Re: + fix-null-pointer-dereference-in-__vm_enough_memory.patch added to -mm tree

[James Morris <jmorris@namei.org>]

On Wed, 15 Aug 2007, akpm@linux-foundation.org wrote:

> ------------------------------------------------------
> Subject: fix NULL pointer dereference in __vm_enough_memory()
> From: Alan Cox <alan@lxorguk.ukuu.org.uk>
> 
> The new exec code inserts an accounted vma into an mm struct which is not
> current->mm.  The existing memory check code has a hard coded assumption
> that this does not happen as does the security code.
> 
> As the correct mm is known we pass the mm to the security method and the
> helper function.  A new security test is added for the case where we need
> to pass the mm and the existing one is modified to pass current->mm to
> avoid the need to change large amounts of code.
> 
> (Thanks to Tobias for fixing rejects and testing)
> 
> Signed-off-by: Alan Cox <alan@redhat.com>
> Cc: WU Fengguang <wfg@mail.ustc.edu.cn>
> Cc: James Morris <jmorris@redhat.com>
> Cc: Tobias Diedrich <ranma+kernel@tdiedrich.de>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Acked-by: James Morris <jmorris@namei.org>



-- 
James Morris
<jmorris@namei.org>