------------[ cut here ]------------
kobject: '(null)' (0000000087c349ed): is not initialized, yet kobject_get() is being called.
WARNING: CPU: 0 PID: 5799 at lib/kobject.c:634 kobject_get lib/kobject.c:632 [inline]
WARNING: CPU: 0 PID: 5799 at lib/kobject.c:634 kobject_add_internal+0xe8/0xb18 lib/kobject.c:216
Modules linked in:
CPU: 0 PID: 5799 Comm: syz.4.268 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 : ffff800020ee7610
x29: ffff800020ee7620 x28: 1fffe0001e488c06 x27: ffff0000f5d64018
x26: 1fffe0001e488c12 x25: ffff0000f2446090 x24: dfff800000000000
x23: dfff800000000000 x22: ffff7000041dcedc x21: 0000000000000000
x20: ffff0000f5d64060 x19: ffff0000f2446078 x18: 1fffe00033e62d7e
x17: ffff8000153cd000 x16: ffff8000082dd38c x15: 0000000040000000
x14: 0000000000000001 x13: 1fffe00033e65470 x12: 0000000000000000
x11: ff0080000a9825c0 x10: 0000000000000003 x9 : fc89e9898e42fa00
x8 : fc89e9898e42fa00 x7 : ffff80000825ab2c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff800011d2dc80 x0 : ffff800189ff0000
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: 684
hardirqs last  enabled at (683): [<ffff80000825abc0>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (683): [<ffff80000825abc0>] finish_lock_switch+0xb0/0x1c8 kernel/sched/core.c:5005
hardirqs last disabled at (684): [<ffff800011bc4ff0>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (622): [<ffff800008031254>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (620): [<ffff800008031220>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---