INFO: task syz.0.420:7639 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.420       state:D stack:27648 pid:7639  tgid:7638  ppid:5819   task_flags:0x400040 flags:0x00080002
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
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd28a98f749
RSP: 002b:00007fd28b901038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fd28abe5fa0 RCX: 00007fd28a98f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007fd28aa13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd28abe6038 R14: 00007fd28abe5fa0 R15: 00007ffe3edca0c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8df3d6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/0:2/794:
 #0: ffff888100075948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90005c7fba0 ((work_completion)(&sbi->s_error_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88819eaa0088 (&sbi->sb_lock){++++}-{4:4}, at: f2fs_record_error_work+0x59/0x1d0
2 locks held by getty/5639:
 #0: ffff8881152310a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz-executor/5810:
1 lock held by syz.0.420/7639:
 #0: ffff88817165c0e0 (&type->s_umount_key#79){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.1274/10797:
 #0: ffff88817165c0e0 (&type->s_umount_key#79){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.1339/10982:
 #0: ffff88817165c0e0 (&type->s_umount_key#79){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/11304:
 #0: ffff88811bbc40e0 (&type->s_umount_key#50){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
7 locks held by syz.7.1475/11661:
2 locks held by udevadm/11683:

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

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: 36 Comm: kworker/u10:1 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
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__update_page_owner_handle+0x1ce/0x570
Code: de e8 26 d9 90 ff 4c 39 eb 0f 84 cd 02 00 00 48 8b 1d 36 7f d8 0b 48 8d 3c 2b 48 83 c7 08 48 89 f8 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 06 02 00 00 48 01 eb 8b 44 24 0c 89 43 08 48 89 d8 48
RSP: 0018:ffffc90000ac71c0 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: 0000000000000008 RCX: ffff888161a89d00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888163105b90
RBP: ffff888163105b80 R08: 0000000000000000 R09: ffffffff822f2baa
R10: ffff888161a8a600 R11: ffffffff81ac2e10 R12: 0000000000000003
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000001bb459
FS:  0000000000000000(0000) GS:ffff8882a9f3b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6dbbe88001 CR3: 0000000116b10000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __set_page_owner+0x10b/0x4c0
 post_alloc_hook+0x234/0x290
 get_page_from_freelist+0x2365/0x2440
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x96/0x350
 ___slab_alloc+0xf56/0x1990
 __slab_alloc+0x65/0x100
 __kmalloc_node_track_caller_noprof+0x5c7/0x800
 kmalloc_reserve+0x136/0x290
 __alloc_skb+0x142/0x2d0
 nsim_dev_trap_report_work+0x29a/0xb80
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
