INFO: task kworker/u4:4:225 blocked for more than 143 seconds.
      Not tainted 6.1.105-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4    state:D stack:0     pid:225   ppid:2      flags:0x00000008
Workqueue: writeback wb_workfn (flush-7:0)
Call trace:
 __switch_to+0x320/0x754 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
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6693
 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 jfs_commit_inode+0x1d4/0x4f8 fs/jfs/inode.c:102
 jfs_write_inode+0x128/0x200 fs/jfs/inode.c:132
 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:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff800015ba50b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
 #0: ffff800015ba58b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
 #0: ffff800015ba4ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
4 locks held by kworker/u4:4/225:
 #0: ffff0000c2e55938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265
 #1: ffff80001e2b7c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267
 #2: ffff0000d21380e0 (&type->s_umount_key#75){++++}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:415
 #3: ffff0000f27d3008 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x1d4/0x4f8 fs/jfs/inode.c:102
1 lock held by udevd/3912:
2 locks held by getty/4055:
 #0: ffff0000d62e2098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80001bea02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2198
2 locks held by kworker/u4:11/4445:
2 locks held by kworker/u4:13/4506:
3 locks held by kworker/0:10/5446:
 #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265
 #1: ffff80001ef27c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267
 #2: ffff0000c4517240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489
2 locks held by syz-executor/5597:
8 locks held by syz.0.406/5834:
1 lock held by syz-executor/5907:
2 locks held by syz.1.1207/8186:
 #0: ffff0000d21380e0 (&type->s_umount_key#75){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:755
 #1: ffff0000ce3167d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
 #1: ffff0000ce3167d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2737
1 lock held by modprobe/8489:

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