device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode bond3 (unregistering): Released all slaves ------------[ cut here ]------------ WARNING: CPU: 0 PID: 250 at net/core/dev.c:7223 rollback_registered_many+0x959/0xba0 net/core/dev.c:7223 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 250 Comm: kworker/u4:3 Not tainted 4.14.212-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x20/0x4b kernel/panic.c:547 report_bug+0x208/0x249 lib/bug.c:186 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 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 RIP: 0010:rollback_registered_many+0x959/0xba0 net/core/dev.c:7223 RSP: 0018:ffff8880b4dffaa8 EFLAGS: 00010297 RAX: ffff8880b4df4000 RBX: ffff888067959c00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880b4df4900 RDI: 0000000000000000 RBP: ffff8880b4dffbc8 R08: ffffffff89d15e00 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880b4dffae0 R14: ffff888067959cb0 R15: ffffffff83d7e670 unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8285 unregister_netdevice_many net/core/dev.c:8284 [inline] default_device_exit_batch+0x2d8/0x380 net/core/dev.c:8746 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:145 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Kernel Offset: disabled Rebooting in 86400 seconds..