Re: [PATCH 1/3] copyfile: generic_sendpage
From: Andrew Morton
Date: Sat Sep 04 2004 - 19:26:50 EST
William Lee Irwin III <wli@xxxxxxxxxxxxxx> wrote:
> On Sat, Sep 04, 2004 at 03:39:02PM -0700, Andrew Morton wrote:
> > I don't know how much of a problem this is in practice - there are all
> > sorts of nasty things which unprivileged apps can do to the system by
> > overloading filesystems. Although most of them can be killed off by the
> > sysadmin.
> > (My infamous bash-shared-mappings stresstest can spend ten or more minutes
> > within a single write() call, but you have to try hard to do this).
> This reminds me; I'm having a chicken and egg problem with several
> stresstests I've written but withheld until fixes for the crashes they
> trigger are available, but the fixes appear to be hard enough to arrange
> they need public commentary to find acceptable methods of addressing
> them. What's the recommended procedure for all this?
A local DoS via resource exhaustion would not be an earth-shatteringly new
development. Just send 'em out.
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