Re: [PATCH] KVM: arm64: Use kmemleak_free_part_phys() to unregister hyp_mem_base

Oliver Upton
2022-09-14T11:08:28Z

On Thu, Sep 08, 2022 at 09:06:59PM +0800, Zenghui Yu wrote:
> With commit 0c24e061196c ("mm: kmemleak: add rbtree and store physical
> address for objects allocated with PA"), kmemleak started to put the
> objects allocated with physical address onto object_phys_tree_root tree.
> The kmemleak_free_part() therefore no longer worked as expected on
> physically allocated objects (hyp_mem_base in this case) as it attempted to
> search and remove things in object_tree_root tree.
>
> Fix it by using kmemleak_free_part_phys() to unregister hyp_mem_base. This
> fixes an immediate crash when booting a KVM host in protected mode with
> kmemleak enabled.
>
> Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>

Reviewed-by: Oliver Upton <oliver.upton@linux.dev>

Marc or Paolo, do one of you want to pick this patch up? Looks like a
good fix.

--
Thanks,
Oliver