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From: Andrew Morton <akpm@osdl.org>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: manfred@colorfullife.com, drepper@redhat.com,
	linux-kernel@vger.kernel.org
Subject: Re: message queue limits
Date: Thu, 15 Apr 2004 15:54:08 -0700	[thread overview]
Message-ID: <20040415155408.0902a0c0.akpm@osdl.org> (raw)
In-Reply-To: <20040415214632.GA4402@logos.cnet>

Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote:
>
> This adds a new "RLIMIT_SIGPENDING" limit, which is used to limit
> per-uid pending signals. Currently an unpriviledged user can queue 
> more than maximum of allowed signals and cause overall system 
> malfunction.

So now it takes two users to gang up and do the same thing.  We should
either exempt root from the global check or simply remove the global limit
altogether.

Is it possible for a process to do setuid() with outstanding signals?  If
so, they may end up with a negative current->user->signal_pending?

You need to initialise ->signal_pending in alloc_uid().

What are you doing for testing of this?

Thanks.

  reply	other threads:[~2004-04-15 22:52 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-12  5:48 Ulrich Drepper
2004-04-13 20:16 ` Bill Davidsen
2004-04-15 14:53 ` Marcelo Tosatti
2004-04-15 19:24   ` Andrew Morton
2004-04-15 19:54     ` Marcelo Tosatti
2004-04-15 21:46       ` Marcelo Tosatti
2004-04-15 22:54         ` Andrew Morton [this message]
2004-04-16  0:10           ` Marcelo Tosatti
2004-04-16  1:48             ` Andrew Morton
2004-04-16 13:13               ` Marcelo Tosatti
     [not found] ` <20040415141846.GE2085@logos.cnet>
     [not found]   ` <407EB08D.4010607@colorfullife.com>
2004-04-16 14:06     ` Marcelo Tosatti
2004-04-16 21:35       ` Andrew Morton

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