lkml.org 
[lkml]   [2000]   [Sep]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: the new VMt
On Mon, Sep 25, 2000 at 04:47:21PM -0400, Benjamin C.R. LaHaise wrote:
> On Mon, 25 Sep 2000 yodaiken@fsmlabs.com wrote:
>
> > On Mon, Sep 25, 2000 at 09:23:48PM +0100, Alan Cox wrote:
> > > > my prediction is that if you show me an example of
> > > > DoS vulnerability, I can show you fix that does not require bean counting.
> > > > Am I wrong?
> > >
> > > I think so. Page tables are a good example
> >
> > I'm not too sure of what you have in mind, but if it is
> > "process creates vast virtual space to generate many page table
> > entries -- using mmap"
> > the answer is, virtual address space quotas and mmap should kill
> > the process on low mem for page tables.
>
> No. Page tables are not freed after munmap (and for good reason). The
> counting of page table "beans" is critical.

I've seen the assertion before, reasons would be interesting.


--
---------------------------------------------------------
Victor Yodaiken
Finite State Machine Labs: The RTLinux Company.
www.fsmlabs.com www.rtlinux.com

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:03    [W:0.163 / U:2.276 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site