RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 000000000000032a R14: 00000000006f6c90 R15: 0000000000000003
------------[ cut here ]------------
kobject_add_internal failed for tx-1 (error: -12 parent: queues)
WARNING: CPU: 0 PID: 22971 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: 22971 Comm: syz-executor2 Not tainted 4.16.0-rc7+ #374
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+0x194/0x24d lib/dump_stack.c:53
 panic+0x1e4/0x41c 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:986
RIP: 0010:kobject_add_internal+0x3f6/0xbc0 lib/kobject.c:240
RSP: 0018:ffff8801abbcf488 EFLAGS: 00010286
RAX: dffffc0000000008 RBX: ffff88018e001218 RCX: ffffffff815b193e
RDX: 0000000000040000 RSI: ffffc900092da000 RDI: 1ffff10035779e16
RBP: ffff8801abbcf580 R08: 1ffff10035779dd8 R09: 0000000000000000
R10: ffff8801abbcf248 R11: 0000000000000000 R12: 1ffff10035779e97
R13: 00000000fffffff4 R14: ffff8801c4ab2b48 R15: ffffffff87c16460
 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+0x148/0x480 net/core/net-sysfs.c:1360
 netif_set_real_num_tx_queues+0x185/0x790 net/core/dev.c:2397
 tun_set_real_num_queues drivers/net/tun.c:637 [inline]
 tun_attach+0x7bd/0x1220 drivers/net/tun.c:863
 tun_set_iff drivers/net/tun.c:2501 [inline]
 __tun_chr_ioctl+0x239c/0x4100 drivers/net/tun.c:2821
 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3078
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455269
RSP: 002b:00007fc60cf99c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc60cf9a6d4 RCX: 0000000000455269
RDX: 0000000020000180 RSI: 00000000400454ca RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015
R13: 000000000000032a R14: 00000000006f6c90 R15: 0000000000000003
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..