rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10816/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=47257, q=791512 ncpus=2)
task:syz.5.1164      state:R  running task     stack:24008 pid:10816 tgid:10815 ppid:10711  task_flags:0x2040054c flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irqrestore+0xfd/0x110
 debug_object_assert_init+0x20e/0x380
 __mod_timer+0x4a/0xf30
 blk_mq_start_request+0x356/0x8a0
 loop_queue_rq+0x77/0xb00
 blk_mq_request_issue_directly+0x3c1/0x710
 blk_mq_issue_direct+0x2a0/0x660
 blk_mq_dispatch_queue_requests+0x6fe/0x800
 blk_mq_flush_plug_list+0x432/0x550
 __blk_flush_plug+0x3d3/0x4b0
 blk_finish_plug+0x5e/0x90
 f2fs_sync_meta_pages+0x8e2/0x9b0
 do_checkpoint+0x2240/0x3e40
 f2fs_write_checkpoint+0x15bb/0x1df0
 f2fs_issue_checkpoint+0x3ac/0x570
 sync_filesystem+0x1cf/0x230
 generic_shutdown_super+0x6f/0x2c0
 kill_block_super+0x44/0x90
 kill_f2fs_super+0x390/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa270d8eba9
RSP: 002b:00007fa271c840e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007fa270fd5fa8 RCX: 00007fa270d8eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa270fd5fa8
RBP: 00007fa270fd5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa270fd6038 R14: 00007fffb097d760 R15: 00007fffb097d848
 </TASK>
