Bluetooth: hci4: command 0x0419 tx timeout
Bluetooth: hci2: command 0x0409 tx timeout
Bluetooth: hci2: command 0x041b tx timeout
bond2 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 0 PID: 15262 at net/core/dev.c:8216 rollback_registered_many.cold+0x171/0x18f net/core/dev.c:8216
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 15262 Comm: kworker/u4:10 Not tainted 4.19.211-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/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 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:8216
Code: fe e8 95 d6 50 f9 48 c7 c7 c0 85 4c 89 e8 f4 07 e2 ff 0f 0b e9 2b fb 65 fe e8 7d d6 50 f9 48 c7 c7 c0 85 4c 89 e8 dc 07 e2 ff <0f> 0b e9 81 f9 65 fe 48 89 c7 48 89 44 24 08 e8 1d b6 86 f9 48 8b
RSP: 0018:ffff88803fbb7988 EFLAGS: 00010282
RAX: 0000000000000024 RBX: ffff888048529000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1007f76f23
RBP: ffff88803fbb7b60 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: 00000000b5b20d01 R14: ffffffff843ffad0 R15: ffff88803fbb7a50
 unregister_netdevice_many.part.0+0x1a/0x300 net/core/dev.c:9324
 unregister_netdevice_many net/core/dev.c:9323 [inline]
 default_device_exit_batch+0x2fa/0x3c0 net/core/dev.c:9795
 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156
 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 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..