[PATCH] KVM: arm64: Fix memory check in host_stage2_set_owner_locked()

From: Mostafa Saleh
Date: Thu May 01 2025 - 12:25:22 EST


I found this simple bug while preparing some patches for pKVM.
AFAICT, it should be harmless (besides crashing the kernel if it
was misbehaving)

Fixes: e94a7dea2972 ("KVM: arm64: Move host page ownership tracking to the hyp vmemmap")
Signed-off-by: Mostafa Saleh <smostafa@xxxxxxxxxx>
---
arch/arm64/kvm/hyp/nvhe/mem_protect.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
index 2a5284f749b4..e80f3ebd3e2a 100644
--- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c
+++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
@@ -503,7 +503,7 @@ int host_stage2_set_owner_locked(phys_addr_t addr, u64 size, u8 owner_id)
{
int ret;

- if (!addr_is_memory(addr))
+ if (!range_is_memory(addr, addr + size))
return -EPERM;

ret = host_stage2_try(kvm_pgtable_stage2_set_owner, &host_mmu.pgt,
--
2.49.0.906.g1f30a19c02-goog