Stuart Henderson <s...@spacehopper.org> wrote:

> On 2020/04/07 18:01, Stefan Sperling wrote:
> > On Tue, Apr 07, 2020 at 09:51:15AM -0600, Theo de Raadt wrote:
> > > Stefan Sperling <s...@stsp.name> wrote:
> > > 
> > > > On Tue, Apr 07, 2020 at 09:37:02AM -0600, Theo de Raadt wrote:
> > > > > > The idea was to have /var/www/tmp created by default, but with
> > > > > > www:www ownership.
> > > >  
> > > > > Create the directory.  Now as a user, completely fill it.
> > > > 
> > > > The proposal is to create tmp with www:www ownership, writable only for
> > > > that user, not like the old /var/tmp which was writable by anyone.
> > > 
> > > That's not true; the diff created it mode 1777.
> > 
> > Ah, I missed that. Yes that would be a problem in the diff.
> > 
> > > A smaller secondary concern is if you can convince software using this 
> > > space,
> > > from remote, to hog the space too much, and/or lose track of files in 
> > > there.
> > > Which would also create the fallout problems of "/var is full".
> > > 
> > > It's a matter of how other /var-using software misbehaves or fails in
> > > those circumstances.  These concerns have been ignored too long.
> > 
> > Yes, absolutely correct. Logs or tempfiles filling up /var are a problem,
> > and in the gotweb application Tracey and I created it is indeed possible
> > for requests to trigger large tempfiles. We need to look at that and come
> > up with a better solution.
> > We could check whether httpd/slowcgi could help with this somehow and try
> > to come up with something that works for any application and not just ours.
> > 
> 
> fwiw my usual approach is to put /var/www on a separate filesystem ..

That's my approach also.

But now /var/www can get filled.  The problem is how will /tmp files be
handled?  Sloppily, I predict.

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