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kobject: (ffff88817a6fe000): attempted to be registered with empty name!
WARNING: lib/kobject.c:221 at kobject_add_internal+0x13f/0xcd0, CPU#1: syz.1.10495/28109
Modules linked in:
CPU: 1 UID: 0 PID: 28109 Comm: syz.1.10495 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:kobject_add_internal+0x142/0xcd0
Code: e9 e4 00 00 00 e8 6e c7 cf f5 b8 fe ff ff ff e9 fb 06 00 00 e8 5f c7 cf f5 eb 05 e8 58 c7 cf f5 48 8d 3d 91 37 b7 05 48 89 de <67> 48 0f b9 3a b8 ea ff ff ff e9 d6 06 00 00 4c 8d 73 20 4d 89 f5
RSP: 0018:ffffc900046af008 EFLAGS: 00010293
RAX: ffffffff8bf94e78 RBX: ffff88817a6fe000 RCX: ffff8881033ebc00
RDX: 0000000000000000 RSI: ffff88817a6fe000 RDI: ffffffff91b08610
RBP: 0000000000000000 R08: ffffc900046af0d7 R09: 0000000000000000
R10: ffffc900046af0c0 R11: fffff520008d5e1b R12: 1ffff1102f4dfc00
R13: dffffc0000000000 R14: ffff8881713ed9c0 R15: dffffc0000000000
FS:  00007f3cfaf916c0(0000) GS:ffff8882a7a20000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000019cf8e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 kobject_add+0x163/0x240
 device_add+0x3fa/0xb80
 vdpasim_net_dev_add+0x2c0/0x3d0
 vdpa_nl_cmd_dev_add_set_doit+0xa8b/0xbd0
 genl_family_rcv_msg_doit+0x233/0x340
 genl_rcv_msg+0x614/0x7a0
 netlink_rcv_skb+0x226/0x4a0
 genl_rcv+0x28/0x40
 netlink_unicast+0x8ef/0xa80
 netlink_sendmsg+0x7f0/0xb20
 sock_sendmsg_nosec+0x14e/0x190
 ____sys_sendmsg+0x54e/0x850
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3cfa19f559
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:00007f3cfaf91028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3cfa426090 RCX: 00007f3cfa19f559
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000002e
RBP: 00007f3cfa236b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3cfa426128 R14: 00007f3cfa426090 R15: 00007ffdfc170c98
 </TASK>
