[PATCH v2] KVM: arm64: vgic: free private_irqs when init fails after allocation

[Michael Bommarito <michael.bommarito@gmail.com>]

Companion to commit 250f25367b58 ("KVM: arm64: Tear down vGIC on
failed vCPU creation"), which added the missing kvm_vgic_vcpu_destroy()
call to the kvm_share_hyp() failure path in kvm_arch_vcpu_create(). The
kvm_vgic_vcpu_init() failure path immediately above it has the same
shape and still needs the same cleanup.

Call kvm_vgic_vcpu_destroy() when kvm_vgic_vcpu_init() fails so private
IRQs allocated before a redistributor iodev registration failure are
released before the failed vCPU is freed.

Fixes: 03b3d00a70b5 ("KVM: arm64: vgic: Allocate private interrupts on demand")
Cc: stable@vger.kernel.org
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Yuan Yao <yaoyuan@linux.alibaba.com>
Assisted-by: Claude:claude-opus-4-7
Signed-off-by: Michael Bommarito <michael.bommarito@gmail.com>
---
Changes in v2:
- Add the Fixes tag Marc agreed with.
- Add Yao's Reviewed-by tag.
- Trim the commit message.

 arch/arm64/kvm/arm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 176cbe8baad30..5d5e2f81b9c94 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -554,8 +554,10 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 	kvm_destroy_mpidr_data(vcpu->kvm);
 
 	err = kvm_vgic_vcpu_init(vcpu);
-	if (err)
+	if (err) {
+		kvm_vgic_vcpu_destroy(vcpu);
 		return err;
+	}
 
 	err = kvm_share_hyp(vcpu, vcpu + 1);
 	if (err)
-- 
2.53.0