4.19-stable review patch. If anyone has any objections, please let me know.
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From: Oliver Upton oliver.upton@linux.dev
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 --- virt/kvm/arm/vgic/vgic-its.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -469,6 +469,9 @@ static int its_sync_lpi_pending_table(st }
irq = vgic_get_irq(vcpu->kvm, NULL, intids[i]); + if (!irq) + continue; + spin_lock_irqsave(&irq->irq_lock, flags); irq->pending_latch = pendmask & (1U << bit_nr); vgic_queue_irq_unlock(vcpu->kvm, irq, flags);