INFO: task syz.8.2944:13642 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.2944      state:D stack:24904 pid:13642 tgid:13640 ppid:12201  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_timeout+0xc0/0x2c0
 __down_common+0x3b7/0x850
 down+0x80/0xd0
 console_lock+0x58/0x90
 con_write+0x80/0x290
 n_tty_write+0xd49/0x11e0
 file_tty_write+0x509/0x9c0
 vfs_write+0x612/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7c339e159
RSP: 002b:00007fa7c4348028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa7c3625fa0 RCX: 00007fa7c339e159
RDX: 0000000000001006 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007fa7c343506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7c3626038 R14: 00007fa7c3625fa0 R15: 00007ffdc51e6bb8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5423:
 #0: ffff8881699e90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
2 locks held by syz.0.298/6449:
4 locks held by syz.8.2944/13642:
 #0: ffff888112bea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffff888112bea128 (&tty->atomic_write_lock){+.+.}-{4:4}, at: file_tty_write+0x1e4/0x9c0
 #2: ffff888112bea2c8 (&tty->termios_rwsem){++++}-{4:4}, at: n_tty_write+0x1f5/0x11e0
 #3: ffffc9000709b370 (&ldata->output_lock){+.+.}-{4:4}, at: n_tty_write+0x66d/0x11e0
6 locks held by syz.9.2948/13651:
1 lock held by syz.3.3643/15520:
 #0: ffffffff8f45ece0 (vc_sel.lock){+.+.}-{4:4}, at: set_selection_kernel+0x37/0x17c0
2 locks held by syz-executor/15942:
1 lock held by syz.5.4026/16882:
 #0: ffff8881ab579d38 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1dd/0x4e0
2 locks held by syz.5.4026/16885:
2 locks held by syz.5.4026/16889:
2 locks held by syz.2.4027/16891:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 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: 16885 Comm: syz.5.4026 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:stack_trace_consume_entry+0x0/0x280
Code: f0 5b 41 5e 5d c3 cc cc cc cc cc e8 fa 99 1d 0a 66 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 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 ba 00 00
RSP: 0018:ffffc900095d6fa0 EFLAGS: 00000286
RAX: ffffffff823e7042 RBX: ffffc900095d7060 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff823e7042 RDI: ffffc900095d7060
RBP: ffffc900095d7030 R08: ffffc900095d70d0 R09: 0000000000000000
R10: ffffc900095d6ff8 R11: ffffffff81b1ea10 R12: ffff88810b560000
R13: 1ffff110216ac0bf R14: ffffffff81b1ea10 R15: ffffc900095d6fa8
FS:  00007f1edffc66c0(0000) GS:ffff8882a8f59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1edffa4fe0 CR3: 000000016ddd6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 arch_stack_walk+0x10f/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __set_page_owner+0x8d/0x4c0
 post_alloc_hook+0x1f9/0x250
 get_page_from_freelist+0x21fa/0x2270
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x212/0x380
 folio_alloc_mpol_noprof+0x39/0x160
 vma_alloc_folio_noprof+0xe1/0x1e0
 do_pte_missing+0x173a/0x34b0
 handle_mm_fault+0x1b36/0x3080
 __get_user_pages+0x1678/0x2720
 populate_vma_page_range+0x2be/0x3c0
 __mm_populate+0x25f/0x390
 do_mlock+0x615/0x720
 __x64_sys_mlock+0x60/0x70
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1edf19e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1edffc6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000095
RAX: ffffffffffffffda RBX: 00007f1edf425fa0 RCX: 00007f1edf19e159
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 0000200000000000
RBP: 00007f1edf23506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1edf426038 R14: 00007f1edf425fa0 R15: 00007ffe224205a8
 </TASK>
