------------[ cut here ]------------
kobject: '(null)' (ffff888043734060): is not initialized, yet kobject_get() is being called.
WARNING: CPU: 0 PID: 7220 at lib/kobject.c:634 kobject_get lib/kobject.c:632 [inline]
WARNING: CPU: 0 PID: 7220 at lib/kobject.c:634 kobject_add_internal+0x115/0xca0 lib/kobject.c:216
Modules linked in:
CPU: 0 PID: 7220 Comm: syz.3.608 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:kobject_get lib/kobject.c:632 [inline]
RIP: 0010:kobject_add_internal+0x115/0xca0 lib/kobject.c:216
Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 ae 89 b0 f7 49 8b 34 24 48 c7 c7 40 18 d2 8b 4c 89 e2 e8 8b 87 2a f7 <0f> 0b e9 e5 00 00 00 e8 bf 25 5f f7 b8 fe ff ff ff e9 eb 06 00 00
RSP: 0018:ffffc90003297808 EFLAGS: 00010246

RAX: cbb282934d062400 RBX: ffff888056372878 RCX: 0000000000080000
RDX: ffffc90014a87000 RSI: 0000000000003880 RDI: 0000000000003881
RBP: 0000000000000000 R08: ffffffff91b623af R09: 1ffffffff236c475
R10: dffffc0000000000 R11: fffffbfff236c476 R12: ffff888043734060
R13: dffffc0000000000 R14: ffff88804373409c R15: dffffc0000000000
FS:  00007f7f31f866c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c394b0f CR3: 00000000614dd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kobject_add_varg lib/kobject.c:366 [inline]
 kobject_add+0x160/0x230 lib/kobject.c:418
 bind_rdev_to_array+0xb50/0x1260 drivers/md/md.c:2494
 md_add_new_disk+0xe43/0x17b0 drivers/md/md.c:6998
 md_ioctl+0x24f5/0x2880 drivers/md/md.c:7807
 blkdev_ioctl+0x37b/0x740 block/ioctl.c:626
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7f3119fb19
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:00007f7f31f86028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7f31426090 RCX: 00007f7f3119fb19
RDX: 0000200000000200 RSI: 0000000040140921 RDI: 0000000000000004
RBP: 00007f7f31237b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7f31426128 R14: 00007f7f31426090 R15: 00007ffddd6e1868
 </TASK>