INFO: task syz.4.22544:6886 blocked for more than 145 seconds.
      Tainted: G             L      syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.22544     state:D stack:26912 pid:6886  tgid:6886  ppid:5838   task_flags:0x40044c flags:0x08080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0x15dd/0x52d0 kernel/sched/core.c:6908
 __schedule_loop kernel/sched/core.c:6990 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7005
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7062
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776
 exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
 synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961