------------[ cut here ]------------
kobject: '(null)' (ffff8880250f40f0): is not initialized, yet kobject_get() is being called.
WARNING: CPU: 1 PID: 5877 at lib/kobject.c:642 kobject_get lib/kobject.c:640 [inline]
WARNING: CPU: 1 PID: 5877 at lib/kobject.c:642 kobject_add_internal+0x115/0xc90 lib/kobject.c:225
Modules linked in:
CPU: 1 PID: 5877 Comm: syz.1.2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
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 5e 4e 5d f7 49 8b 34 24 48 c7 c7 00 4f 0b 8c 4c 89 e2 e8 4b ea cd f6 <0f> 0b e9 e5 00 00 00 e8 8f 45 04 f7 b8 fe ff ff ff e9 f0 06 00 00
RSP: 0018:ffffc90004c278c8 EFLAGS: 00010246
RAX: 010bb07c1f81d500 RBX: ffff88807b8aa878 RCX: 0000000000080000
RDX: ffffc9000e1d7000 RSI: 0000000000002e50 RDI: 0000000000002e51
RBP: 0000000000000000 R08: ffff8880b8d28c53 R09: 1ffff110171a518a
R10: dffffc0000000000 R11: ffffed10171a518b R12: ffff8880250f40f0
R13: dffffc0000000000 R14: ffff8880250f412c R15: dffffc0000000000
FS:  00007f310364e6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e620ff8 CR3: 000000005cde8000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x164/0x240 lib/kobject.c:426
 bind_rdev_to_array+0xb51/0x1270 drivers/md/md.c:2596
 md_add_new_disk+0xe31/0x17b0 drivers/md/md.c:7092
 md_ioctl+0x2152/0x24e0 drivers/md/md.c:7906
 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: 0033:0x7f310279fb19
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:00007f310364e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3102a26090 RCX: 00007f310279fb19
RDX: 00002000000001c0 RSI: 0000000040140921 RDI: 0000000000000004
RBP: 00007f3102837b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3102a26128 R14: 00007f3102a26090 R15: 00007ffc708907b8
 </TASK>