6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marc Zyngier <maz@xxxxxxxxxx>
commit d561491ba927cb5634094ff311795e9d618e9b86 upstream.
Make sure we filter out non-LPI invalidation when handling writes
to GICR_INVLPIR.
Fixes: 4645d11f4a553 ("KVM: arm64: vgic-v3: Implement MMIO-based LPI invalidation")
Reported-by: Alexander Potapenko <glider@xxxxxxxxxx>
Tested-by: Alexander Potapenko <glider@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20241117165757.247686-2-maz@xxxxxxxxxx
Signed-off-by: Oliver Upton <oliver.upton@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kvm/vgic/vgic-mmio-v3.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
@@ -530,6 +530,7 @@ static void vgic_mmio_write_invlpi(struc
unsigned long val)
{
struct vgic_irq *irq;
+ u32 intid;
/*
* If the guest wrote only to the upper 32bit part of the
@@ -541,9 +542,13 @@ static void vgic_mmio_write_invlpi(struc
if ((addr & 4) || !vgic_lpis_enabled(vcpu))
return;
+ intid = lower_32_bits(val);
+ if (intid < VGIC_MIN_LPI)
+ return;
+
vgic_set_rdist_busy(vcpu, true);
- irq = vgic_get_irq(vcpu->kvm, NULL, lower_32_bits(val));
+ irq = vgic_get_irq(vcpu->kvm, NULL, intid);
if (irq) {
vgic_its_inv_lpi(vcpu->kvm, irq);
vgic_put_irq(vcpu->kvm, irq);
