INFO: task syz-executor:6560 blocked for more than 150 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22120 pid:6560  tgid:6560  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17ba/0x5670
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 device_del+0xa9/0x8f0
 device_unregister+0x21/0xf0
 del_device_store+0x2b0/0x370
 kernfs_fop_write_iter+0x3af/0x540
