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

Zenghui Yu
2022-09-08T13:09:30Z

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>
---
arch/arm64/kvm/arm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 09e726711631..951070c4831d 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2114,7 +2114,7 @@ static int finalize_hyp_mode(void)
* at, which would end badly once inaccessible.
*/
kmemleak_free_part(__hyp_bss_start, __hyp_bss_end - __hyp_bss_start);
- kmemleak_free_part(__va(hyp_mem_base), hyp_mem_size);
+ kmemleak_free_part_phys(hyp_mem_base, hyp_mem_size);
return pkvm_drop_host_privileges();
}

--
2.33.0