INFO: task syz-executor362:4036 blocked for more than 143 seconds.
      Not tainted 5.15.178-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor362 state:D
 stack:    0 pid: 4036 ppid:  4035 flags:0x0000000c
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 wb_wait_for_completion+0x160/0x2b4 fs/fs-writeback.c:191
 sync_inodes_sb+0x220/0x944 fs/fs-writeback.c:2770
 sync_filesystem+0x160/0x218 fs/sync.c:64
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task syz-executor362:4037 blocked for more than 143 seconds.
      Not tainted 5.15.178-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor362 state:D stack:    0 pid: 4037 ppid:  4035 flags:0x0000000c
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 wb_wait_for_completion+0x160/0x2b4 fs/fs-writeback.c:191
 sync_inodes_sb+0x220/0x944 fs/fs-writeback.c:2770
 sync_filesystem+0x160/0x218 fs/sync.c:64
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task syz-executor362:4038 blocked for more than 143 seconds.
      Not tainted 5.15.178-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor362 state:D stack:    0 pid: 4038 ppid:  4035 flags:0x0000000c
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 wb_wait_for_completion+0x160/0x2b4 fs/fs-writeback.c:191
 sync_inodes_sb+0x220/0x944 fs/fs-writeback.c:2770
 sync_filesystem+0x160/0x218 fs/sync.c:64
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task syz-executor362:4039 blocked for more than 143 seconds.
      Not tainted 5.15.178-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor362 state:D
 stack:    0 pid: 4039 ppid:  4035 flags:0x0000000c
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 wb_wait_for_completion+0x160/0x2b4 fs/fs-writeback.c:191
 sync_inodes_sb+0x220/0x944 fs/fs-writeback.c:2770
 sync_filesystem+0x160/0x218 fs/sync.c:64
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task syz-executor362:4040 blocked for more than 144 seconds.
      Not tainted 5.15.178-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor362 state:D
 stack:    0 pid: 4040 ppid:  4035 flags:0x0000000c
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 wb_wait_for_completion+0x160/0x2b4 fs/fs-writeback.c:191
 sync_inodes_sb+0x220/0x944 fs/fs-writeback.c:2770
 sync_filesystem+0x160/0x218 fs/sync.c:64
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: 
ffff800014d42360
 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
4 locks held by kworker/u4:1/136:
 #0: 
ffff0000c21d8138
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: 
ffff80001d717c00
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: 
ffff0000ce200650
 (
sb_internal
#2
){.+.+}-{0:0}
, at: xfs_bmapi_convert_delalloc+0x1e0/0x1018 fs/xfs/libxfs/xfs_bmap.c:4573
 #3: 
ffff0000de372668
 (
&xfs_nondir_ilock_class
){++++}-{3:3}
, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline]
, at: xfs_ilock+0x26c/0x4c4 fs/xfs/xfs_inode.c:200
4 locks held by kworker/u4:2/148:
 #0: 
ffff0000c21d8138
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: 
ffff80001d7b7c00
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: 
ffff0000da7a4650
 (
sb_internal
#2
){.+.+}-{0:0}
, at: xfs_bmapi_convert_delalloc+0x1e0/0x1018 fs/xfs/libxfs/xfs_bmap.c:4573
 #3: 
ffff0000de36c468
 (
&xfs_nondir_ilock_class
){++++}-{3:3}
, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline]
, at: xfs_ilock+0x26c/0x4c4 fs/xfs/xfs_inode.c:200
4 locks held by kworker/u4:3/293:
 #0: 
ffff0000c21d8138
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: 
ffff80001fc47c00
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: 
ffff0000cd8b0650
 (
sb_internal
#2
){.+.+}-{0:0}
, at: xfs_bmapi_convert_delalloc+0x1e0/0x1018 fs/xfs/libxfs/xfs_bmap.c:4573
 #3: 
ffff0000de3900e8
 (
&xfs_nondir_ilock_class
){++++}-{3:3}
, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline]
, at: xfs_ilock+0x26c/0x4c4 fs/xfs/xfs_inode.c:200
4 locks held by kworker/u4:4/400:
 #0: 
ffff0000c21d8138
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: 
ffff8000202e7c00
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: 
ffff0000dad10650
 (
sb_internal
#2
){.+.+}-{0:0}
, at: xfs_bmapi_convert_delalloc+0x1e0/0x1018 fs/xfs/libxfs/xfs_bmap.c:4573
 #3: 
ffff0000de369ee8
 (
&xfs_nondir_ilock_class
){++++}-{3:3}
, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline]
, at: xfs_ilock+0x26c/0x4c4 fs/xfs/xfs_inode.c:200
4 locks held by kworker/u4:5/566:
 #0: 
ffff0000c21d8138
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: 
ffff800020017c00
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: 
ffff0000daefa650
 (sb_internal#2){.+.+}-{0:0}, at: xfs_bmapi_convert_delalloc+0x1e0/0x1018 fs/xfs/libxfs/xfs_bmap.c:4573
 #3: 
ffff0000de372de8
 (
&xfs_nondir_ilock_class){++++}-{3:3}
, at: mrupdate_nested fs/xfs/mrlock.h:36 [inline]
, at: xfs_ilock+0x26c/0x4c4 fs/xfs/xfs_inode.c:200
2 locks held by kworker/0:2/1535:
4 locks held by kworker/1:3/1982:
2 locks held by getty/3788:
 #0: 
ffff0000d48e8098
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: 
ffff80001d5fe2e8
 (
&ldata->atomic_read_lock){+.+.}-{3:3}
, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158
2 locks held by syz-executor362/4036:
 #0: ffff0000cd8b00e0
 (&type->s_umount_key
#41
){+.+.}-{3:3}
, at: deactivate_super+0x100/0x128 fs/super.c:365
 #1: 
ffff0000cbfda7d8
 (
&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768
2 locks held by syz-executor362/4037:
 #0: 
ffff0000ce2000e0
 (
&type->s_umount_key
#41
){+.+.}-{3:3}
, at: deactivate_super+0x100/0x128 fs/super.c:365
 #1: ffff0000cc0187d8 (&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768
2 locks held by syz-executor362/4038:
 #0: 
ffff0000da7a40e0
 (
&type->s_umount_key
#41
){+.+.}-{3:3}
, at: deactivate_super+0x100/0x128 fs/super.c:365
 #1: 
ffff0000cc01e7d8
 (
&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768
2 locks held by syz-executor362/4039:
 #0: 
ffff0000dad100e0
 (
&type->s_umount_key
#41
){+.+.}-{3:3}
, at: deactivate_super+0x100/0x128 fs/super.c:365
 #1: 
ffff0000cc03c7d8
 (
&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768
2 locks held by syz-executor362/4040:
 #0: 
ffff0000daefa0e0
 (
&type->s_umount_key
#41
){+.+.}-{3:3}
, at: deactivate_super+0x100/0x128 fs/super.c:365
 #1: 
ffff0000cc0627d8
 (
&bdi->wb_switch_rwsem
){+.+.}-{3:3}
, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2768

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