INFO: task syz.7.4899:27957 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.7.4899      state:D stack:24856 pid:27957 tgid:27947 ppid:22586  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x6d8/0xbc0
 migrate_pages_batch+0x17e5/0x4ca0
 migrate_pages+0x20e0/0x2a10
 compact_zone+0x221b/0x4650
 sysctl_compaction_handler+0x4e3/0x870
 proc_sys_call_handler+0x4c8/0x830
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c9459cdd9
RSP: 002b:00007f2c953ce028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2c94816090 RCX: 00007f2c9459cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f2c94632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c94816128 R14: 00007f2c94816090 R15: 00007fff669d9278
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5442:
 #0: ffff8881754130a0 (&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
1 lock held by udevd/17034:
 #0: ffff88816da4a350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
2 locks held by syz.7.4899/27957:
 #0: ffff8881149b62f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff88811f5e8410 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x227/0xb90
2 locks held by syz.1.5817/31734:
1 lock held by syz.4.5819/31736:

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

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/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: 31734 Comm: syz.1.5817 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:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: b6 09 a8 0a e9 81 06 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 31 05 00 00 48 89 c4 48 89 e7 e8 c6 08 a8 0a e9 61 06 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc900090edd78 EFLAGS: 00000087
RAX: ffffffff81a485e5 RBX: ffffffff81a4845f RCX: 0000000000080000
RDX: ffffc9000a4f1000 RSI: 000000000001ffed RDI: ffffffff8e94f1e0
RBP: ffffc900090ede50 R08: ffffffff9030b1f7 R09: 1ffffffff206163e
R10: dffffc0000000000 R11: fffffbfff206163f R12: 0000000000000000
R13: 000000000000007f R14: 0000000000000200 R15: 1ffff9200121dbb8
FS:  00007f1fb6b286c0(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ffa5e3c000 CR3: 00000001a2044000 CR4: 00000000000006f0
Call Trace:
 <TASK>
RIP: 0010:vprintk_emit+0x45d/0x560
Code: 0f 84 44 ff ff ff e8 72 1e 21 00 fb eb 44 e8 6a 1e 21 00 e8 45 9f 03 0a 4d 85 f6 74 94 e8 5b 1e 21 00 fb 48 c7 c7 e0 f1 94 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 3b 18
RSP: 0018:ffffc900090edda0 EFLAGS: 00000287
 _printk+0xdd/0x130
 __mlog_printk+0x283/0x2c0
 ocfs2_block_check_validate+0x2e7/0x640
 ocfs2_validate_inode_block+0x1c0/0x1180
 ocfs2_read_blocks+0xfa7/0x1530
 ocfs2_read_inode_block+0xec/0x1d0
 ocfs2_get_clusters+0x36a/0xc30
 ocfs2_extent_map_get_blocks+0x202/0x6b0
 ocfs2_read_virt_blocks+0x27d/0x9b0
 ocfs2_find_entry+0x3e4/0x21a0
 ocfs2_find_files_on_disk+0xe0/0x340
 ocfs2_lookup_ino_from_name+0x52/0x100
 ocfs2_get_system_file_inode+0x330/0x7e0
 ocfs2_init_global_system_inodes+0x2f6/0x6e0
 ocfs2_fill_super+0x45ac/0x6970
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x341/0xd30
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1fb5b9e04a
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:00007f1fb6b27e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1fb6b27ee0 RCX: 00007f1fb5b9e04a
RDX: 00002000000026c0 RSI: 0000200000000000 RDI: 00007f1fb6b27ea0
RBP: 00002000000026c0 R08: 00007f1fb6b27ee0 R09: 0000000000200000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f1fb6b27ea0 R14: 0000000000004704 R15: 0000200000000100
 </TASK>
