------------[ cut here ]------------
!atomic_read(&kn->count)
WARNING: fs/kernfs/dir.c:560 at kernfs_get+0x72/0x90 fs/kernfs/dir.c:560, CPU#0: syz.3.5059/23611
Modules linked in:
CPU: 0 UID: 0 PID: 23611 Comm: syz.3.5059 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:kernfs_get+0x72/0x90 fs/kernfs/dir.c:560
Code: e8 33 c3 55 ff 48 89 df be 04 00 00 00 e8 66 03 c1 ff f0 ff 03 eb 05 e8 1c c3 55 ff 5b 5d e9 50 42 a0 fe cc e8 0f c3 55 ff 90 <0f> 0b 90 eb d6 89 d9 80 e1 07 80 c1 03 38 c1 7c b6 48 89 df e8 65
RSP: 0018:ffffc90003237620 EFLAGS: 00010287
RAX: ffffffff826ffec1 RBX: ffff8880350a75a0 RCX: 0000000000080000
RDX: ffffc9000e3db000 RSI: 00000000000013fe RDI: 00000000000013ff
RBP: 0000000000000000 R08: ffff8880350a75a3 R09: 1ffff11006a14eb4
R10: dffffc0000000000 R11: ffffed1006a14eb5 R12: ffff888078e71828
R13: 1ffff1100f1ce306 R14: ffff888078e71830 R15: ffff888078e71818
FS:  00007fa8ba47f6c0(0000) GS:ffff88812528d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8b95ea540 CR3: 00000000affc6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 sysfs_get include/linux/sysfs.h:802 [inline]
 create_dir lib/kobject.c:89 [inline]
 kobject_add_internal+0x6be/0xd00 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x163/0x240 lib/kobject.c:426
 class_dir_create_and_add drivers/base/core.c:3234 [inline]
 get_device_parent+0x316/0x3a0 drivers/base/core.c:3285
 device_add+0x2e1/0xbb0 drivers/base/core.c:3615
 netdev_register_kobject+0x178/0x310 net/core/net-sysfs.c:2343
 register_netdevice+0x1456/0x1ec0 net/core/dev.c:11420
 register_netdev+0x40/0x60 net/core/dev.c:11536
 bnep_add_connection+0x6e5/0xca0 net/bluetooth/bnep/core.c:631
 do_bnep_sock_ioctl+0x40b/0x650 net/bluetooth/bnep/sock.c:83
 sock_do_ioctl+0x101/0x320 net/socket.c:1313
 sock_ioctl+0x5c6/0x7f0 net/socket.c:1434
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa8b959ce59
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:00007fa8ba47f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa8b9815fa0 RCX: 00007fa8b959ce59
RDX: 00002000000000c0 RSI: 00000000400442c8 RDI: 0000000000000007
RBP: 00007fa8b9632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa8b9816038 R14: 00007fa8b9815fa0 R15: 00007ffc893d3f78
 </TASK>