Re: [PATCH 02/11] mm,migration: Do not try to migrate unmapped anonymous pages

[KAMEZAWA Hiroyuki]

On Wed, 17 Mar 2010 11:41:10 -0500 (CDT)
Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> wrote:

> On Wed, 17 Mar 2010, KAMEZAWA Hiroyuki wrote:
> 
> > Ah, my point is "how use-after-free is detected ?"
> 
> The slab layers do not check for use after free conditions if
> SLAB_DESTROY_BY_RCU is set. It is legal to access the object after a
> kfree() etc as long as the RCU period has not passed.
> 
> > Then, my question is
> > "Does use-after-free check for SLAB_DESTROY_BY_RCU work correctly ?"
> 
> Use after free checks are not performed for SLAB_DESTROY_BY_RCU slabs.
> 
Thank you for kindly clarification. I have no more concerns.

Thanks,
-Kame


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