INFO: task syz.0.513:9613 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.513       state:D stack:25464 pid:9613  tgid:9612  ppid:9315   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x883/0x1080
 down_write+0x1bc/0x200
 super_lock+0x289/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75a4b9cdd9
RSP: 002b:00007f75a5a06028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f75a4e15fa0 RCX: 00007f75a4b9cdd9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: ffffffff80000202
RBP: 00007f75a4c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f75a4e16038 R14: 00007f75a4e15fa0 R15: 00007fff706d8038
 </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 getty/5442:
 #0: ffff888176e6f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
4 locks held by syz-executor/5617:
3 locks held by syz-executor/5618:
3 locks held by kworker/u11:3/5619:
 #0: ffff8881acb49140 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900045f7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff8881a57dcea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
2 locks held by syz-executor/6237:
3 locks held by syz-executor/8354:
1 lock held by syz.0.513/9613:
 #0: ffff888012ff60d8 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.5.550/10162:
 #0: ffff888012ff60d8 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.3.579/10343:
 #0: ffff8881131f20d8 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.3.579/10345:
 #0: ffff8881131f20d8 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.7.705/11291:
 #0: ffff888012ff60d8 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.4.725/11507:
 #0: ffff8881734540d8 (&type->s_umount_key#65/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0
4 locks held by dhcpcd-run-hook/11508:
 #0: ffff88823c63aea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
 #1: ffffffff9a48a588 (&____s->seqcount#2){----}-{0:0}, at: ktime_get_real_ts64+0xa9/0x3e0
 #2: ffff888171186318 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210
 #3: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: page_table_check_set+0x126/0x510
5 locks held by rm/11526:

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

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+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: 11508 Comm: dhcpcd-run-hook 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_pc+0x5c/0x70
Code: a8 16 00 00 83 fa 02 75 21 48 8b 91 b0 16 00 00 48 8b 32 48 8d 7e 01 8b 89 ac 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <e9> 0f 5b e5 09 cc 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc90006b2f520 EFLAGS: 00000293
RAX: ffffffff823c6d88 RBX: 0000000000000001 RCX: ffff888178413b00
RDX: 0000000000000000 RSI: ffffffff8c28abc0 RDI: ffffffff8c28ab80
RBP: 0000000000000000 R08: ffffffff823c6a32 R09: ffffffff8e95cd60
R10: dffffc0000000000 R11: fffff94000dcabdf R12: ffffea0006e55ec0
R13: 0000000000000000 R14: ffffea0006e55ec0 R15: 00000068378ca6f6
FS:  00007f007e33b380(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffebb4ec0b8 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 page_ext_put+0x38/0xc0
 __reset_page_owner+0x67/0x1f0
 free_unref_folios+0xcec/0x1480
 folios_put_refs+0x9ff/0xb40
 free_pages_and_swap_cache+0x41d/0x490
 tlb_flush_mmu+0x6d3/0xa30
 tlb_finish_mmu+0xf9/0x230
 exit_mmap+0x498/0x9e0
 __mmput+0x118/0x430
 exit_mm+0x18e/0x250
 do_exit+0x6a2/0x22c0
 do_group_exit+0x21b/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x221a/0x2240
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f007e475a90
Code: Unable to access opcode bytes at 0x7f007e475a66.
RSP: 002b:00007ffebb4ec538 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00005580afacc910 RCX: 00007f007e475a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007ffebb4ec868 R08: 00005580afaccc58 R09: eedfedfe753186e5
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffebb4ec860
R13: 00007ffebb4ec870 R14: 0000558088524169 R15: 00007f007e674a80
 </TASK>
