------------[ cut here ]------------
kobject: '(null)' (00000000c4000cf4): is not initialized, yet kobject_get() is being called.
WARNING: CPU: 0 PID: 9182 at lib/kobject.c:634 kobject_get lib/kobject.c:632 [inline]
WARNING: CPU: 0 PID: 9182 at lib/kobject.c:634 kobject_add_internal+0xe8/0xb18 lib/kobject.c:216
Modules linked in:
CPU: 0 PID: 9182 Comm: syz.0.1337 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : kobject_get lib/kobject.c:632 [inline]
pc : kobject_add_internal+0xe8/0xb18 lib/kobject.c:216
lr : kobject_get lib/kobject.c:632 [inline]
lr : kobject_add_internal+0xe8/0xb18 lib/kobject.c:216
sp : ffff800022c17610
x29: ffff800022c17620 x28: 1fffe0001e7a7506 x27: ffff0000d9e50018
x26: 1fffe0001e7a7512 x25: ffff0000f3d3a890 x24: dfff800000000000
x23: dfff800000000000 x22: ffff700004582edc x21: 0000000000000000
x20: ffff0000d9e50060 x19: ffff0000f3d3a878 x18: 1fffe00033c1877e
x17: ffff80001641d000 x16: ffff8000082dd38c x15: 0000000040000000
x14: 0000000000000001 x13: 1fffe00033c1ae70 x12: 0000000000000000
x11: ff0080000a982760 x10: 0000000000000003 x9 : 980782f9e3c1de00
x8 : 980782f9e3c1de00 x7 : ffff80000825ab2c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff800011d2dc80 x0 : ffff800187d4d000
Call trace:
 kobject_get lib/kobject.c:632 [inline]
 kobject_add_internal+0xe8/0xb18 lib/kobject.c:216
 kobject_add_varg lib/kobject.c:366 [inline]
 kobject_add+0x144/0x20c lib/kobject.c:418
 bind_rdev_to_array+0x858/0xddc drivers/md/md.c:2493
 md_add_new_disk+0xab8/0x1484 drivers/md/md.c:6997
 md_ioctl+0x2158/0x25cc drivers/md/md.c:7806
 blkdev_ioctl+0x654/0xb74 block/ioctl.c:626
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 910
hardirqs last  enabled at (909): [<ffff80000825abc0>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (909): [<ffff80000825abc0>] finish_lock_switch+0xb0/0x1c8 kernel/sched/core.c:5005
hardirqs last disabled at (910): [<ffff800011bc6d40>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (902): [<ffff8000081ae3b4>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (902): [<ffff8000081ae3b4>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (771): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---