3.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Avi Kivity <[email protected]> commit f2ebd422f71cda9c791f76f85d2ca102ae34a1ed upstream. kvm_set_irq() has an internal buffer of three irq routing entries, allowing connecting a GSI to three IRQ chips or on MSI. However setup_routing_entry() does not properly enforce this, allowing three irqchip routes followed by an MSI route to overflow the buffer. Fix by ensuring that an MSI entry is added to an empty list. Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Ben Hutchings <[email protected]> Cc: Li Zefan <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- virt/kvm/irq_comm.c | 1 + 1 file changed, 1 insertion(+) --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -318,6 +318,7 @@ static int setup_routing_entry(struct kv */ hlist_for_each_entry(ei, n, &rt->map[ue->gsi], link) if (ei->type == KVM_IRQ_ROUTING_MSI || + ue->type == KVM_IRQ_ROUTING_MSI || ue->u.irqchip.irqchip == ei->irqchip.irqchip) return r; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
