[OpenAFS] Memory leak with 1.4.1 modules on Linux 2.6.16

[Mathias Feiler]

On Wed, 26 Jul 2006, Jose Calhariz wrote:

|On Fri, Jul 21, 2006 at 11:32:24PM -0700, Caskey L. Dickson wrote:
|>
|> You have created a cycle in your filesystem tree.  Unix tools assume
|> that the structure of the file system is a tree in the ADT sense, name=
ly
|> an acyclic directed graph.  (Thus the default prohibition of making ha=
rd
|> links to directories.)
|>
|> The path /afs/cell/dir/new_cells/cell/dir/new_cells/cell... produces a=
n
|> infinitely deep tree.
|
|I know that was my mistake.
|
|My problem is why the openafs modules consumed all the free RAM on
|the client?  Don't the openafs client or the modules have protections
|in place to prevent following infinity cycles in the path?
|
|Can it be possible for a normal user to create this kind of infinity
|cycles in the path?  And this way to cause a DoS on a multi-user
|server that is client of AFS?

A kinde of YES!

My colleague  injected  this one
	http://rt.central.org/rt/index.html?q=3D+36195
(He just passed me the link, so don't blame me.)

Which actually "substitudes/simulates" the infinitiv directory loop.
Linux 2.6 with Openafs 1.4 crashes, while Linux 2.4 or with Openafs 1.2.*
does not.

On the other hand , user are allowd to mount volumes at their own.....



|
|>
|> CLD
|>
|
|    Jose Calhariz
|
|
|--
|Devo, n=E3o pago. Nego enquanto puder.
|



Fuer Rueckfragen  stehe ich gerne zur Verfuegung,  bevorzuge jedoch  tele=
-
fonische Kontaktaufnahme ( +49 711 459-3949 oder +49 179 6954907 ). Danke=
.


Hochachtungsvoll und mit freundlichen Gruessen   M.Feiler


----
Computer: Es gibt nur 10 Arten von Menschen -
solche die es begreifen und dann noch die andern.

Computer: There are only 10 kinds of people -
those who understand and those who don't.

PGP public key &  Homepage   :  http://www.uni-hohenheim.de/~feiler