kernel@...r.kernel.org
Subject: Re: [malware-list] [RFC 0/5] [TALPA] Intro to a linux interface for
 on access scanning

> Again, do it all in userspace (caching, and scanning).  I still really
> don't see the need to do this in the kernel becides it being "the way
> people have always done it."

We don't have notifiers for file segment changes that are scalable that
far. We don't have mechanisms for delaying an open for a scan.

There are various bits of this you can't just do in user space. This
doesn't just hurt virus scanners btw its also bad news for indexing disk
content.
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