INFO: task syz.2.800:10154 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.800       state:D stack:23448 pid:10154 tgid:10153 ppid:8454   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x836/0xbc0
 migrate_pages_batch+0x23f7/0x4f50
 migrate_pages+0x1fab/0x2920
 compact_zone+0x34ba/0x4ca0
 sysctl_compaction_handler+0x4e3/0x880
 proc_sys_call_handler+0x4c6/0x830
 vfs_write+0x612/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ba7d9e0d9
RSP: 002b:00007f6ba8cd9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6ba8025fa0 RCX: 00007f6ba7d9e0d9
RDX: 0000000000000001 RSI: 0000200000000040 RDI: 0000000000000006
RBP: 00007f6ba7e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ba8026038 R14: 00007f6ba8025fa0 R15: 00007fff05b11358
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5423:
 #0: ffff88816f1100a0 (&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
1 lock held by udevd/5597:
1 lock held by udevd/5598:
 #0: ffff88810ad1a350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xde/0xd70
4 locks held by kworker/u10:6/6709:
3 locks held by kworker/u10:7/8848:
2 locks held by syz.2.800/10154:
 #0: ffff88810d8b44f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff88816eb0e450 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
1 lock held by syz.7.1422/13790:
 #0: ffff8881a3dac0d8 (&type->s_umount_key#62/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1900
1 lock held by syz.6.1423/13792:
1 lock held by syz.1.1424/13796:
 #0: ffff88811cc800d8 (&type->s_umount_key#62/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1900

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

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: 13790 Comm: syz.7.1422 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:io_serial_out+0x7c/0xc0
Code: 09 5f fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 bc bd cd fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc90006eef270 EFLAGS: 00000002
RAX: 0000000000000039 RBX: 0000000000000039 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f8 R08: 000000000001a32e R09: 0000000000400000
R10: 00000000003465c8 R11: ffffffff8567e1e0 R12: dffffc0000000000
R13: ffffffff9aad5140 R14: ffffffff9aad5180 R15: 0000000000000000
FS:  00007f9084fbf6c0(0000) GS:ffff8882a8f56000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4e4f24de68 CR3: 00000001abbb0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 serial8250_console_write+0x13b6/0x1ba0
 console_flush_all+0x6ea/0xaf0
 console_unlock+0xd1/0x1c0
 vprintk_emit+0x485/0x560
 _printk+0xdd/0x130
 xfs_printk_level+0x1ae/0x2c0
 xfs_qm_quotacheck+0x636/0x6d0
 xfs_qm_mount_quotas+0x25c/0x660
 xfs_mountfs+0x1bc8/0x2380
 xfs_fs_fill_super+0x115a/0x15a0
 get_tree_bdev_flags+0x430/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f908419f34a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f9084fbee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9084fbeee0 RCX: 00007f908419f34a
RDX: 0000200000009600 RSI: 0000200000009640 RDI: 00007f9084fbeea0
RBP: 0000200000009600 R08: 00007f9084fbeee0 R09: 0000000002200800
R10: 0000000002200800 R11: 0000000000000246 R12: 0000200000009640
R13: 00007f9084fbeea0 R14: 0000000000009606 R15: 0000200000000080
 </TASK>
