INFO: task udevd:6757 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:19864 pid:6757  tgid:6757  ppid:5296   task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 do_read_cache_folio+0x1aa/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+0x3a8/0x510
 do_dentry_open+0x953/0x13f0
 vfs_open+0x3b/0x340
 path_openat+0x2ee5/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5fc9169a4
RSP: 002b:00007fff48f2dad0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00005650e2e9d780 RCX: 00007fe5fc9169a4
RDX: 00000000000a0800 RSI: 00005650e2e92a50 RDI: 00000000ffffff9c
RBP: 00005650e2e92a50 R08: 0000000000000001 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 00005650e2e91800 R14: 0000000000000001 R15: 00005650e2e7d910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5674:
 #0: ffff888029e610a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by udevd/6757:
 #0: ffff888022817358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30

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

NMI backtrace for cpu 1
CPU: 1 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 5278 Comm: syslogd 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:check_preemption_disabled+0x1e/0x120
Code: 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 65 48 8b 05 be 5e 26 07 48 89 44 24 08 65 8b 05 c6 5e 26 07 <65> 8b 0d bb 5e 26 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d 9b 5e 26
RSP: 0018:ffffc90001d8f4c8 EFLAGS: 00000082
RAX: 0000000000000000 RBX: ffff88804b039f80 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: ffffffff8b8a5f40 RDI: ffffffff8be33880
RBP: ffffc90001d8f718 R08: ffff88810762d3f3 R09: 1ffff11020ec5a7e
R10: dffffc0000000000 R11: ffffed1020ec5a7f R12: dffffc0000000000
R13: 1ffff11009607557 R14: ffff88810762a040 R15: 0000607e5c009250
FS:  00007fe86a46f380(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff48f2cd38 CR3: 000000010ea80000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __schedule+0x1517/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 __skb_wait_for_more_packets+0x3a2/0x580
 __unix_dgram_recvmsg+0x284/0xd60
 sock_recvmsg+0x22c/0x270
 sock_read_iter+0x231/0x2f0
 vfs_read+0x55a/0xa30
 ksys_read+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe86a5c3b6a
Code: Unable to access opcode bytes at 0x7fe86a5c3b40.
RSP: 002b:00007fffc44baee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fe86a5c3b6a
RDX: 00000000000000ff RSI: 0000564b14f38950 RDI: 0000000000000000
RBP: 0000564b14f38910 R08: 000000000000c000 R09: 0000000000000000
R10: 0000564b14f38f00 R11: 0000000000000246 R12: 0000564b14f3899c
R13: 0000564b14f38950 R14: 0000000000000000 R15: 00007fe86a7a8a80
 </TASK>
