INFO: task systemd-shutdow:1 blocked for more than 143 seconds.
      Not tainted 5.10.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-shutdow state:D stack:23432 pid:    1 ppid:     0 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3779 [inline]
 __schedule+0x8a2/0x1f30 kernel/sched/core.c:4528
 schedule+0xcb/0x270 kernel/sched/core.c:4606
 wait_for_device_probe+0x1be/0x220 drivers/base/dd.c:702
 device_shutdown+0x18/0x5c0 drivers/base/core.c:4007
 kernel_restart_prepare kernel/reboot.c:76 [inline]
 kernel_restart kernel/reboot.c:246 [inline]
 __do_sys_reboot.cold+0x5d/0x97 kernel/reboot.c:347
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f9d09bd98c6
RSP: 002b:00007ffede69d108 EFLAGS: 00000202 ORIG_RAX: 00000000000000a9
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d09bd98c6
RDX: 0000000001234567 RSI: 0000000028121969 RDI: fffffffffee1dead
RBP: 00007ffede69d198 R08: 0000000000002800 R09: 0000000000000005
R10: 0000000000000002 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000559cbe3aa150 R15: 00007ffede69d488

Showing all locks held in the system:
1 lock held by systemd-shutdow/1:
 #0: ffffffff87128928 (system_transition_mutex){+.+.}-{3:3}, at: __do_sys_reboot+0x1a4/0x3e0 kernel/reboot.c:344
1 lock held by khungtaskd/1262:
 #0: ffffffff872495a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6254
6 locks held by kworker/0:6/7326:
5 locks held by kworker/1:7/7988:

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1262 Comm: khungtaskd Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x46/0xe0 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1da/0x200 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd32/0xf70 kernel/hung_task.c:294
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7326 Comm: kworker/0:6 Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:vsnprintf+0xee/0x14f0 lib/vsprintf.c:2568
Code: f7 d3 48 89 5c 24 28 48 c7 44 24 18 ff ff ff ff e8 97 dc 39 ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 <48> 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 9d 10 00 00 0f b6 5d 00
RSP: 0018:ffffc90005cc6740 EFLAGS: 00000802
RAX: 0000000000000000 RBX: ffffc90005cc6a00 RCX: ffffc9000ffe3000
RDX: 1ffffffff0bcf9bc RSI: ffffffff8204e8c9 RDI: 0000000000000007
RBP: ffffffff85e7cde0 R08: 0000000000000993 R09: ffffc90005cc6997
R10: 000000007fffffff R11: 0000000000000000 R12: ffffc90005cc6a00
R13: ffffffff85e7cde0 R14: 0000000000000000 R15: ffffc90005cc6840
FS:  0000000000000000(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffede69bfd8 CR3: 00000001091a8000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 sprintf+0xc0/0x100 lib/vsprintf.c:2820
 print_time kernel/printk/printk.c:1297 [inline]
 info_print_prefix+0x248/0x340 kernel/printk/printk.c:1323
 record_print_text+0x12a/0x320 kernel/printk/printk.c:1367
 console_unlock+0x318/0xb90 kernel/printk/printk.c:2484
 vprintk_emit+0x1da/0x4d0 kernel/printk/printk.c:2028
 dev_vprintk_emit+0x2ea/0x32e drivers/base/core.c:4128
 dev_printk_emit+0xba/0xf1 drivers/base/core.c:4139
 __netdev_printk+0x1c6/0x27a net/core/dev.c:10942
 netdev_warn+0xd7/0x109 net/core/dev.c:10995
 asix_write_cmd.cold+0x3a/0x46 drivers/net/usb/asix_common.c:52
 asix_set_sw_mii drivers/net/usb/asix_common.c:275 [inline]
 asix_mdio_read+0xef/0x320 drivers/net/usb/asix_common.c:454
 asix_phy_reset+0x104/0x170 drivers/net/usb/asix_devices.c:215
 ax88172_bind+0x412/0x5d0 drivers/net/usb/asix_devices.c:272
 usbnet_probe+0xb54/0x2740 drivers/net/usb/usbnet.c:1712
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 really_probe+0x291/0xde0 drivers/base/dd.c:554
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:844
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4a0 drivers/base/dd.c:912
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbb2/0x1ce0 drivers/base/core.c:2936
 usb_set_configuration+0x113c/0x1910 drivers/usb/core/message.c:2164
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 really_probe+0x291/0xde0 drivers/base/dd.c:554
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:844
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4a0 drivers/base/dd.c:912
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbb2/0x1ce0 drivers/base/core.c:2936
 usb_new_device.cold+0x71d/0xfe9 drivers/usb/core/hub.c:2555
 hub_port_connect drivers/usb/core/hub.c:5223 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
 port_event drivers/usb/core/hub.c:5509 [inline]
 hub_event+0x2348/0x42d0 drivers/usb/core/hub.c:5591
 process_one_work+0x933/0x1520 kernel/workqueue.c:2272
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296