INFO: task syz.7.2914:13304 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.7.2914      state:D stack:28216 pid:13304 tgid:13303 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
 do_con_write+0x12c/0x5500
 con_write+0x27/0x290
 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: 0033:0x7f155679e0d9
RSP: 002b:00007f15576db028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1556a25fa0 RCX: 00007f155679e0d9
RDX: 0000000000001006 RSI: 0000200000000a00 RDI: 0000000000000004
RBP: 00007f1556835024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1556a26038 R14: 00007f1556a25fa0 R15: 00007fffbed6c538
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8eb59c20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by getty/5423:
6 locks held by syz.6.2808/13048:
4 locks held by syz.7.2914/13304:
 #0: ffff888115d120a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffff888115d12128 (&tty->atomic_write_lock){+.+.}-{4:4}, at: file_tty_write+0x1e4/0x9c0
 #2: ffff888115d122c8 (&tty->termios_rwsem){++++}-{4:4}, at: n_tty_write+0x1f5/0x11e0
 #3: ffffc90008c8b370 (&ldata->output_lock){+.+.}-{4:4}, at: n_tty_write+0x66d/0x11e0
6 locks held by syz.1.4503/17572:
2 locks held by syz.2.4505/17576:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 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: 17572 Comm: syz.1.4503 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:__lock_acquire+0x18fa/0x2cf0
Code: 14 25 ff 0f 00 00 39 05 20 40 d1 12 73 06 89 05 18 40 d1 12 48 8b 02 48 89 df 4c 39 e8 0f 84 34 fe ff ff 4c 89 78 30 48 8b 00 <4c> 39 e8 75 f4 48 89 df e9 20 fe ff ff 48 89 fb 48 c7 c7 90 7d a2
RSP: 0018:ffffc90003e9efb0 EFLAGS: 00000006
RAX: ffffffff97209d78 RBX: 00000000000003fd RCX: 00000000000005a9
RDX: ffffffff96f7e3d8 RSI: ffff88810a5c8c90 RDI: 00000000000003fd
RBP: b18c5c55f67206a3 R08: ffffc90003e9ef78 R09: 0000000000000020
R10: 0000000000000000 R11: ffffffff81a30b80 R12: 00000000000005a8
R13: ffffffff94157ec0 R14: ffff88810a5c8000 R15: ffffffff96f85d08
FS:  00007f0babfcf6c0(0000) GS:ffff8882a8f5d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3511dff8 CR3: 0000000176910000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x106/0x350
 _raw_spin_lock_irqsave+0x40/0x60
 debug_object_activate+0xb7/0x420
 __mod_timer+0xa5a/0xed0
 blk_mq_start_request+0x36d/0x870
 loop_queue_rq+0x77/0xb50
 blk_mq_try_issue_directly+0x3f4/0x880
 blk_mq_submit_bio+0x20c0/0x2a40
 submit_bio_noacct_nocheck+0x2f4/0xa40
 __bread_gfp+0x1e9/0x380
 ntfs_read_run_nb_ra+0x71a/0x1160
 ntfs_read_bh_ra+0x47/0x820
 mi_read+0x1da/0x5b0
 mi_format_new+0x1a1/0x610
 ntfs_new_inode+0x66/0x100
 ntfs_create_inode+0x516/0x32c0
 ntfs_mknod+0x3b/0x50
 vfs_mknod+0x441/0x600
 filename_mknodat+0x3cb/0x660
 __se_sys_mknod+0x3a/0x150
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0bab19e0d9
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:00007f0babfcf028 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f0bab425fa0 RCX: 00007f0bab19e0d9
RDX: 0000000000000702 RSI: 0000000000002003 RDI: 0000200000000040
RBP: 00007f0bab235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0bab426038 R14: 00007f0bab425fa0 R15: 00007ffc67f458d8
 </TASK>
