[PATCH 3/3] irqchip/gic-v3-its: Clear vpt_page after freeing the pending table

[Fuad Tabba <fuad.tabba@linux.dev>]

its_vpe_teardown() frees vpt_page without clearing it, so its
vpt_page == NULL guard only holds the first time it runs on a vPE.
struct its_vpe outlives a failed KVM_DEV_ARM_VGIC_CTRL_INIT, so a retry
that fails again frees the pending table and the vPE ID a second time.

Fixes: 325ff3e78c64c ("irqchip/gic-v3-its: Prevent leak in its_vpe_irq_domain_alloc()")
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
---
 drivers/irqchip/irq-gic-v3-its.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 81a96149f9154..f5d89e829c168 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -4599,6 +4599,7 @@ static void its_vpe_teardown(struct its_vpe *vpe)
 	its_vpe_db_proxy_unmap(vpe);
 	its_vpe_id_free(vpe->vpe_id);
 	its_free_pending_table(vpe->vpt_page);
+	vpe->vpt_page = NULL;
 }
 
 static void its_vpe_irq_domain_free(struct irq_domain *domain,
-- 
2.39.5