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