Re: [PATCH] mm: Add additional consistency check
From: Christoph Lameter
Date: Tue Apr 11 2017 - 14:30:58 EST
On Fri, 31 Mar 2017, Kees Cook wrote:
> As found in PaX, this adds a cheap check on heap consistency, just to
> notice if things have gotten corrupted in the page lookup.
Ok this only affects kmem_cache_free() and not kfree(). For
kmem_cache_free() we already have a lot of stuff in the hotpath due to
cgruops. If you want this also for kfree() then we need a separate patch.
Also for kmem_cache_free(): Here we always have a slab cache and thus we
could check the flags that could modify what behavior we want.
Acked-by: Christoph Lameter <cl@xxxxxxxxx>