INFO: task udevd:5856 blocked 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:19584 pid:5856  tgid:5856  ppid:5286   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14bc/0x5000
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb80
 do_read_cache_folio+0x1ad/0x590
 read_part_sector+0xb6/0x2b0
 adfspart_check_POWERTEC+0x8c/0xf30
 bdev_disk_changed+0x75f/0x14b0
 blkdev_get_whole+0x380/0x510
 bdev_open+0x31e/0xd30
 blkdev_open+0x457/0x600
 do_dentry_open+0x7ce/0x1420
 vfs_open+0x3b/0x340
 path_openat+0x340e/0x3dd0
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed9997e9a4
RSP: 002b:00007fff563e0320 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000564bbb839f80 RCX: 00007fed9997e9a4
RDX: 00000000000a0800 RSI: 0000564bbb83b300 RDI: 00000000ffffff9c
RBP: 0000564bbb83b300 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000564bbb843370 R14: 0000000000000001 R15: 0000564bbb825910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8df41a20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/u10:19/4936:
 #0: ffff888100089948 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90022d8fb80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f311c88 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
2 locks held by getty/5661:
 #0: ffff8881145440a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x449/0x1460
1 lock held by udevd/5856:
 #0: ffff888109f44358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
2 locks held by syz.3.4700/23689:
 #0: ffffffff8f304bf0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cc/0x570
 #1: ffffffff8f311c88 (rtnl_mutex){+.+.}-{4:4}, at: register_netdev+0x18/0x60
1 lock held by syz.3.4700/23690:
 #0: ffffffff8f311c88 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x37a/0x1df0
1 lock held by syz.3.4700/23693:
 #0: ffffffff8f311c88 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
2 locks held by syz.1.4701/23688:
 #0: ffffffff8f311c88 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x71c/0xb70
 #1: ffffffff8df47578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
2 locks held by syz.1.4701/23692:
 #0: ffff8881a440a6f0 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: __netlink_dump_start+0xfe/0x7e0
 #1: ffffffff8f311c88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x92/0x200

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf95/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x599/0xb30
 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: 23686 Comm: syz.3.4700 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:native_apic_msr_write+0x39/0x50
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 72 01 56 03 66
RSP: 0000:ffffc90003a47d88 EFLAGS: 00000046
RAX: 000000000000656d RBX: ffff88823c623e40 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000000656d RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff81af68b5 R09: ffffffff998e3508
R10: 0000000000000003 R11: ffffffff81718b10 R12: 000000000ffffca5
R13: dffffc0000000000 R14: 000000000000656d R15: 0000000000000020
FS:  000055557637a500(0000) GS:ffff8882a9e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f515ff8 CR3: 00000001159e2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lapic_next_event+0x11/0x20
 clockevents_program_event+0x1c9/0x350
 hrtimer_interrupt+0x620/0xaa0
 __sysvec_apic_timer_interrupt+0x102/0x3e0
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7fb8481c2088
Code: 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 44 89 c7 <48> 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8 c3 0f 1f
RSP: 002b:00007fff78a64d80 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 00007fb8483e5fa0 RCX: 00007fb8481c2085
RDX: 00007fff78a64dc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fb8483e7da0 R08: 0000000000000000 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000062ea8
R13: 00007fff78a64ee0 R14: ffffffffffffffff R15: 00007fff78a64f00
 </TASK>
