INFO: task udevd:10421 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:22120 pid:10421 tgid:10421 ppid:5280   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 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+0x92/0xef0
 bdev_disk_changed+0x765/0x14c0
 blkdev_get_whole+0x380/0x510
 bdev_open+0x31e/0xd30
 blkdev_open+0x470/0x610
 do_dentry_open+0x7ce/0x1420
 vfs_open+0x3b/0x340
 path_openat+0x3486/0x3e20
 do_filp_open+0x22d/0x490
 do_sys_openat2+0x12f/0x220
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f908ad169a4
RSP: 002b:00007ffe91765050 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055eaa4ac0250 RCX: 00007f908ad169a4
RDX: 00000000000a0800 RSI: 000055eaa4a9a4c0 RDI: 00000000ffffff9c
RBP: 000055eaa4a9a4c0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055eaa4ab0950 R14: 0000000000000001 R15: 000055eaa4a99910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e341b20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5655:
 #0: ffff888111ed80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
3 locks held by kworker/1:8/9612:
 #0: ffff888100076948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc90003da7bc0 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f714fc8 (rtnl_mutex){+.+.}-{4:4}, at: crda_timeout_work+0x16/0x80
1 lock held by udevd/10421:
 #0: ffff8881bb7af358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
3 locks held by kworker/u8:9/19276:
 #0: ffff88816e191948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc90003ab7bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f714fc8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0
2 locks held by syz.2.4684/24605:
 #0: ffffffff8f714fc8 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
 #1: ffffffff8e347678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by syz.3.4685/24608:
 #0: ffffffff8f714fc8 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x3bc/0x1e10
1 lock held by syz.3.4685/24613:
 #0: ffffffff8f714fc8 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x32b/0x1b30
1 lock held by syz.4.4686/24610:
 #0: ffffffff8f714fc8 (rtnl_mutex){+.+.}-{4:4}, at: ip6_mroute_setsockopt+0xa18/0xf90

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

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+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 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: 5816 Comm: syz-executor 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:fpregs_restore_userregs+0xfa/0x1e0
Code: fd 75 07 e8 98 56 58 00 eb 45 e8 91 56 58 00 49 8d 7e 10 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 7a 55 bf 00 49 8b 7e 10 <be> ff 1c 0e 00 e8 4c d4 ff ff 4c 89 f7 e8 c4 12 00 00 4c 89 f0 48
RSP: 0018:ffffc90004917ea0 EFLAGS: 00000046
RAX: 1ffff1102d410e32 RBX: ffff88816a0857c0 RCX: ffff88816a0857c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88816a0871c0
RBP: 0000000000000000 R08: ffff88816a0857c7 R09: 1ffff1102d410af8
R10: dffffc0000000000 R11: ffffed102d410af9 R12: dffffc0000000000
R13: 1ffff1102d410afd R14: ffff88816a087180 R15: 0000000000000000
FS:  000055558a071500(0000) GS:ffff88818e408000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001129bc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 arch_exit_to_user_mode_prepare+0x9d/0xc0
 do_syscall_64+0x163/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ecfd55ed7
Code: 48 89 fa 4c 89 df e8 a8 56 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffcac1e9b90 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 000055558a071500 RCX: 00007f6ecfd55ed7
RDX: 00007ffcac1e9bd0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffcac1ea0b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004
R13: 00007ffcac1e9c0c R14: 00007ffcac1e9ca0 R15: 0000000000000000
 </TASK>
