qemu got sigabrt when using vpp in guest and dpdk for qemu Description of problem: When set the interface up in vpp, the qemu process is crashed with signal sigabrt. After some debug, i have identified that the problem lies in the following function. ```c static int setup_routing_entry(struct kvm *kvm, struct kvm_irq_routing_table *rt, struct kvm_kernel_irq_routing_entry *e, const struct kvm_irq_routing_entry *ue) { struct kvm_kernel_irq_routing_entry *ei; int r; u32 gsi = array_index_nospec(ue->gsi, KVM_MAX_IRQ_ROUTES); /* * Do not allow GSI to be mapped to the same irqchip more than once. * Allow only one to one mapping between GSI and non-irqchip routing. */ hlist_for_each_entry(ei, &rt->map[gsi], link) if (ei->type != KVM_IRQ_ROUTING_IRQCHIP || ue->type != KVM_IRQ_ROUTING_IRQCHIP || ue->u.irqchip.irqchip == ei->irqchip.irqchip) return -EINVAL; ``` I added some debug printk like following ```c hlist_for_each_entry(ei, &rt->map[gsi], link) if (ei->type != KVM_IRQ_ROUTING_IRQCHIP || ue->type != KVM_IRQ_ROUTING_IRQCHIP || ue->u.irqchip.irqchip == ei->irqchip.irqchip){ printk("ei->type: %u, KVM_IRQ_ROUTING_IRQCHIP: %u, ue->type: %u, ue->u.irqchip.irqchip: %u , ei->irqchip.irqchip: %u", ei->type, KVM_IRQ_ROUTING_IRQCHIP , ue->type, ue->u.irqchip.irqchip , ei->irqchip.irqchip); return -EINVAL; } ``` Then i got following in dmesg ``` [Thu Nov 23 09:29:10 2023] ei->type: 2, KVM_IRQ_ROUTING_IRQCHIP: 1, ue->type: 1, ue->u.irqchip.irqchip: 2 , ei->irqchip.irqchip: 4276097024 [Thu Nov 23 09:29:10 2023] ei->type: 2, KVM_IRQ_ROUTING_IRQCHIP: 1, ue->type: 1, ue->u.irqchip.irqchip: 2 , ei->irqchip.irqchip: 4276097024 ``` Steps to reproduce: This is a kube-ovn + dpdk env, not easy to reproduce now.. Additional information: * I also file a bug on kernel.org: https://bugzilla.kernel.org/show_bug.cgi?id=218177 * the libvirt xml file is also attached [instance.xml](/uploads/05b391046fdc1263fd7e63bcfab6f4fb/instance.xml)