INFO: task syz.4.238:4952 blocked for more than 143 seconds.
      Not tainted 5.15.162-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.238       state:D stack:    0 pid: 4952 ppid:  4624 flags:0x00000009
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6518
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64
 sync_fs_one_sb+0xd8/0x120 fs/sync.c:84
 iterate_supers+0x124/0x1dc fs/super.c:705
 ksys_sync+0xd4/0x1cc fs/sync.c:104
 __arm64_sys_sync+0x14/0x24 fs/sync.c:113
 __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:608
 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: ffff800014b214e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
3 locks held by kworker/u4:3/302:
2 locks held by getty/3723:
 #0: ffff0000d3209098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001a3eb2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158
1 lock held by syz-executor/3970:
 #0: ffff0000d5fb40e0 (&type->s_umount_key#81){++++}-{3:3}, at: deactivate_super+0x100/0x128 fs/super.c:365
2 locks held by kworker/u4:9/4208:
 #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff80001d487c00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
3 locks held by syz.4.142/4441:
2 locks held by syz.4.238/4952:
 #0: ffff0000cf7e00e0 (&type->s_umount_key#82){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:703
 #1: ffff0000cf7e20e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64
1 lock held by syz-executor/5176:
 #0: ffff0000ef1680e0 (&type->s_umount_key#81){++++}-{3:3}, at: deactivate_super+0x100/0x128 fs/super.c:365
2 locks held by syz.4.537/6050:
 #0: ffff0000cf7e00e0 (&type->s_umount_key#82){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:703
 #1: ffff0000cf7e20e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6c/0x108 fs/exfat/super.c:64
1 lock held by syz.0.907/7279:

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