INFO: task syz-executor.1:6256 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc4-syzkaller-g6a71d2909427 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:0     pid:6256  tgid:6256  ppid:1      flags:0x0000000d
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x14bc/0x24ec kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6838
 io_schedule+0x8c/0x12c kernel/sched/core.c:9044
 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1283
 folio_wait_bit+0x30/0x40 mm/filemap.c:1422
 folio_wait_writeback+0x9c/0x100 mm/page-writeback.c:3115
 __filemap_fdatawait_range+0x16c/0x304 mm/filemap.c:532
 filemap_fdatawait_keep_errors+0x34/0xb0 mm/filemap.c:627
 wait_sb_inodes fs/fs-writeback.c:2664 [inline]
 sync_inodes_sb+0x70c/0x944 fs/fs-writeback.c:2786
 sync_filesystem+0x160/0x218 fs/sync.c:64
 generic_shutdown_super+0x70/0x2b8 fs/super.c:620
 kill_block_super+0x44/0x90 fs/super.c:1675
 deactivate_locked_super+0xc4/0x12c fs/super.c:472
 deactivate_super+0xe0/0x100 fs/super.c:505
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1267
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1274
 task_work_run+0x230/0x2e0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffff80008f0578c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:328
1 lock held by klogd/5849:
2 locks held by getty/6004:
 #0: ffff0000d32390a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800097bab2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.1/6256:
 #0: ffff0000d70ba0e0 (&type->s_umount_key#67){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff0000d70ba0e0 (&type->s_umount_key#67){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff0000d70ba0e0 (&type->s_umount_key#67){+.+.}-{3:3}, at: deactivate_super+0xd8/0x100 fs/super.c:504
 #1: ffff0000d70ba940 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2603 [inline]
 #1: ffff0000d70ba940 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x2a8/0x944 fs/fs-writeback.c:2786

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