IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready ------------[ cut here ]------------ IPv6: ADDRCONF(NETDEV_UP): veth1_vlan: link is not ready ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4943 WARNING: CPU: 0 PID: 59 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 lib/debugobjects.c:325 device veth0_vlan entered promiscuous mode Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 59 Comm: kworker/u4:2 Not tainted 4.19.113-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net device veth1_vlan entered promiscuous mode Call Trace: IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready device veth0_macvtap entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready __warn.cold+0x20/0x46 kernel/panic.c:541 device veth1_macvtap entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready report_bug+0x262/0x2a0 lib/bug.c:186 IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 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:3d) already exists on: batadv_slave_0 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:3d) already exists on: batadv_slave_0 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037 RIP: 0010:debug_print_object+0x160/0x250 lib/debugobjects.c:325 Code: dd 60 0b ab 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 0b ab 87 48 c7 c7 a0 00 ab 87 e8 0b 65 e6 fd <0f> 0b 83 05 13 11 37 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 RSP: 0018:ffff8880a96478e8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8152d3a1 RDI: ffffed10152c8f0f RBP: 0000000000000001 R08: ffff8880a963a0c0 R09: ffffed1015cc3ee3 R10: ffffed1015cc3ee2 R11: ffff8880ae61f717 R12: ffffffff88b9faa0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! R13: ffffffff81581ee0 R14: ffffffff8b89b488 R15: ffff8880517f70a0 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 __debug_check_no_obj_freed lib/debugobjects.c:785 [inline] debug_check_no_obj_freed+0x2a3/0x42e lib/debugobjects.c:817 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! kfree+0xbb/0x220 mm/slab.c:3821 kvfree+0x59/0x60 mm/util.c:452 device_release+0x76/0x210 drivers/base/core.c:1061 IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready kobject_cleanup lib/kobject.c:662 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put+0x17c/0x270 lib/kobject.c:708 batman_adv: batadv0: Interface activated: batadv_slave_0 netdev_run_todo+0x4f1/0x740 net/core/dev.c:8981 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! default_device_exit_batch+0x309/0x3c0 net/core/dev.c:9766 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! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 ops_exit_list.isra.0+0xef/0x140 net/core/net_namespace.c:156 cleanup_net+0x3bf/0x850 net/core/net_namespace.c:553 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! process_one_work+0x91f/0x1640 kernel/workqueue.c:2155 worker_thread+0x96/0xe20 kernel/workqueue.c:2298 kthread+0x34a/0x420 kernel/kthread.c:246 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! ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ======================================================