INFO: task syz-executor.5:28250 blocked for more than 143 seconds.
      Not tainted 5.15.106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:    0 pid:28250 ppid:  4111 flags:0x00000009
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0xf10/0x1e38 kernel/sched/core.c:6372
 schedule+0x11c/0x1c8 kernel/sched/core.c:6455
 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1860
 do_wait_for_common+0x214/0x388 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x4c/0x64 kernel/sched/completion.c:138
 xfs_buf_iowait+0x16c/0x704 fs/xfs/xfs_buf.c:1573
 xfs_buf_delwri_pushbuf+0x330/0x5e4 fs/xfs/xfs_buf.c:2251
 xfs_qm_flush_one+0x1fc/0x2cc fs/xfs/xfs_qm.c:1249
 xfs_qm_dquot_walk+0x1f0/0x424 fs/xfs/xfs_qm.c:86
 xfs_qm_quotacheck+0x2d0/0x56c fs/xfs/xfs_qm.c:1339
 xfs_qm_mount_quotas+0x2ac/0x578 fs/xfs/xfs_qm.c:1441
 xfs_mountfs+0x11e4/0x1778 fs/xfs/xfs_mount.c:904
 xfs_fs_fill_super+0xd64/0xf60 fs/xfs/xfs_super.c:1658
 get_tree_bdev+0x360/0x54c fs/super.c:1303
 xfs_fs_get_tree+0x28/0x38 fs/xfs/xfs_super.c:1705
 vfs_get_tree+0x90/0x274 fs/super.c:1508
 do_new_mount+0x25c/0x8c8 fs/namespace.c:2994
 path_mount+0x590/0x104c fs/namespace.c:3324
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount fs/namespace.c:3522 [inline]
 __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
 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: ffff800014aa1660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:268
2 locks held by getty/3735:
 #0: ffff0000d3358098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001a34b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1200 drivers/tty/n_tty.c:2147
2 locks held by kworker/u4:7/4206:
3 locks held by syz-executor.5/28250:
 #0: ffff0000d53ba0e0 (&type->s_umount_key#61/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229
 #1: ffff0000d70cc158 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk+0x130/0x424 fs/xfs/xfs_qm.c:73
 #2: ffff0001382915d8 (&xfs_dquot_group_class){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:133 [inline]
 #2: ffff0001382915d8 (&xfs_dquot_group_class){+.+.}-{3:3}, at: xfs_qm_flush_one+0xc8/0x2cc fs/xfs/xfs_qm.c:1225
3 locks held by syz-executor.0/31499:
 #0: ffff00013a1520e0 (&type->s_umount_key#61/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0x844 fs/super.c:229
 #1: ffff000132dfe958 (&qinf->qi_tree_lock){+.+.}-{3:3}, at: xfs_qm_dquot_walk+0x130/0x424 fs/xfs/xfs_qm.c:73
 #2: ffff0000c0db6318 (&xfs_dquot_group_class){+.+.}-{3:3}, at: xfs_dqlock fs/xfs/xfs_dquot.h:133 [inline]
 #2: ffff0000c0db6318 (&xfs_dquot_group_class){+.+.}-{3:3}, at: xfs_qm_flush_one+0xc8/0x2cc fs/xfs/xfs_qm.c:1225

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