bond2 (unregistering): Releasing backup interface bridge1 team0 (unregistering): Port device bond2 removed bond2 (unregistering): Released all slaves bond1 (unregistering): Released all slaves ------------[ cut here ]------------ WARNING: CPU: 1 PID: 9485 at net/core/dev.c:8208 rollback_registered_many.cold+0x171/0x18f net/core/dev.c:8208 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9485 Comm: kworker/u4:6 Not tainted 4.19.167-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:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x61 kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:186 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 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:rollback_registered_many.cold+0x171/0x18f net/core/dev.c:8208 Code: ff e8 a1 77 cf fa 48 c7 c7 80 09 4c 89 e8 84 71 ba fa 0f 0b e9 47 c1 ff ff e8 89 77 cf fa 48 c7 c7 80 09 4c 89 e8 6c 71 ba fa <0f> 0b e9 9d bf ff ff 48 89 c7 48 89 44 24 08 e8 f9 a2 05 fb 48 8b RSP: 0018:ffff888053fcf988 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff88804c7e9ac0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814fde01 RDI: ffffed100a7f9f23 RBP: ffff888053fcfb60 R08: 0000000000000024 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000042bf6e01 R14: ffffffff844d5da0 R15: ffff888053fcfa50 unregister_netdevice_many.part.0+0x1a/0x300 net/core/dev.c:9311 unregister_netdevice_many net/core/dev.c:9310 [inline] default_device_exit_batch+0x2fa/0x3c0 net/core/dev.c:9782 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553 process_one_work+0x864/0x1570 kernel/workqueue.c:2155 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Kernel Offset: disabled Rebooting in 86400 seconds..