RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 000000000000032a R14: 00000000006f7c90 R15: 0000000000000002
------------[ cut here ]------------
kobject_add_internal failed for tx-1 (error: -12 parent: queues)
WARNING: CPU: 0 PID: 31511 at lib/kobject.c:242 kobject_add_internal+0x3f6/0xbc0 lib/kobject.c:240
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 31511 Comm: syz-executor0 Not tainted 4.16.0+ #380
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+0x1a7/0x27d lib/dump_stack.c:53
 panic+0x1f8/0x42c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x1f4/0x2b0 lib/bug.c:186
 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991
RIP: 0010:kobject_add_internal+0x3f6/0xbc0 lib/kobject.c:240
RSP: 0018:ffff8801b090f458 EFLAGS: 00010282
RAX: dffffc0000000008 RBX: ffff88018d9815d8 RCX: ffffffff815b5d2e
RDX: 0000000000040000 RSI: ffffc90005ac6000 RDI: 1ffff10036121e10
RBP: ffff8801b090f550 R08: ffffed003b604fb1 R09: ffffed003b604fb1
R10: 0000000000000001 R11: ffffed003b604fb0 R12: 1ffff10036121e91
R13: 00000000fffffff4 R14: ffff8801bbb86548 R15: ffffffff87c1a700
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_init_and_add+0xf9/0x150 lib/kobject.c:436
 netdev_queue_add_kobject net/core/net-sysfs.c:1332 [inline]
 netdev_queue_update_kobjects+0x144/0x4b0 net/core/net-sysfs.c:1360
 netif_set_real_num_tx_queues+0x185/0x790 net/core/dev.c:2424
 tun_set_real_num_queues drivers/net/tun.c:638 [inline]
 tun_attach+0x7bd/0x1220 drivers/net/tun.c:864
 tun_set_iff drivers/net/tun.c:2555 [inline]
 __tun_chr_ioctl+0x2139/0x3d90 drivers/net/tun.c:2878
 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3143
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 ksys_ioctl+0x94/0xb0 fs/ioctl.c:701
 SYSC_ioctl fs/ioctl.c:708 [inline]
 SyS_ioctl+0x24/0x30 fs/ioctl.c:706
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4552d9
RSP: 002b:00007f0b52873c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0b528746d4 RCX: 00000000004552d9
RDX: 0000000020001380 RSI: 00000000400454ca RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 000000000000032a R14: 00000000006f7c90 R15: 0000000000000002
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..