el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 kobject_add_internal failed for md2 with -EEXIST, don't try to register things with the same name in the same directory. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9780 at block/genhd.c:547 device_add_disk+0x5d8/0xad0 block/genhd.c:-1 Modules linked in: CPU: 0 PID: 9780 Comm: syz.4.1417 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : device_add_disk+0x5d8/0xad0 block/genhd.c:-1 lr : device_add_disk+0x5d4/0xad0 block/genhd.c:545 sp : ffff800020f47450 x29: ffff800020f474b0 x28: dfff800000000000 x27: ffff0000e285de00 x26: ffff0000e285e2fc x25: 00000000ffffffef x24: ffff0000dc4914a0 x23: 1fffe0001b892294 x22: 0000000000000001 x21: ffff0000dc491490 x20: 0000000000000009 x19: ffff0000dc491400 x18: 0000000000000002 x17: 0000000040000000 x16: ffff8000082c0bc8 x15: ffff8000088d3308 x14: ffff8000088d2e04 x13: ffff8000111b85b8 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a5ffec4 x8 : ffff0000cb4b8000 x7 : 0000000000000000 x6 : ffff80000805b444 x5 : ffff0000eff88ce8 x4 : 0000000000000000 x3 : ffff80000a8ff780 x2 : 0000000000000001 x1 : 0000000000000009 x0 : 0000000000000103 Call trace: device_add_disk+0x5d8/0xad0 block/genhd.c:-1 add_disk include/linux/genhd.h:200 [inline] md_alloc+0x6a0/0xa54 drivers/md/md.c:5782 md_probe+0x6c/0x88 drivers/md/md.c:5812 blk_probe_dev block/genhd.c:685 [inline] blk_request_module+0x274/0x29c block/genhd.c:-1 blkdev_get_no_open+0x4c/0x1b4 block/bdev.c:740 blkdev_get_by_dev+0x84/0x874 block/bdev.c:807 blkdev_open+0x108/0x27c block/fops.c:466 do_dentry_open+0x760/0xebc fs/open.c:826 vfs_open+0x7c/0x90 fs/open.c:956 do_open fs/namei.c:3608 [inline] path_openat+0x1f80/0x26e4 fs/namei.c:3742 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 1410 hardirqs last enabled at (1409): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231 hardirqs last disabled at (1410): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (1380): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (1380): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (1263): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (1263): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (1263): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (1263): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 5d7f1803cc533eae ]--- kobject_add_internal failed for md (error: -2 parent: md2)