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KVM: arm64: Destroy stage-2 page-table in kvm_arch_destroy_vm()

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kvm_arch_destroy_vm() can be called on the kvm_create_vm() error path
after we have failed to register the MMU notifiers for the new VM. In
this case, we cannot rely on the MMU ->release() notifier to call
kvm_arch_flush_shadow_all() and so the stage-2 page-table allocated in
kvm_arch_init_vm() will be leaked.

Explicitly destroy the stage-2 page-table in kvm_arch_destroy_vm(), so
that we clean up after kvm_arch_destroy_vm() without relying on the MMU
notifiers.

Link: https://sashiko.dev/#/patchset/20260327140039.21228-1-will%40kernel.org?patch=12265
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260327192758.21739-3-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Will Deacon 2026-03-27 19:27:57 +00:00 committed by Marc Zyngier
parent 2fc0f3e2b9
commit a3ca3bfd01
1 changed files with 1 additions and 0 deletions
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arch/arm64/kvm/arm.c
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@ -301,6 +301,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
if (is_protected_kvm_enabled())
pkvm_destroy_hyp_vm(kvm);
kvm_uninit_stage2_mmu(kvm);
kvm_destroy_mpidr_data(kvm);
kfree(kvm->arch.sysreg_masks);