INFO: task syz.2.955:9993 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.955       state:D stack:25128 pid:9993  tgid:9992  ppid:8433   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 super_lock+0x25c/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f157ed8ec29
RSP: 002b:00007f157fbbf038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f157efd5fa0 RCX: 00007f157ed8ec29
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffff80000201
RBP: 00007f157ee11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f157efd6038 R14: 00007f157efd5fa0 R15: 00007ffcb15ee078
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e33d320 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5673:
 #0: ffff88810da9f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by syz-executor/5841:
6 locks held by kworker/1:4/5891:
 #0: ffff88801c302548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90003cffba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88810a41c198 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4a20
 #3: ffff8880257f8198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400
 #4: ffff888111236160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400
 #5: ffff888127ce1c38 (&dev->ctrl_urb_lock){+.+.}-{4:4}, at: em28xx_write_regs_req+0x14d/0x3e0
1 lock held by syz.2.955/9993:
 #0: ffff88803b77e0e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x25c/0x3b0
1 lock held by syz.1.1281/11540:
 #0: ffff88803b77e0e0 (&type->s_umount_key#59){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

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+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 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: 5841 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:__sanitizer_cov_trace_switch+0x37/0x130
Code: c1 f8 48 c1 c1 3d 48 83 f9 02 7f 1e 48 85 c9 74 3c 48 83 f9 01 0f 85 f4 00 00 00 b9 03 00 00 00 48 85 c0 75 36 e9 e5 00 00 00 <48> 83 f9 03 0f 84 cd 00 00 00 48 83 f9 07 0f 85 d1 00 00 00 b9 07
RSP: 0018:ffffc900031f75d8 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffffea00010481c0 RCX: 0000000000000003
RDX: ffff88810880ba00 RSI: ffffffff8e950ea0 RDI: 00000000ffffffff
RBP: ffffc900031f7710 R08: ffff88810880ba00 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000ffffffff
R13: ffffea00010481e0 R14: 1ffff9200063eec0 R15: 1ffffd4000209039
FS:  000055556d9a8500(0000) GS:ffff8881a39fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feba7b73420 CR3: 00000001092b0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 read_node_folio+0x2b7/0x3f0
 __get_node_folio+0x22f/0x1510
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xb4d/0x2440
 kill_f2fs_super+0x2cc/0x6d0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4e598ff57
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:00007ffd107d9c18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc4e5a11c2d RCX: 00007fc4e598ff57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd107d9cd0
RBP: 00007ffd107d9cd0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd107dad60
R13: 00007fc4e5a11c2d R14: 000000000000f47c R15: 00007ffd107dada0
 </TASK>
