INFO: task udevd:7926 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:25760 pid:7926  tgid:7926  ppid:5060   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: 0033:0x7fe17e5169a4
RSP: 002b:00007ffc50761cb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055ba55184260 RCX: 00007fe17e5169a4
RDX: 00000000000a0800 RSI: 000055ba5515b5b0 RDI: 00000000ffffff9c
RBP: 000055ba5515b5b0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055ba5516d120 R14: 0000000000000001 R15: 000055ba5515a910
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/35: 1, last CPU#1:
 #0: ffffffff8ff5a320 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
locks held by getty/5448: 2, on CPU#1:
 #0: ffff8881776cf0a0 (&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 kworker/u8:2/5449: 2, last CPU#0:
 #0: ffff888175b58948 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc90004aa7c40 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
locks held by udevd/7926: 1, on CPU#1:
 #0: ffff88816ab34350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xde/0xd70
locks held by kworker/0:12/7981: 4, last CPU#0:
 #0: ffff88810006ad48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc9000605fc40 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #2: ffffc9000605f770 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0x106/0xfd0
 #3: ffffc9000605f798 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0x106/0xfd0
locks held by syz.0.2562/16784: 2, on CPU#1:
 #0: ffffffff9148c2a0 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x767/0xc00
 #1: ffffffff8ff609a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2cb/0x760
locks held by syz-executor/16789: 2, last CPU#1:
 #0: ffff888013dc2460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88816b6ea100 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: filename_create+0x200/0x370

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

NMI backtrace for cpu 1
CPU: 1 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+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: 5449 Comm: kworker/u8:2 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: bat_events batadv_tt_purge
RIP: 0010:mark_lock+0x9c/0x190
Code: 0f 00 75 13 48 8d 3d f3 45 fc 0f 48 c7 c6 f7 a0 7c 8e 67 48 0f b9 3a 90 31 c9 4c 89 fe 4c 89 f7 b8 01 00 00 00 85 69 60 74 10 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 49 89 fe 49 89 f7
RSP: 0018:ffffc90000007a50 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000005 RCX: ffffffff95670bf8
RDX: 0000000000000005 RSI: ffff88816ea7aa28 RDI: ffff88816ea79e00
RBP: 0000000000000020 R08: ffffffff81b62757 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff233ae58 R12: 0000000000000055
R13: ffff88816ea7a9b0 R14: ffff88816ea79e00 R15: ffff88816ea79e00
FS:  0000000000000000(0000) GS:ffff88818c01f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f02db3f4158 CR3: 000000000fd48000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __lock_acquire+0x71e/0x2de0
 lock_acquire+0x115/0x350
 seqcount_lockdep_reader_access+0x55/0x100
 ktime_get_update_offsets_now+0x87/0x3f0
 hrtimer_interrupt+0x543/0xaa0
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80
Code: f7 e8 4d 46 9f f5 f7 c3 00 02 00 00 74 05 e8 50 e7 cb f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 64 3a 90 f5 65 48 8b 05 ac 91 ba 08 48 85 c0 74 18 5b 41 5e c3
RSP: 0018:ffffc90000007f48 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000287 RCX: 8000000000000102
RDX: 0000000000000002 RSI: ffffffff8e6a21bd RDI: 0000000000000001
RBP: 8000000000000101 R08: ffffffff919d72bf R09: 1ffffffff233ae57
R10: dffffc0000000000 R11: fffffbfff233ae58 R12: 0000000000000008
R13: 0000000000000009 R14: ffff888120c28600 R15: 0000000000000000
 handle_softirqs+0x265/0x8d0
 do_softirq+0x77/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x140
 batadv_tt_purge+0x4ee/0xa40
 process_scheduled_works+0xc3d/0x1630
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
