INFO: task syz.0.105:4595 blocked for more than 428 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.105       state:D stack:0     pid:4595  tgid:4594  ppid:3210   task_flags:0x40044c flags:0x00000003
Call Trace:
[<ffffffff86486fbc>] context_switch kernel/sched/core.c:5325 [inline]
[<ffffffff86486fbc>] __schedule+0x1042/0x4114 kernel/sched/core.c:6929
[<ffffffff8648a152>] __schedule_loop kernel/sched/core.c:7011 [inline]
[<ffffffff8648a152>] schedule+0xc4/0x35e kernel/sched/core.c:7026
[<ffffffff8648aad4>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:7083
[<ffffffff86495dd4>] rwsem_down_read_slowpath+0x58c/0x9f4 kernel/locking/rwsem.c:1086
[<ffffffff86496320>] __down_read_common kernel/locking/rwsem.c:1261 [inline]
[<ffffffff86496320>] __down_read kernel/locking/rwsem.c:1274 [inline]
[<ffffffff86496320>] down_read+0xe4/0x460 kernel/locking/rwsem.c:1539
[<ffffffff8015dc36>] mmap_read_lock include/linux/mmap_lock.h:368 [inline]
[<ffffffff8015dc36>] exit_mm kernel/exit.c:558 [inline]
[<ffffffff8015dc36>] do_exit+0x6c2/0x28e4 kernel/exit.c:954
[<ffffffff801603b8>] do_group_exit+0xd4/0x26c kernel/exit.c:1107
[<ffffffff801997b8>] get_signal+0x2076/0x22f8 kernel/signal.c:3034
[<ffffffff8007105a>] arch_do_signal_or_restart+0x68a/0x254e arch/riscv/kernel/signal.c:431
[<ffffffff803c1734>] exit_to_user_mode_loop+0x8a/0x142 kernel/entry/common.c:40
[<ffffffff8647c6a8>] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
[<ffffffff8647c6a8>] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
[<ffffffff8647c6a8>] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
[<ffffffff8647c6a8>] do_trap_ecall_u+0x3f8/0x53a arch/riscv/kernel/traps.c:357
[<ffffffff864a5f52>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:198

Showing all locks held in the system:
1 lock held by kthreadd/2:
2 locks held by kworker/u10:0/28:
1 lock held by khungtaskd/38: