Messages in this thread | | | Subject | Re: [patch 4/4] change slab poison pattern | From | Pekka Enberg <> | Date | Mon, 24 Apr 2006 12:20:03 +0300 |
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Hi,
On Mon, 2006-04-24 at 16:33 +0800, Akinobu Mita wrote: > kref debugging cannot detect kref_put() with unreferenced object, > when the structure including kref is allocated by slab > and slab debugging config is enabled. > > Because use-after-free poisoning make kref counter signed value. > So this patch prevents it by changing poisoning pattern.
Then why not check against POISON_INUSE when CONFIG_SLAB_DEBUG in the kref debugging code? I would prefer you didn't change the slab constants (they're well known by everyone now) but if you must, at least stick a big fat comment there.
Pekka
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