BUG: memory leak
unreferenced object 0xffff888110636980 (size 32):
  comm "syz-executor306", pid 8478, jiffies 4294942497 (age 14.060s)
  hex dump (first 32 bytes):
    6c 6f 6f 70 30 00 00 00 00 00 00 00 00 00 00 00  loop0...........
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000009165c445>] kstrdup+0x36/0x70 mm/util.c:60
    [<00000000756b8b59>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<000000003c63ffcb>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
    [<00000000911bbdbb>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289
    [<00000000fc8e8d41>] kobject_add_varg lib/kobject.c:384 [inline]
    [<00000000fc8e8d41>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:473
    [<00000000d0803281>] nilfs_sysfs_create_device_group+0x98/0x3a0 fs/nilfs2/sysfs.c:999
    [<00000000798cae77>] init_nilfs+0x523/0x680 fs/nilfs2/the_nilfs.c:637
    [<00000000543fa17d>] nilfs_fill_super fs/nilfs2/super.c:1046 [inline]
    [<00000000543fa17d>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1316
    [<00000000daa5ae71>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:592
    [<000000004ceab138>] vfs_get_tree+0x28/0x100 fs/super.c:1549
    [<000000002e635d5d>] do_new_mount fs/namespace.c:2875 [inline]
    [<000000002e635d5d>] path_mount+0xc5e/0x1170 fs/namespace.c:3205
    [<0000000063eeb2ec>] do_mount fs/namespace.c:3218 [inline]
    [<0000000063eeb2ec>] __do_sys_mount fs/namespace.c:3426 [inline]
    [<0000000063eeb2ec>] __se_sys_mount fs/namespace.c:3403 [inline]
    [<0000000063eeb2ec>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3403
    [<00000000ddc1f19f>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<0000000037564328>] entry_SYSCALL_64_after_hwframe+0x44/0xa9