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

[James Morris]

On Wed, 15 Aug 2007, akpm@xxxxxxxxxxxxxxxxxxxx wrote:

> ------------------------------------------------------
> Subject: fix NULL pointer dereference in __vm_enough_memory()
> From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
> 
> 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@xxxxxxxxxx>
> Cc: WU Fengguang <wfg@xxxxxxxxxxxxxxxx>
> Cc: James Morris <jmorris@xxxxxxxxxx>
> Cc: Tobias Diedrich <ranma+kernel@xxxxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>

Acked-by: James Morris <jmorris@xxxxxxxxx>



-- 
James Morris
<jmorris@xxxxxxxxx>
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