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: 5881 at block/genhd.c:547 device_add_disk+0x5d4/0xacc block/genhd.c:-1 Modules linked in: CPU: 0 PID: 5881 Comm: syz.3.109 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : device_add_disk+0x5d4/0xacc block/genhd.c:-1 lr : device_add_disk+0x5d0/0xacc block/genhd.c:545 sp : ffff800020267450 x29: ffff8000202674b0 x28: dfff800000000000 x27: ffff0000f3c2e9c0 x26: ffff0000f3c2eebc x25: 00000000ffffffef x24: ffff0000c1c848a0 x23: 1fffe00018390914 x22: 0000000000000001 x21: ffff0000c1c84890 x20: 0000000000000009 x19: ffff0000c1c84804 x18: 1fffe000341f0596 x17: 1fffe000341f0596 x16: ffff8000082c2df0 x15: ffff8000088db698 x14: 0000000000000001 x13: 1fffe0001e785d47 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff80000a63a048 x8 : ffff0000d7651b40 x7 : 0000000000000000 x6 : ffff80000805b5c8 x5 : ffff0000efc51f98 x4 : 0000000000000000 x3 : ffff80000a93d480 x2 : 0000000000000001 x1 : 0000000000000009 x0 : 0000000000000103 Call trace: device_add_disk+0x5d4/0xacc block/genhd.c:-1 add_disk include/linux/genhd.h:200 [inline] md_alloc+0x6a0/0xa4c 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+0x758/0xe9c fs/open.c:826 vfs_open+0x7c/0x90 fs/open.c:958 do_open fs/namei.c:3616 [inline] path_openat+0x1fc4/0x2718 fs/namei.c:3750 do_filp_open+0x184/0x368 fs/namei.c:3777 do_sys_openat2+0x134/0x3f4 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __arm64_sys_openat+0x118/0x14c fs/open.c:1282 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 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: 740 hardirqs last enabled at (739): [] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231 hardirqs last disabled at (740): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (712): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (712): [] handle_softirqs+0xa40/0xbe4 kernel/softirq.c:604 softirqs last disabled at (557): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (557): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (557): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (557): [] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 ---[ end trace 931da0d96a932abe ]--- kobject_add_internal failed for md (error: -2 parent: md2)