INFO: task udevd:19291 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:24552 pid:19291 tgid:19291 ppid:5057   task_flags:0x400140 flags:0x00080802
Call Trace:
 <TASK>
 __schedule+0x17dd/0x5830
 schedule+0x164/0x2b0
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x85e/0xc40
 do_read_cache_folio+0x1ac/0x590
 read_part_sector+0xb6/0x2b0
 adfspart_check_POWERTEC+0x9a/0x7a0
 bdev_disk_changed+0x851/0x1680
 blkdev_get_whole+0x372/0x510
 bdev_open+0x324/0xd70
 blkdev_open+0x461/0x600
 do_dentry_open+0x80e/0x1360
 vfs_open_consume+0x4a/0x350
 path_openat+0x16fc/0x20f0
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x115/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1e6a9169a4
RSP: 002b:00007fff3a48aa90 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000561b7103b780 RCX: 00007f1e6a9169a4
RDX: 00000000000a0800 RSI: 0000561b7102f1a0 RDI: 00000000ffffff9c
RBP: 0000561b7102f1a0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000561b7102caa0 R14: 0000000000000001 R15: 0000561b7101b910
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/36: 1, last CPU#1:
 #0: ffffffff8ff5a320 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
locks held by getty/5437: 2, on CPU#0:
 #0: ffff888179ca60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034832e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
locks held by udevd/19291: 1, on CPU#0:
 #0: ffff88816c53d350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xde/0xd70
locks held by syz.0.6972/12362: 6, on CPU#0:
 #0: ffffffff914f05a8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff914f03e0 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0x10b/0x7a0
 #2: ffffffff9087f3e8 (vdpa_dev_lock){++++}-{4:4}, at: vdpa_nl_cmd_dev_add_set_doit+0x582/0xbd0
 #3: ffff888106a92128 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x430
 #4: ffff88803592b1b0 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x430
 #5: ffffffff9148c2a0 (rtnl_mutex){+.+.}-{4:4}, at: virtnet_probe+0x2f2f/0x4840
locks held by syz.2.6973/12365: 2, last CPU#0:
 #0: ffffffff9148c2a0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc1d/0x1c30
 #1: ffffffff8ff5a320 (rcu_read_lock){....}-{1:3}, at: if_nlmsg_size+0x6ca/0xa80
locks held by cmp/12373: 1, last CPU#1:
 #0: ffff8881af8c7180 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1ed/0x520
locks held by syz.1.6974/12376: 1, last CPU#0:
 #0: ffffffff8ff5a320 (rcu_read_lock){....}-{1:3}, at: __page_table_check_zero+0x6c/0x430

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 36 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+0x17d/0x390
 sys_info+0x135/0x170
 watchdog+0x1073/0x10f0
 kthread+0x38b/0x480
 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: 35 Comm: pr/ttyS0 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
RIP: 0010:io_serial_out+0x7c/0xc0
Code: b1 45 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 cc 8e bc 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:ffffc90000ab7900 EFLAGS: 00000002
RAX: 0000000000000070 RBX: 0000000000000070 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff85836420 R12: dffffc0000000000
R13: 0000000000000070 R14: ffffffff9bfee700 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88818c020000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005587678e9000 CR3: 000000001cc44000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __serial8250_console_fifo_write+0x1e6/0x3e0
 serial8250_console_write+0xa7e/0x1200
 nbcon_emit_next_record+0xef5/0x1a90
 nbcon_kthread_func+0x6d9/0x8d0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
