INFO: task syz.7.909:12849 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.909       state:D stack:28328 pid:12849 tgid:12847 ppid:11889  task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 ksys_sync+0x94/0x150
 __ia32_sys_sync+0xe/0x20
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa895d8eba9
RSP: 002b:00007fa896c50038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fa895fd6090 RCX: 00007fa895d8eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa895fd6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa895fd6128 R14: 00007fa895fd6090 R15: 00007fffe57d1ae8
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5681:
 #0: ffff888021bcb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz-executor/9467:
1 lock held by syz.7.909/12849:
 #0: ffff88811f1400e0 (&type->s_umount_key#50){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by udevd/14813:
1 lock held by syz.8.1170/14983:
 #0: ffff88811f1400e0 (&type->s_umount_key#50){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.7.1246/15691:
 #0: ffff88811f1400e0 (&type->s_umount_key#50){++++}-{4:4}, at: super_lock+0x25c/0x3b0
2 locks held by syz.0.1279/15902:
2 locks held by syz.6.1280/15927:
 #0: ffff88804b039f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff88804b024008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 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: 9467 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:radix_tree_lookup+0x5/0x290
Code: f6 eb b1 e8 ad 5c 4a f6 eb d6 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 50 48 89 f3 49 89 fe 48 bd 00 00 00 00
RSP: 0018:ffffc9000379f588 EFLAGS: 00000293
RAX: ffffffff840f020a RBX: 000000000000000a RCX: ffff888109753980
RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff8881258c8020
RBP: 0000000000000000 R08: ffff8881258c80cf R09: 1ffff11024b19019
R10: dffffc0000000000 R11: ffffed1024b1901a R12: ffff88812012c000
R13: dffffc0000000000 R14: ffffc9000379f69d R15: ffff8881258c8000
FS:  0000555563fe2500(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2bf49799 CR3: 000000010d0d0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __lookup_nat_cache+0x25/0x2a0
 f2fs_get_node_info+0x125/0x1480
 read_node_folio+0x20a/0x3f0
 __get_node_folio+0x22a/0x1410
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xb6e/0x1df0
 kill_f2fs_super+0x2c3/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5bcfd8fed7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 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 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffdfc9a4018 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f5bcfe11c05 RCX: 00007f5bcfd8fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdfc9a40d0
RBP: 00007ffdfc9a40d0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdfc9a5160
R13: 00007f5bcfe11c05 R14: 0000000000036ec9 R15: 00007ffdfc9a51a0
 </TASK>
