INFO: task udevd:12018 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:22424 pid:12018 tgid:12018 ppid:5061   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+0x785/0x14e0
 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+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f19273169a4
RSP: 002b:00007ffcf7b9ad70 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055da641ba440 RCX: 00007f19273169a4
RDX: 00000000000a0800 RSI: 000055da641a9cc0 RDI: 00000000ffffff9c
RBP: 000055da641a9cc0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055da641a7800 R14: 0000000000000001 R15: 000055da64193910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5439:
 #0: ffff8881110000a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
1 lock held by udevd/12018:
 #0: ffff88816b6f9350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
2 locks held by syz.4.13540/24176:

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

NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24176 Comm: syz.4.13540 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:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: b6 49 aa 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 48 aa 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:ffffc90007fff288 EFLAGS: 00000006
RAX: ffffc90008000000 RBX: ffffffff90c5b301 RCX: ffffc90007fff3f0
RDX: ffffc90007fff401 RSI: dffffc0000000000 RDI: ffffc90007fff3f0
RBP: dffffc0000000000 R08: ffffc90007fff3d8 R09: 0000000000000000
R10: ffffc90007fff438 R11: fffff52000fffe89 R12: ffffc90007fff3e8
R13: ffffc90007ff8000 R14: ffffc90007fff3e8 R15: ffffffff8176f256
FS:  00007f85834056c0(0000) GS:ffff8882a927a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005612bc420000 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40
Code: 48 8d 3d 13 18 8a 04 48 c7 c6 ba 92 f9 8d 67 48 0f b9 3a 90 eb ca cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 31 c0 83 3d 63 b4 86 04 00 74 1d 83 3d 1a e6 86 04 00
RSP: 0018:ffffc90007fff2b0 EFLAGS: 00000206
 unwind_next_frame+0x1b6d/0x2550
 __unwind_start+0x5b8/0x760
 arch_stack_walk+0xe3/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kmem_cache_free+0x44f/0x650
 tear_down_vmas+0x312/0x520
 exit_mmap+0x4b6/0x9e0
 __mmput+0x118/0x430
 exit_mm+0x1f6/0x2d0
 do_exit+0x6a2/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x840
 exit_to_user_mode_loop+0x8c/0x4d0
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f858259ce59
Code: Unable to access opcode bytes at 0x7f858259ce2f.
RSP: 002b:00007f8583405028 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: fffffffffffffe00 RBX: 00007f8582816180 RCX: 00007f858259ce59
RDX: 000000000000006f RSI: 0000000000000084 RDI: 000000000000000b
RBP: 00007f8582632d6f R08: 00002000000002c0 R09: 0000000000000000
R10: 0000200000000280 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8582816218 R14: 00007f8582816180 R15: 00007ffcf10e8258
 </TASK>
