INFO: task syz.0.122:4481 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.0.122       state:D stack:    0 pid: 4481 ppid:  4023 flags:0x00000009
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
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6515
 rwsem_down_read_slowpath+0x5b0/0x988 kernel/locking/rwsem.c:1055
 __down_read_common kernel/locking/rwsem.c:1239 [inline]
 __down_read kernel/locking/rwsem.c:1252 [inline]
 down_read+0x10c/0x398 kernel/locking/rwsem.c:1500
 iterate_supers+0xb0/0x1dc fs/super.c:716
 ksys_sync+0xb4/0x1cc fs/sync.c:102
 __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: ffff800014d42360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
1 lock held by udevd/3643:
2 locks held by getty/3786:
 #0: ffff0000d44d2098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001bfd02e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158
1 lock held by syz-executor/4026:
 #0: ffff0000d32400e0 (&type->s_umount_key#57){++++}-{3:3}, at: deactivate_super+0x100/0x128 fs/super.c:365
3 locks held by kworker/1:6/4071:
1 lock held by syz.0.122/4481:
 #0: ffff0000d32400e0 (&type->s_umount_key#57){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716
3 locks held by syz.2.296/5313:
 #0: ffff0000dc17a5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x128/0x170 fs/file.c:1058
 #1: ffff0000d6ee0460 (sb_writers#4){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:927 [inline]
 #1: ffff0000d6ee0460 (sb_writers#4){.+.+}-{0:0}, at: do_writev+0x20c/0x3ec fs/read_write.c:971
 #2: ffff0000d32400e0 (&type->s_umount_key#57){++++}-{3:3}, at: iterate_supers+0xb0/0x1dc fs/super.c:716
2 locks held by kworker/u4:17/5920:
1 lock held by syz.8.612/6924:
 #0: ffff800016cb4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
2 locks held by syz.8.612/6932:
 #0: ffff800016cb4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 #1: ffff0000cba7b530 (&idev->mc_lock){+.+.}-{3:3}, at: __ipv6_dev_mc_dec+0x7c/0x324 net/ipv6/mcast.c:970
1 lock held by syz.7.610/6935:
 #0: ffff800014d46870 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x54/0x4b0 kernel/rcu/tree.c:4039
2 locks held by sed/6952:

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