------------[ cut here ]------------
kobject: '(null)' (ffff888026354060): is not initialized, yet kobject_get() is being called.
WARNING: CPU: 0 PID: 18344 at lib/kobject.c:642 kobject_get lib/kobject.c:640 [inline]
WARNING: CPU: 0 PID: 18344 at lib/kobject.c:642 kobject_add_internal+0x115/0xc90 lib/kobject.c:225
Modules linked in:

CPU: 0 PID: 18344 Comm: syz.1.2830 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:kobject_get lib/kobject.c:640 [inline]
RIP: 0010:kobject_add_internal+0x115/0xc90 lib/kobject.c:225
Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 ee 88 61 f7 49 8b 34 24 48 c7 c7 40 0c eb 8b 4c 89 e2 e8 4b 66 d2 f6 <0f> 0b e9 e5 00 00 00 e8 9f a7 08 f7 b8 fe ff ff ff e9 f0 06 00 00
RSP: 0018:ffffc900035878c8 EFLAGS: 00010246
RAX: 4ac512471106c000 RBX: ffff88802cdeb878 RCX: 0000000000080000
RDX: ffffc90011023000 RSI: 000000000000f282 RDI: 000000000000f283
RBP: 0000000000000000 R08: ffffc900035874c7 R09: 1ffff920006b0e98
R10: dffffc0000000000 R11: fffff520006b0e99 R12: ffff888026354060
R13: dffffc0000000000 R14: ffff88802635409c R15: dffffc0000000000
FS:  00007fa1e4bf66c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1e4bf5ff8 CR3: 0000000061f1c000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x164/0x240 lib/kobject.c:426
 bind_rdev_to_array+0xb4e/0x1260 drivers/md/md.c:2490
 md_add_new_disk+0xe2e/0x17a0 drivers/md/md.c:7002
 md_ioctl+0x214c/0x24d0 drivers/md/md.c:7816
 blkdev_ioctl+0x5b2/0x730 block/ioctl.c:639
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa1e699e1d9
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:00007fa1e4bf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa1e6c26090 RCX: 00007fa1e699e1d9
RDX: 0000200000000e40 RSI: 0000000040140921 RDI: 0000000000000004
RBP: 00007fa1e6a35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa1e6c26128 R14: 00007fa1e6c26090 R15: 00007ffce446aee8
 </TASK>