Messages in this thread | | | Date | Wed, 17 Mar 2010 11:41:10 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 02/11] mm,migration: Do not try to migrate unmapped anonymous pages |
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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.
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