INFO: task syz.6.261:8338 blocked for more than 144 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.261       state:D
 stack:0     pid:8338  tgid:8338  ppid:7788   task_flags:0x40044c flags:0x00800011
Call trace:
 __switch_to+0x418/0x87c arch/arm64/kernel/process.c:742 (T)
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1250/0x2a7c kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xb4/0x230 kernel/sched/core.c:6960
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017
 rwsem_down_read_slowpath+0x578/0x86c kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0x9c/0x308 kernel/locking/rwsem.c:1539
 mmap_read_lock include/linux/mmap_lock.h:391 [inline]
 exit_mm+0x64/0x200 kernel/exit.c:557
 do_exit+0x4c4/0x1a1c kernel/exit.c:959
 do_group_exit+0x194/0x22c kernel/exit.c:1112