6.6-stable review patch. If anyone has any objections, please let me know.
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From: Marc Zyngier maz@kernel.org
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@google.com Tested-by: Alexander Potapenko glider@google.com Signed-off-by: Marc Zyngier maz@kernel.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20241117165757.247686-2-maz@kernel.org Signed-off-by: Oliver Upton oliver.upton@linux.dev Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -555,6 +555,7 @@ 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 @@ -566,9 +567,13 @@ 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);