INFO: task syz-executor:5913 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22504 pid:5913  tgid:5913  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 del_device_store+0xd1/0x360
 kernfs_fop_write_iter+0x378/0x4f0
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7febf318d6df
RSP: 002b:00007fff02fb3380 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007febf318d6df
RDX: 0000000000000001 RSI: 00007fff02fb33d0 RDI: 0000000000000005
RBP: 00007febf32130e9 R08: 0000000000000000 R09: 00007fff02fb31d7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007fff02fb33d0 R14: 00007febf3f04620 R15: 0000000000000003
 </TASK>

Showing all locks held in the system:
2 locks held by init/1:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
