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SubjectRe: kmemcheck caught read from freed memory (cfq_free_io_context)
On Wed, 2 Apr 2008, Pekka Enberg wrote:

> On Wed, Apr 2, 2008 at 2:08 PM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > but what holds off the slab allocator re-issueing that same object and
> > someone else writing other stuff into it?
>
> Nothing. So you cannot access the object at all after you've called
> kmem_cache_free(). SLAB_RCU or no SLAB_RCU.

You can of course access the object. And if you establish a definite state
of locks on free (and through a ctor) then its even okay to take locks.



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