------------[ cut here ]------------
RTNL: assertion failed at ./include/net/netdev_lock.h (72)
WARNING: CPU: 1 PID: 46 at ./include/net/netdev_lock.h:72 netdev_ops_assert_locked include/net/netdev_lock.h:72 [inline]
WARNING: CPU: 1 PID: 46 at ./include/net/netdev_lock.h:72 __linkwatch_sync_dev+0x1ed/0x230 net/core/link_watch.c:279
Modules linked in:
CPU: 1 UID: 0 PID: 46 Comm: kworker/u32:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: bond0 bond_mii_monitor
RIP: 0010:netdev_ops_assert_locked include/net/netdev_lock.h:72 [inline]
RIP: 0010:__linkwatch_sync_dev+0x1ed/0x230 net/core/link_watch.c:279
Code: 05 ff ff ff e8 54 08 86 f8 c6 05 45 0f 14 07 01 90 ba 48 00 00 00 48 c7 c6 40 c8 9f 8c 48 c7 c7 e0 c7 9f 8c e8 54 93 44 f8 90 <0f> 0b 90 90 e9 d6 fe ff ff 48 c7 c7 54 e1 60 90 e8 de 80 ed f8 e9
RSP: 0018:ffffc900007ef9f0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888057ff8000 RCX: ffffffff8179b5b8
RDX: ffff88801eeb8000 RSI: ffffffff8179b5c5 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920000fdf48
R13: ffff888057ff8cc1 R14: ffffffff8c146920 R15: ffffffff896e72f0
FS:  0000000000000000(0000) GS:ffff8880d6f55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f371ef67000 CR3: 000000000df82000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x3fc/0x710 drivers/net/bonding/bond_main.c:865
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2763 [inline]
 bond_mii_monitor+0x3c0/0x2dc0 drivers/net/bonding/bond_main.c:2985
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>