Re: [PATCH v3 07/35] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj_ext creation

Kees Cook
2024-02-12T22:14:57Z

On Mon, Feb 12, 2024 at 01:38:53PM -0800, Suren Baghdasaryan wrote:
> Slab extension objects can't be allocated before slab infrastructure is
> initialized. Some caches, like kmem_cache and kmem_cache_node, are created
> before slab infrastructure is initialized. Objects from these caches can't
> have extension objects. Introduce SLAB_NO_OBJ_EXT slab flag to mark these
> caches and avoid creating extensions for objects allocated from these
> slabs.
>
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>

Reviewed-by: Kees Cook <keescook@chromium.org>

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Kees Cook