IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready Illegal XDP return value 4294967274, expect packet loss! IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready ------------[ cut here ]------------ IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready WARNING: CPU: 1 PID: 9448 at net/core/filter.c:3647 bpf_warn_invalid_xdp_action net/core/filter.c:3647 [inline] WARNING: CPU: 1 PID: 9448 at net/core/filter.c:3647 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3643 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9448 Comm: syz-executor.5 Not tainted 4.14.239-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 __warn.cold+0x20/0x44 kernel/panic.c:547 report_bug+0x208/0x250 lib/bug.c:183 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 RIP: 0010:bpf_warn_invalid_xdp_action net/core/filter.c:3647 [inline] RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 net/core/filter.c:3643 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 RSP: 0018:ffff8880ba507190 EFLAGS: 00010282 RAX: 0000000000000038 RBX: 1ffff110174a0e3b RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff878bbbc0 RDI: ffffed10174a0e28 RBP: ffffffff885634c0 R08: 0000000000000038 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea R13: ffffc9001294a000 R14: 0000000000000000 R15: ffff8880991a5286 netif_receive_generic_xdp+0x554/0x950 net/core/dev.c:3956 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 do_xdp_generic.part.0+0x22/0xc0 net/core/dev.c:4001 do_xdp_generic net/core/dev.c:4039 [inline] netif_rx_internal+0x219/0x800 net/core/dev.c:4039 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batadv_bla_send_claim+0x6dd/0xba0 net/batman-adv/bridge_loop_avoidance.c:456 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batadv_bla_send_announce+0x105/0x140 net/batman-adv/bridge_loop_avoidance.c:687 batadv_bla_get_backbone_gw+0xfd7/0x1310 net/batman-adv/bridge_loop_avoidance.c:556 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready batadv_bla_update_own_backbone_gw net/batman-adv/bridge_loop_avoidance.c:583 [inline] batadv_bla_tx+0x29a/0x2640 net/batman-adv/bridge_loop_avoidance.c:2047 batman_adv: batadv0: Interface activated: batadv_slave_1 batadv_interface_tx+0x3ef/0x11c0 net/batman-adv/soft-interface.c:239 __netdev_start_xmit include/linux/netdevice.h:4051 [inline] netdev_start_xmit include/linux/netdevice.h:4060 [inline] xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0x188/0x890 net/core/dev.c:3021 __dev_queue_xmit+0x1d7f/0x2480 net/core/dev.c:3521 neigh_hh_output include/net/neighbour.h:490 [inline] neigh_output include/net/neighbour.h:498 [inline] ip6_finish_output2+0xc6a/0x1f10 net/ipv6/ip6_output.c:120 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] mld_sendpack+0x5fe/0xea0 net/ipv6/mcast.c:1657 mld_send_cr net/ipv6/mcast.c:1953 [inline] mld_ifc_timer_expire+0x57c/0xcd0 net/ipv6/mcast.c:2452 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x181/0x370 kernel/smp.c:302 RSP: 0018:ffff88804a8577c0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff10 RAX: 0000000000040000 RBX: 1ffff1100950aefc RCX: ffffc90007add000 RDX: 0000000000004c41 RSI: ffffffff814c64cf RDI: 0000000000000282 RBP: ffff88804a857870 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88804a857948 R14: 0000000000000001 R15: 0000000000000000 smp_call_function_many+0x60f/0x7a0 kernel/smp.c:434 smp_call_function kernel/smp.c:492 [inline] on_each_cpu+0x40/0x210 kernel/smp.c:602 flush_tlb_kernel_range+0xaf/0xc0 arch/x86/mm/tlb.c:748 __purge_vmap_area_lazy+0xf6/0x250 mm/vmalloc.c:701 vm_unmap_aliases mm/vmalloc.c:1126 [inline] vm_unmap_aliases+0x390/0x460 mm/vmalloc.c:1089 change_page_attr_set_clr+0x5c3/0xa30 arch/x86/mm/pageattr.c:1472 change_page_attr_clear arch/x86/mm/pageattr.c:1532 [inline] set_memory_ro+0x68/0x80 arch/x86/mm/pageattr.c:1761 bpf_prog_lock_ro include/linux/filter.h:612 [inline] bpf_prog_select_runtime+0x143/0x4e0 kernel/bpf/core.c:1462 bpf_prog_load+0x646/0x1050 kernel/bpf/syscall.c:1062 SYSC_bpf kernel/bpf/syscall.c:1512 [inline] SyS_bpf+0x1163/0x35e0 kernel/bpf/syscall.c:1477 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665d9 RSP: 002b:00007f2f0f187188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000018 RSI: 0000000020000180 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd625ad80f R14: 00007f2f0f187300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..