INFO: task udevd:1674 blocked in I/O wait for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:22016 pid:1674  tgid:1674  ppid:5067   task_flags:0x400140 flags:0x00080802
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x6d8/0xbc0
 do_read_cache_folio+0x1ad/0x590
 read_part_sector+0xb6/0x2b0
 adfspart_check_POWERTEC+0x9a/0x7a0
 bdev_disk_changed+0x817/0x1770
 blkdev_get_whole+0x380/0x510
 bdev_open+0x31e/0xd30
 blkdev_open+0x470/0x610
 do_dentry_open+0x822/0x13a0
 vfs_open+0x3b/0x340
 path_openat+0x2e08/0x3860
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x113/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc303169a4
RSP: 002b:00007fff4b255470 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055a4441f2890 RCX: 00007fdc303169a4
RDX: 00000000000a0800 RSI: 000055a4441f9ff0 RDI: 00000000ffffff9c
RBP: 000055a4441f9ff0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055a4441e9800 R14: 0000000000000001 R15: 000055a4441d5910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cc20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5444:
 #0: ffff8881114e30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034482e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
1 lock held by udevd/1674:
 #0: ffff8881047c2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
5 locks held by syz.1.19021/17162:
2 locks held by syz.2.19023/17173:
 #0: ffffffff8fe386a8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8e7f9968 (umhelper_sem){++++}-{4:4}, at: usermodehelper_read_trylock+0xfc/0x2c0
4 locks held by syz.0.19028/17195:
5 locks held by syz.0.19028/17196:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
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+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
net_ratelimit: 6 callbacks suppressed
IPVS: sed: UDP 224.0.0.2:0 - no destination available
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 3808 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_preemption_disabled+0x22/0xe0
Code: 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 27 7e 90 07 65 8b 0d 1c 7e 90 07 f7 c1 ff ff ff 7f 74 0c 5b 41 5e 41 5f 5d <c3> cc cc cc cc cc 9c 59 f7 c1 00 02 00 00 74 ea 65 4c 8b 3d ce 7d
RSP: 0018:ffffc90000006ac8 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000303
RDX: 0000000000000000 RSI: ffffffff8dfbeb09 RDI: ffffffff8c28b8e0
RBP: ffffffff81b26d39 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff206069f R12: 0000000000000000
R13: ffff888121028298 R14: 0000000000000001 R15: 0000000000000046
FS:  0000000000000000(0000) GS:ffff88818dca0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b340ffff8 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0xcd/0x350
 _raw_spin_lock+0x2e/0x40
 __hrtimer_rearm_deferred+0x99/0x450
 irqentry_exit+0x875/0x8b0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:vprintk_emit+0x45d/0x560
Code: 0f 84 44 ff ff ff e8 b2 2b 21 00 fb eb 44 e8 aa 2b 21 00 e8 25 da 02 0a 4d 85 f6 74 94 e8 9b 2b 21 00 fb 48 c7 c7 40 f0 94 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 cb 18
RSP: 0018:ffffc90000006cc0 EFLAGS: 00000246
RAX: ffffffff81a48b15 RBX: ffffffff81a4898f RCX: ffff88811c9c3b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffffffff8e94f040
RBP: ffffc90000006d70 R08: ffffffff903034f7 R09: 1ffffffff206069e
R10: dffffc0000000000 R11: fffffbfff206069f R12: 0000000000000000
R13: 0000000000000035 R14: 0000000000000200 R15: 1ffff92000000d9c
 _printk+0xdd/0x130
 ip_vs_sed_schedule+0x12a/0x380
 ip_vs_schedule+0xac7/0x1d70
 udp_conn_schedule+0x391/0x7a0
 ip_vs_in_hook+0xc50/0x1bf0
 nf_hook_slow+0xc5/0x220
 nf_hook+0x22a/0x3a0
 __ip_local_out+0x558/0x6a0
 ip_local_out+0x2a/0x190
 iptunnel_xmit+0x621/0xd10
 udp_tunnel_xmit_skb+0x2b8/0x410
 tipc_udp_xmit+0x877/0xba0
 tipc_crypto_xmit+0x1bb3/0x2600
 tipc_bearer_xmit_skb+0x245/0x400
 tipc_disc_timeout+0x595/0x6f0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:x2apic_send_IPI+0x73/0xe0
Code: 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 75 42 41 8b 16 0f ae f0 0f ae e8 83 fb 02 b8 00 04 00 00 0f 45 c3 b9 30 08 00 00 0f 30 <66> 90 5b 41 5c 41 5e 41 5f 5d e9 fe f7 34 0a cc 89 fe 89 fd 48 c7
RSP: 0018:ffffc9000885f6d0 EFLAGS: 00000206
RAX: 00000000000000fb RBX: 00000000000000fb RCX: 0000000000000830
RDX: 0000000000000001 RSI: 00000000000000fb RDI: 0000000000000001
RBP: ffffc9000885f840 R08: ffffffff903034f7 R09: 1ffffffff206069e
R10: dffffc0000000000 R11: ffffffff81745300 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88823c6201b0 R15: ffffffff8e262798
 smp_call_function_many_cond+0xc26/0x13d0
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f5/0x1160
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_disable_cpuslocked+0xc5/0x1a0
 static_key_disable+0x1a/0x20
 toggle_allocation_gate+0x1fe/0x290
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
