INFO: task syz.1.2793:25924 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2793      state:D stack:25464 pid:25924 tgid:25923 ppid:25493  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x250
 __ia32_sys_sync+0xa0/0x120
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f90a139cdd9
RSP: 002b:00007f90a2247028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f90a1615fa0 RCX: 00007f90a139cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f90a1615fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f90a1616038 R14: 00007f90a1615fa0 R15: 00007ffc5961f568
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by dhcpcd/5356:
 #0: ffff88823c63aea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
2 locks held by getty/5442:
 #0: ffff8881736fd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
3 locks held by syz-executor/24197:
1 lock held by syz.1.2793/25924:
 #0: ffff8881a87040d8 (&type->s_umount_key#67){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.8.3279/28584:
 #0: ffff8881a87040d8 (&type->s_umount_key#67){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.4.3358/29080:
 #0: ffff8881a87040d8 (&type->s_umount_key#67){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.4.3358/29083:
 #0: ffff8881a87040d8 (&type->s_umount_key#67){++++}-{4:4}, at: super_lock+0x2d6/0x3d0

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24197 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:check_preemption_disabled+0x29/0xe0
Code: 90 55 41 57 41 56 53 65 8b 05 87 5f 90 07 65 8b 0d 7c 5f 90 07 f7 c1 ff ff ff 7f 74 0c 5b 41 5e 41 5f 5d e9 d9 d7 02 00 cc 9c <59> f7 c1 00 02 00 00 74 ea 65 4c 8b 3d 2e 5f 90 07 41 f6 47 2f 04
RSP: 0018:ffffc90008bdf3f0 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 00000000ffffffff RCX: 0000000080000000
RDX: ffff88810acc1d80 RSI: ffffffff8dfc04e6 RDI: ffffffff8c28aee0
RBP: 00000000ffffffff R08: ffffffff8202dafd R09: ffffffff8e95cd60
R10: ffffc90008bdf580 R11: fffff5200117beb3 R12: 0000000000000246
R13: ffff88810acc1d80 R14: ffffffff8e95cd60 R15: 1ffff9200117beaf
FS:  000055556732c500(0000) GS:ffff8882a928c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05db3ea2f8 CR3: 000000010c848000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_is_held_type+0x5a/0x150
 xas_start+0x295/0x770
 xas_load+0x2c/0x5b0
 filemap_get_entry+0x181/0x3f0
 __filemap_get_folio_mpol+0x6d/0xb00
 __get_node_folio+0x20e/0xdd0
 f2fs_update_inode_page+0x83/0x2e0
 f2fs_write_checkpoint+0xbee/0x26a0
 kill_f2fs_super+0x314/0x730
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xf3/0x4d0
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5cfb99e017
Code: a2 c7 05 dc 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe5b1f6828 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f5cfba32120 RCX: 00007f5cfb99e017
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe5b1f68e0
RBP: 00007ffe5b1f68e0 R08: 00007ffe5b1f78e0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe5b1f7970
R13: 00007f5cfba32120 R14: 00000000000a87bb R15: 00007ffe5b1f79b0
 </TASK>
