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

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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: 33d3bc9556a7 ("KVM: arm64: vgic-its: Read initial LPI pending table")
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240221092732.4126848-2-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oliver Upton 2024-02-21 09:27:31 +00:00 • committed by Ksawlii
parent 7264f2238c
commit 6d6fb2d351
1 changed files with 3 additions and 0 deletions
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3
arch/arm64/kvm/vgic/vgic-its.c
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@ -462,6 +462,9 @@ static int its_sync_lpi_pending_table(struct kvm_vcpu *vcpu)
} }
irq = vgic_get_irq(vcpu->kvm, NULL, intids[i]); irq = vgic_get_irq(vcpu->kvm, NULL, intids[i]);
if (!irq)
continue;
raw_spin_lock_irqsave(&irq->irq_lock, flags); raw_spin_lock_irqsave(&irq->irq_lock, flags);
irq->pending_latch = pendmask & (1U << bit_nr); irq->pending_latch = pendmask & (1U << bit_nr);
vgic_queue_irq_unlock(vcpu->kvm, irq, flags); vgic_queue_irq_unlock(vcpu->kvm, irq, flags);