INFO: task kworker/u4:15:4869 blocked for more than 148 seconds.
      Not tainted 6.1.119-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:15   state:D stack:0     pid:4869  ppid:2      flags:0x00000008
Workqueue: writeback wb_workfn (flush-7:6)
Call trace:
 __switch_to+0x308/0x5fc arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0xef4/0x1d44 kernel/sched/core.c:6558
 schedule+0xc4/0x170 kernel/sched/core.c:6634
 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+0x42c/0x4a0 fs/f2fs/inode.c:731
 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+0x7ac/0x1404 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:
2 locks held by kworker/u4:0/9:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff800015c55470 (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: ffff800015c55c70 (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: ffff800015c552a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
2 locks held by khugepaged/33:
 #0: ffff800015ceb568 (lock#2){+.+.}-{3:3}, at: __lru_add_drain_all+0x90/0x78c mm/swap.c:873
 #1: ffff0001b3cf5158 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:537 [inline]
 #1: ffff0001b3cf5158 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
 #1: ffff0001b3cf5158 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1645 [inline]
 #1: ffff0001b3cf5158 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2c4/0x1d44 kernel/sched/core.c:6474
2 locks held by getty/4051:
 #0: ffff0000d61f5098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80002116b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2198
4 locks held by kworker/u4:15/4869:
 #0: ffff0000c2e4d938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265
 #1: ffff800022007c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267
 #2: ffff0000cdbf20e0 (&type->s_umount_key#99){++++}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:415
 #3: ffff0000d9d551e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2178 [inline]
 #3: ffff0000d9d551e8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x418/0x618 fs/f2fs/segment.c:428
5 locks held by syz.6.810/7365:
4 locks held by udevd/8886:
1 lock held by syz.4.1406/9835:
1 lock held by syz.3.1413/9848:
 #0: ffff0000d57c5b48 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #0: ffff0000d57c5b48 (&mm->mmap_lock){++++}-{3:3}, at: do_mprotect_pkey mm/mprotect.c:702 [inline]
 #0: ffff0000d57c5b48 (&mm->mmap_lock){++++}-{3:3}, at: __do_sys_mprotect mm/mprotect.c:819 [inline]
 #0: ffff0000d57c5b48 (&mm->mmap_lock){++++}-{3:3}, at: __se_sys_mprotect mm/mprotect.c:816 [inline]
 #0: ffff0000d57c5b48 (&mm->mmap_lock){++++}-{3:3}, at: __arm64_sys_mprotect+0x378/0xc24 mm/mprotect.c:816
1 lock held by syz.3.1413/9849:

=============================================