INFO: task syz.4.1662:13255 blocked for more than 146 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1662      state:D stack:28744 pid:13255 tgid:13250 ppid:5817   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x818/0x1060 kernel/locking/mutex.c:760
 commit_echoes+0x4c/0x210 drivers/tty/n_tty.c:740
 n_tty_receive_char+0x3d7/0x600 drivers/tty/n_tty.c:1421
 n_tty_receive_buf_standard+0x6aa/0x3140 drivers/tty/n_tty.c:1590
 __receive_buf drivers/tty/n_tty.c:1624 [inline]
 n_tty_receive_buf_common+0x8eb/0x1980 drivers/tty/n_tty.c:1723