INFO: task syz.4.1042:9231 blocked for more than 426 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1042      state:D stack:0     pid:9231  tgid:9229  ppid:8070   task_flags:0x40044c flags:0x00000002
Call Trace:
[<ffffffff8643b712>] context_switch kernel/sched/core.c:5298 [inline]
[<ffffffff8643b712>] __schedule+0x18fa/0x4578 kernel/sched/core.c:6911
[<ffffffff8643e444>] __schedule_loop kernel/sched/core.c:6993 [inline]
[<ffffffff8643e444>] schedule+0xb4/0x334 kernel/sched/core.c:7008
[<ffffffff8643e7c6>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:7065
[<ffffffff86449ac2>] rwsem_down_read_slowpath+0x4ca/0x954 kernel/locking/rwsem.c:1086
[<ffffffff8644a02c>] __down_read_common kernel/locking/rwsem.c:1261 [inline]
[<ffffffff8644a02c>] __down_read kernel/locking/rwsem.c:1274 [inline]
[<ffffffff8644a02c>] down_read+0xe0/0x454 kernel/locking/rwsem.c:1539
[<ffffffff80160262>] mmap_read_lock include/linux/mmap_lock.h:592 [inline]
[<ffffffff80160262>] exit_mm kernel/exit.c:557 [inline]
[<ffffffff80160262>] do_exit+0x70e/0x2ac4 kernel/exit.c:964
[<ffffffff80162b42>] do_group_exit+0xca/0x258 kernel/exit.c:1118
[<ffffffff8019c472>] get_signal+0x1f7e/0x224c kernel/signal.c:3034
[<ffffffff800724dc>] arch_do_signal_or_restart+0xca0/0x1ddc arch/riscv/kernel/signal.c:534
[<ffffffff803d0a7e>] __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
[<ffffffff803d0a7e>] exit_to_user_mode_loop+0x8e/0x878 kernel/entry/common.c:98
[<ffffffff8642fe9c>] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
[<ffffffff8642fe9c>] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
[<ffffffff8642fe9c>] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
[<ffffffff8642fe9c>] do_trap_ecall_u+0x4e0/0x680 arch/riscv/kernel/traps.c:357
[<ffffffff8645a152>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232

Showing all locks held in the system:
1 lock held by kthreadd/2:
4 locks held by kworker/u8:2/30:
 #0: ffffaf8031d62948 ((wq_completion)wg-kex-wg2#3){+.+.}-{0:0}, at: process_one_work+0x860/0x2124 kernel/workqueue.c:3251