INFO: task kworker/u4:3:134 blocked for more than 144 seconds.
      Not tainted 6.1.131-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3    state:D stack:0     pid:134   ppid:2      flags:0x00000008
Workqueue: writeback wb_workfn (flush-7:3)
Call trace:
 __switch_to+0x308/0x598 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5243 [inline]
 __schedule+0xef4/0x1d44 kernel/sched/core.c:6560
 schedule+0xc4/0x170 kernel/sched/core.c:6636
 rwsem_down_write_slowpath+0xc80/0x156c kernel/locking/rwsem.c:1189
 __down_write_common kernel/locking/rwsem.c:1314 [inline]
 __down_write kernel/locking/rwsem.c:1323 [inline]
 down_write+0x84/0x88 kernel/locking/rwsem.c:1574
 f2fs_down_write fs/f2fs/f2fs.h:2178 [inline]
 f2fs_balance_fs+0x418/0x618 fs/f2fs/segment.c:428
 f2fs_write_inode+0x430/0x598 fs/f2fs/inode.c:733
 write_inode fs/fs-writeback.c:1460 [inline]
 __writeback_single_inode+0x614/0x1770 fs/fs-writeback.c:1677
 writeback_sb_inodes+0x978/0x1718 fs/fs-writeback.c:1903
 __writeback_inodes_wb+0x110/0x39c fs/fs-writeback.c:1974
 wb_writeback+0x428/0x1130 fs/fs-writeback.c:2079
 wb_check_background_flush fs/fs-writeback.c:2145 [inline]
 wb_do_writeback fs/fs-writeback.c:2233 [inline]
 wb_workfn+0xc98/0x1034 fs/fs-writeback.c:2260
 process_one_work+0x804/0x1484 kernel/workqueue.c:2292
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff800015cd79b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
 #0: ffff800015cd81b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
 #0: ffff800015cd77e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
4 locks held by kworker/u4:3/134:
 #0: ffff0000c2e45938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1484 kernel/workqueue.c:2265
 #1: ffff80001d8e7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x1484 kernel/workqueue.c:2267
 #2: ffff0000d40ea0e0 (&type->s_umount_key#61){++++}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:415
 #3: ffff0000dcccd1e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2178 [inline]
 #3: ffff0000dcccd1e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x418/0x618 fs/f2fs/segment.c:428
2 locks held by kworker/u4:4/1330:
2 locks held by getty/4052:
 #0: ffff0000d6763098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80001d9002f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2198
2 locks held by kworker/0:14/4483:
 #0: ffff0000c0021938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1484 kernel/workqueue.c:2265
 #1: ffff8000215a7c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x1484 kernel/workqueue.c:2267
6 locks held by syz.3.200/5110:
1 lock held by syz.5.732/7167:
 #0: ffff0000dfb81a10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #0: ffff0000dfb81a10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:653 [inline]
 #0: ffff0000dfb81a10 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x80/0x1fc net/socket.c:1400
2 locks held by syz.4.736/7176:
 #0: ffff0000d53100e0 (&type->s_umount_key#50/1){+.+.}-{3:3}, at: alloc_super+0x1b4/0x824 fs/super.c:228
 #1: ffff800015cdcdf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
 #1: ffff800015cdcdf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e0/0x77c kernel/rcu/tree_exp.h:962

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