INFO: task syz.4.670:9978 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.670       state:D stack:26200 pid:9978  tgid:9977  ppid:9703   task_flags:0x400140 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
 __se_sys_quotactl+0x3a7/0x9e0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f688199cdd9
RSP: 002b:00007f687fbf6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f6881c15fa0 RCX: 00007f688199cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f6881a32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6881c16038 R14: 00007f6881c15fa0 R15: 00007ffdeefed0f8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kworker/u9:9/1204:
2 locks held by getty/5438:
 #0: ffff88816bf110a0 (&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
2 locks held by syz-executor/8849:
1 lock held by syz.4.670/9978:
 #0: ffff8881bf3a80d8 (&type->s_umount_key#68){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz-executor/12664:
 #0: ffffffff8e963068 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
1 lock held by syz.0.1088/15861:
 #0: ffff8881bf3a80d8 (&type->s_umount_key#68){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.9.1300/18250:
1 lock held by udevadm/18308:

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

NMI backtrace for cpu 1
CPU: 1 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+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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8849 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:trace_tlb_flush+0x11/0x160
Code: 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 55 41 57 41 56 41 54 53 66 90 65 8b 05 03 5a c0 11 <83> f8 08 73 38 89 c3 c1 e8 06 48 8d 3c c5 f0 b3 30 90 be 08 00 00
RSP: 0018:ffffc900055bf2e0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888112be3d40 RCX: 0000000000000028
RDX: 0000000000000001 RSI: ffffffffffffffff RDI: 0000000000000000
RBP: ffff88817476a4c0 R08: ffff888112be460f R09: 1ffff1102257c8c1
R10: dffffc0000000000 R11: ffffed102257c8c2 R12: 00000000000008bb
R13: dffffc0000000000 R14: ffffffffffffffff R15: 0000000000010000
FS:  0000555563ca8500(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd9e7642003 CR3: 000000010bc8e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 switch_mm_irqs_off+0x472/0x690
 __schedule+0x12a0/0x5740
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x760
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__get_node_folio+0xb08/0xdd0
Code: 8b 7c 24 08 be 01 00 00 00 e8 a4 13 ff ff 48 63 db 48 c7 84 24 80 00 00 00 0e 36 e0 45 48 8b 44 24 30 4a c7 04 20 00 00 00 00 <4a> c7 44 20 08 00 00 00 00 65 48 8b 05 b7 5c fd 0e 48 3b 84 24 00
RSP: 0018:ffffc900055bf6a0 EFLAGS: 00000293
RAX: 1ffff92000ab7ee4 RBX: fffffffffffffffe RCX: ffff888176a35880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900055bf7f0 R08: ffffea0006afca37 R09: 1ffffd4000d5f946
R10: dffffc0000000000 R11: fffff94000d5f947 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff888111898000 R15: ffffea0006afca00
 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: 0033:0x7fd2d6d9e017
Code: Unable to access opcode bytes at 0x7fd2d6d9dfed.
RSP: 002b:00007ffdff7b5838 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fd2d6e32120 RCX: 00007fd2d6d9e017
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdff7b58f0
RBP: 00007ffdff7b58f0 R08: 00007ffdff7b68f0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdff7b6980
R13: 00007fd2d6e32120 R14: 000000000002466a R15: 00007ffdff7b69c0
 </TASK>
