INFO: task kworker/1:10:13436 blocked for more than 144 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:10    state:D stack:22584 pid:13436 tgid:13436 ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: xfs-sync/loop0 xfs_flush_inodes_worker
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 wb_wait_for_completion+0x3b2/0x700
 sync_inodes_sb+0x224/0xbf0
 xfs_flush_inodes_worker+0x61/0x80
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.0.1698:15486 blocked for more than 144 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1698      state:D
 stack:21472 pid:15486 tgid:15485 ppid:13246  task_flags:0x400740 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_timeout+0xc0/0x2c0
 wait_for_completion+0x2ca/0x5e0
 __flush_work+0xa63/0xca0
 xfs_file_buffered_write+0x276/0x870
 __kernel_write_iter+0x44a/0x8f0
 dump_user_range+0xc19/0x12c0
 elf_core_dump+0x3485/0x3a90
 coredump_write+0x1290/0x1960
 vfs_coredump+0x36ff/0x44b0
 get_signal+0x1094/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f217d39e0d9
RSP: 002b:00007f217e2d00e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f217d625fa8 RCX: 00007f217d39e0d9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f217d625fac
RBP: 00007f217d625fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f217d626038 R14: 00007ffe11387e60 R15: 00007ffe11387f48
 </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
4 locks held by kworker/u10:2/62:
2 locks held by getty/5430:
 #0: ffff8881117a80a0 (&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
4 locks held by kworker/1:4/5666:
 #0: ffff888105a8e140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc9000466fc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffff88816a19f1d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30
 #3: ffff8881bd2601d8 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450
4 locks held by kworker/1:10/13436:
 #0: 
ffff88810aa3c140 ((wq_completion)xfs-sync/loop0){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc90009d97c40 ((work_completion)(&mp->m_flush_inodes_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffff888169b580d8 (&type->s_umount_key#53){++++}-{4:4}, at: xfs_flush_inodes_worker+0x45/0x80
 #3: 
ffff888104752870
 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x208/0xbf0
2 locks held by kworker/u9:8/14132:
 #0: ffff888169137140 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc9000458fc40 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
2 locks held by syz.0.1698/15486:
 #0: ffff888169b58450 (sb_writers#14){.+.+}-{0:0}, at: vfs_coredump+0x36ff/0x44b0
 #1: ffff88811b964690 (&sb->s_type->i_mutex_key
#26
){++++}-{4:4}
, at: xfs_ilock+0xee/0x380
2 locks held by syz.8.2222/18900:
 #0: ffff8881105220d8 (&type->s_umount_key#62/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1900
 #1: 
ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770

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

NMI backtrace for cpu 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 62 Comm: kworker/u10:2 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
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: b6 79 cf 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 78 cf 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:ffffc90001745ad8 EFLAGS: 00000093
RAX: ffffffff81a58435 RBX: ffffffff81a582af RCX: ffff888168101e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8eb4bfa0
RBP: ffffc90001745bb0 R08: ffffffff90572337 R09: 1ffffffff20ae466
R10: dffffc0000000000 R11: fffffbfff20ae467 R12: 0000000000000000
R13: 000000000000004b R14: 0000000000000200 R15: 1ffff920002e8b64
FS:  0000000000000000(0000) GS:ffff88818d95c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32df9ff8 CR3: 0000000199e16000 CR4: 00000000000006f0
Call Trace:
 <TASK>
RIP: 0010:vprintk_emit+0x45d/0x560
Code: 0f 84 44 ff ff ff e8 42 67 21 00 fb eb 44 e8 3a 67 21 00 e8 f5 10 2a 0a 4d 85 f6 74 94 e8 2b 67 21 00 fb 48 c7 c7 a0 bf b4 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 2b 18
RSP: 0018:ffffc90001745b00 EFLAGS: 00000293
 _printk+0xdd/0x130
 print_hex_dump+0x1d2/0x2b0
 xfs_hex_dump+0x3d/0x50
 xfs_buf_verifier_error+0x1cc/0x2a0
 xfs_allocbt_read_verify+0x5f/0xe0
 xfs_buf_ioend+0x31b/0x750
 xfs_buf_iowait+0x133/0x420
 xfs_buf_read_map+0x31f/0xa00
 xfs_trans_read_buf_map+0x235/0x820
 xfs_btree_read_buf_block+0x2ae/0x4a0
 xfs_btree_lookup_get_block+0x294/0x4f0
 xfs_btree_lookup+0x43f/0x1320
 xfs_alloc_fixup_trees+0x219/0xd30
 xfs_alloc_cur_finish+0xd5/0x4a0
 xfs_alloc_ag_vextent_near+0xdbc/0x12b0
 xfs_alloc_vextent_iterate_ags+0x651/0x960
 xfs_alloc_vextent_start_ag+0x373/0x850
 xfs_bmapi_allocate+0x18d1/0x2f20
 xfs_bmapi_convert_delalloc+0x879/0x1540
 xfs_writeback_range+0x6ab/0xf80
 iomap_writeback_folio+0x1526/0x2490
 iomap_writepages+0x167/0x2e0
 xfs_vm_writepages+0x2eb/0x3d0
 do_writepages+0x338/0x560
 __writeback_single_inode+0x12e/0xf90
 writeback_sb_inodes+0x9de/0x1b00
 wb_writeback+0x41c/0xad0
 wb_workfn+0x431/0x10f0
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
