RBP: 00007f0b3282b024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b32a1c128 R14: 00007f0b32a1c090 R15: 00007ffe16866558
 </TASK>
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: 7430 at block/genhd.c:547 device_add_disk+0x731/0xd00 block/genhd.c:545
Modules linked in:
CPU: 0 PID: 7430 Comm: syz.4.1022 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:device_add_disk+0x731/0xd00 block/genhd.c:547
Code: b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 a9 04 00 00 8b 33 48 c7 c7 80 f1 90 8c e8 76 3e 37 00 eb 05 e8 9f a8 a6 fd <0f> 0b 41 bd 01 00 00 00 44 89 e8 48 83 c4 50 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000c8176f8 EFLAGS: 00010293
RAX: ffffffff83d25411 RBX: ffff888056492000 RCX: ffff888023500000
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000103
RBP: 0000000000000009 R08: ffff8880562523bb R09: 1ffff1100ac4a477
R10: dffffc0000000000 R11: ffffed100ac4a478 R12: ffff888056252340
R13: 1ffff1100ac92414 R14: 1ffff1100ac92400 R15: ffff888056252380
FS:  00007f0b31dd36c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6e2adf7c0 CR3: 0000000057128000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 add_disk include/linux/genhd.h:200 [inline]
 md_alloc+0x80e/0xc10 drivers/md/md.c:5782
 blk_probe_dev block/genhd.c:685 [inline]
 blk_request_module+0x26e/0x290 block/genhd.c:-1
 blkdev_get_no_open+0x38/0x1d0 block/bdev.c:736
 blkdev_get_by_dev+0x77/0xa50 block/bdev.c:803
 blkdev_open+0x128/0x2c0 block/fops.c:466
 do_dentry_open+0x7f7/0xf90 fs/open.c:826
 do_open fs/namei.c:3616 [inline]
 path_openat+0x2718/0x2fb0 fs/namei.c:3750
 do_filp_open+0x1df/0x400 fs/namei.c:3777
 do_sys_openat2+0x14b/0x500 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]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0b327940d9
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:00007f0b31dd3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f0b32a1c090 RCX: 00007f0b327940d9
RDX: 0000000000000000 RSI: 0000200000000a80 RDI: ffffffffffffff9c
RBP: 00007f0b3282b024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b32a1c128 R14: 00007f0b32a1c090 R15: 00007ffe16866558
 </TASK>