------------[ cut here ]------------
RTNL: assertion failed at ./include/net/netdev_lock.h (72)
WARNING: CPU: 0 PID: 9187 at ./include/net/netdev_lock.h:72 netdev_ops_assert_locked include/net/netdev_lock.h:72 [inline]
WARNING: CPU: 0 PID: 9187 at ./include/net/netdev_lock.h:72 __linkwatch_sync_dev+0x1ed/0x230 net/core/link_watch.c:279
Modules linked in:
CPU: 0 UID: 0 PID: 9187 Comm: kworker/u32:65 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 94 fe 43 f8 c6 05 ca 10 1c 07 01 90 ba 48 00 00 00 48 c7 c6 60 e7 e5 8c 48 c7 c7 00 e7 e5 8c e8 04 9f 02 f8 90 <0f> 0b 90 90 e9 d6 fe ff ff 48 c7 c7 64 71 ab 90 e8 fe 54 aa f8 e9
RSP: 0018:ffffc90006e8f9f0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88805fb98000 RCX: ffffffff817a3358
RDX: ffff88805d128000 RSI: ffffffff817a3365 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 000000002d2d2d2d R12: 1ffff92000dd1f48
R13: ffff88805fb98cc1 R14: ffffffff8c56f5e0 R15: ffffffff89b0b200
FS:  0000000000000000(0000) GS:ffff8880d66bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff943d3de8 CR3: 000000004b8c7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ethtool_op_get_link+0x1d/0x70 net/ethtool/ioctl.c:63
 bond_check_dev_link+0x3f9/0x710 drivers/net/bonding/bond_main.c:865
 bond_miimon_inspect drivers/net/bonding/bond_main.c:2762 [inline]
 bond_mii_monitor+0x3c0/0x2dc0 drivers/net/bonding/bond_main.c:2984
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>