INFO: task syz.3.957:10609 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.957       state:D
 stack:24456 pid:10609 tgid:10608 ppid:6713   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 super_lock+0x1c8/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e8dd8ebe9
RSP: 002b:00007f6e8eb73038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f6e8dfc5fa0 RCX: 00007f6e8dd8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f6e8de11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6e8dfc6038 R14: 00007f6e8dfc5fa0 R15: 00007ffefe6e0768
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e33cda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
5 locks held by kworker/u10:1/36:
2 locks held by getty/5670:
 #0: ffff88810fdd80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900028fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz.6.871/10254:
 #0: ffff88803ca7c0e0 (&type->s_umount_key#104/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970
2 locks held by syz-executor/10839:
 #0: ffff888110ebe0e0 (&type->s_umount_key#56){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffff88803bd00278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900
1 lock held by syz.7.1481/13282:

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x47f/0x820
 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: 13282 Comm: syz.7.1481 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:check_preemption_disabled+0x59/0x120
Code: 8b 0d ab a4 43 07 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9 51 c9 02 00 cc 48 c7 04 24 00 00 00 00 9c <8f> 04 24 f7 04 24 00 02 00 00 74 c8 65 4c 8b 3c 25 08 60 c2 92 41
RSP: 0018:ffffc90002a57328 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff8b8135dd RCX: 0000000080000000
RDX: ffffc90007c91000 RSI: ffffffff8dc0d85b RDI: ffffffff8c037100
RBP: ffffc90002a57430 R08: ffffffff99ebfbe7 R09: 1ffffffff33d7f7c
R10: dffffc0000000000 R11: fffffbfff33d7f7d R12: ffffc90002a574c0
R13: 00000003fffffffc R14: 1ffff9200054ae74 R15: dffffc0000000000
FS:  00007f52b40686c0(0000) GS:ffff8880b83fa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f52b31733e0 CR3: 000000002d3d4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lockdep_hardirqs_off+0xab/0x110
 trace_hardirqs_off+0x12/0x40
 _raw_spin_lock_irq+0x7d/0xf0
 shmem_add_to_page_cache+0x72d/0xba0
 shmem_alloc_and_add_folio+0x846/0xf60
 shmem_get_folio_gfp+0x59d/0x1660
 shmem_fault+0x179/0x390
 __do_fault+0x138/0x390
 __handle_mm_fault+0x35e3/0x5400
 handle_mm_fault+0x40a/0x8e0
 __get_user_pages+0x1699/0x2ce0
 populate_vma_page_range+0x29f/0x3a0
 __mm_populate+0x24c/0x380
 vm_mmap_pgoff+0x387/0x4d0
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f52b318ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f52b4068038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f52b33c5fa0 RCX: 00007f52b318ebe9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f52b3211e19 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f52b33c6038 R14: 00007f52b33c5fa0 R15: 00007ffe6c03b208
 </TASK>
