INFO: task udevd:15102 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:24784 pid:15102 tgid:15102 ppid:5058   task_flags:0x400140 flags:0x00080802
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x836/0xbc0
 do_read_cache_folio+0x1ac/0x590
 read_part_sector+0xb6/0x2b0
 adfspart_check_POWERTEC+0x9a/0x7a0
 bdev_disk_changed+0x851/0x17a0
 blkdev_get_whole+0x372/0x510
 bdev_open+0x324/0xd70
 blkdev_open+0x461/0x600
 do_dentry_open+0x816/0x1380
 vfs_open+0x3b/0x340
 path_openat+0x2e44/0x3830
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x115/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbec79569a4
RSP: 002b:00007ffd5f3abb00 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000555d19800fc0 RCX: 00007fbec79569a4
RDX: 00000000000a0800 RSI: 0000555d197fefb0 RDI: 00000000ffffff9c
RBP: 0000555d197fefb0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000555d197f9b50 R14: 0000000000000001 R15: 0000555d197e2910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e959c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5436:
 #0: ffff8881101910a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
1 lock held by udevd/15102:
 #0: ffff88810477c350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xde/0xd70
5 locks held by kworker/u9:9/20869:
2 locks held by syz.0.28908/28085:
 #0: ffffffff8fe5da28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8ec8e620 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0x135/0x1750
2 locks held by syz.1.31584/7064:
 #0: ffffffff8fe5da28 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8ec8e620 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_cache_flush_doit+0xb5/0x1b0
2 locks held by syz.3.31636/7252:
 #0: ffffffff900fee20 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_fop_write+0x196/0x560
 #1: ffffffff8fded240 (rtnl_mutex){+.+.}-{4:4}, at: cfg80211_rfkill_set_block+0x1e/0x50
3 locks held by syz.4.31638/7254:

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

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/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x388/0x470
 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: 7254 Comm: syz.4.31638 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:wiphy_all_share_dfs_chan_state+0x383/0x670
Code: 24 10 48 8b 44 24 40 42 0f b6 04 38 84 c0 0f 85 ca 00 00 00 48 8b 44 24 08 48 63 00 49 39 c6 0f 8d 93 01 00 00 e8 6d 36 c7 f6 <49> ff c6 48 83 c5 50 e9 8c fe ff ff e8 5c 36 c7 f6 49 8d 3c 2c 48
RSP: 0018:ffffc900076aecc8 EFLAGS: 00000246
RAX: ffffffff8aff2bd3 RBX: ffff8881acd03380 RCX: 0000000000080000
RDX: ffffc9003aa01000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000001110 R08: ffffffff8afe63a5 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e959c60 R12: ffff8881acd04598
R13: ffff8881d99554a4 R14: 0000000000000037 R15: dffffc0000000000
FS:  00007f3f551f16c0(0000) GS:ffff88818dc1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c9a9baff8 CR3: 00000001c9be6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 wiphy_regulatory_register+0x185/0x240
 wiphy_register+0x230e/0x2ff0
 ieee80211_register_hw+0x3d3d/0x4a50
 mac80211_hwsim_new_radio+0x3238/0x5680
 hwsim_new_radio_nl+0xd8b/0xf90
 genl_family_rcv_msg_doit+0x233/0x340
 genl_rcv_msg+0x614/0x7a0
 netlink_rcv_skb+0x226/0x4a0
 genl_rcv+0x28/0x40
 netlink_unicast+0x7bb/0x940
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x13a/0x180
 ____sys_sendmsg+0x54e/0x850
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3f5439ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3f551f1028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3f54615fa0 RCX: 00007f3f5439ce59
RDX: 0000000020040004 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f3f54432e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3f54616038 R14: 00007f3f54615fa0 R15: 00007ffe26fc1af8
 </TASK>
