INFO: task udevd:17258 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:22392 pid:17258 tgid:17258 ppid:5245   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 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: 0033:0x7fc6b35169a4
RSP: 002b:00007ffcba854640 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055bc37f3b780 RCX: 00007fc6b35169a4
RDX: 00000000000a0800 RSI: 000055bc37f28ec0 RDI: 00000000ffffff9c
RBP: 000055bc37f28ec0 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055bc37f2f800 R14: 0000000000000001 R15: 000055bc37f1b910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95d020 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5620:
 #0: ffff88811639c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
1 lock held by udevd/17258:
 #0: ffff88810b3d2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
1 lock held by syz.0.7507/1888:
 #0: ffff888011faca40 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240
2 locks held by syz.1.7514/1916:
 #0: ffffffff8fdc0208 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4f7/0x730
 #1: ffffffff8fdceb00 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x2d7/0x840
2 locks held by syz.1.7514/1920:
 #0: ffffffff8fe3de08 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8fdceb00 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_pre_doit+0x5e/0x8a0
2 locks held by syz.1.7514/1922:
1 lock held by syz.2.7515/1917:
 #0: ffff8880484de538 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x234/0x4f0
2 locks held by syz.2.7515/1918:
 #0: ffffffff8fdc0208 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4f7/0x730
 #1: ffffffff8fdceb00 (rtnl_mutex){+.+.}-{4:4}, at: register_netdev+0x18/0x60
4 locks held by syz.2.7515/1919:
 #0: ffffffff8fe3de08 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8fdceb00 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_pre_doit+0x5e/0x8a0
 #2: ffff888029b90780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: nl80211_del_interface+0x126/0x140
 #3: ffffffff8e963328 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by syz.2.7515/1921:

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

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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfaa/0x1000
 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: 1916 Comm: syz.1.7514 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:batadv_hardif_get_by_netdev+0x15f/0x3d0
Code: f6 4c 8b 3d 13 43 23 0f 49 81 ff 00 6c a0 9a 0f 84 a8 01 00 00 4c 89 6c 24 10 49 8d 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 17 02 b4 f6 4c 39 2b 74 0a e8 cd 34 48 f6 e9 fd
RSP: 0018:ffffc9000b4cf680 EFLAGS: 00000246
RAX: 1ffff110379f1103 RBX: ffff8881bcf88818 RCX: 0000000000080000
RDX: ffffc90008d93000 RSI: 000000000003c6cb RDI: 000000000003c6cc
RBP: ffffc9000b4cf728 R08: ffffffff8b7d2829 R09: ffffffff8e95d020
R10: dffffc0000000000 R11: ffffffff8b7d6800 R12: dffffc0000000000
R13: ffff88802118a000 R14: 1ffff92001699ed4 R15: ffff8881bcf88800
FS:  00007fa7eb9826c0(0000) GS:ffff88818dc45000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa7e8dd4ff8 CR3: 000000016c06a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 batadv_hard_if_event+0x82/0x1700
 notifier_call_chain+0x1ad/0x3d0
 register_netdevice+0x1268/0x1cf0
 __ip_tunnel_create+0x3e8/0x560
 ip_tunnel_init_net+0x2e7/0x840
 ops_init+0x35c/0x5c0
 setup_net+0x118/0x340
 copy_net_ns+0x50e/0x730
 create_new_namespaces+0x3e7/0x6a0
 unshare_nsproxy_namespaces+0x149/0x190
 ksys_unshare+0x54e/0x970
 __x64_sys_unshare+0x38/0x50
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7eab9cdd9
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:00007fa7eb982028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fa7eae15fa0 RCX: 00007fa7eab9cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000062040200
RBP: 00007fa7eac32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7eae16038 R14: 00007fa7eae15fa0 R15: 00007ffe0b890558
 </TASK>
