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Commit 68799371 authored by Oliver Upton's avatar Oliver Upton Committed by Greg Kroah-Hartman
Browse files

KVM: arm64: vgic-its: Test for valid IRQ in its_sync_lpi_pending_table() 



commit 8d3a7dfb801d157ac423261d7cd62c33e95375f8 upstream.

vgic_get_irq() may not return a valid descriptor if there is no ITS that
holds a valid translation for the specified INTID. If that is the case,
it is safe to silently ignore it and continue processing the LPI pending
table.

Cc: stable@vger.kernel.org
Fixes: 33d3bc95 ("KVM: arm64: vgic-its: Read initial LPI pending table")
Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240221092732.4126848-2-oliver.upton@linux.dev


Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6e1f54a4

virt/kvm/arm/vgic/vgic-its.c

+3 −0
Original line number Diff line number Diff line
@@ -459,6 +459,9 @@ static int its_sync_lpi_pending_table(struct kvm_vcpu *vcpu) 
		}



		irq = vgic_get_irq(vcpu->kvm, NULL, intids[i]);

		if (!irq)

			continue;



		raw_spin_lock_irqsave(&irq->irq_lock, flags);

		irq->pending_latch = pendmask & (1U << bit_nr);

		vgic_queue_irq_unlock(vcpu->kvm, irq, flags);