BUG: memory leak
unreferenced object 0xffff88811abb7ae0 (size 32):
  comm "syz-executor.5", pid 4995, jiffies 4294958254 (age 10.200s)
  hex dump (first 32 bytes):
    6c 6f 6f 70 35 00 00 00 00 00 00 00 00 00 00 00  loop5...........
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff814c56a6>] kstrdup+0x36/0x70 mm/util.c:61
    [<ffffffff814c5733>] kstrdup_const+0x53/0x80 mm/util.c:84
    [<ffffffff823aec02>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
    [<ffffffff824a3f4b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:257
    [<ffffffff824a43cd>] kobject_add_varg lib/kobject.c:352 [inline]
    [<ffffffff824a43cd>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:441
    [<ffffffff81e212da>] nilfs_sysfs_create_device_group+0x9a/0x3d0 fs/nilfs2/sysfs.c:991
    [<ffffffff81e09b5c>] init_nilfs+0x51c/0x680 fs/nilfs2/the_nilfs.c:637
    [<ffffffff81df5bab>] nilfs_fill_super fs/nilfs2/super.c:1047 [inline]
    [<ffffffff81df5bab>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1317
    [<ffffffff8164efcb>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:610
    [<ffffffff815e8768>] vfs_get_tree+0x28/0x100 fs/super.c:1530
    [<ffffffff8162c6f7>] do_new_mount fs/namespace.c:3040 [inline]
    [<ffffffff8162c6f7>] path_mount+0xc37/0x10d0 fs/namespace.c:3370
    [<ffffffff8162d2de>] do_mount fs/namespace.c:3383 [inline]
    [<ffffffff8162d2de>] __do_sys_mount fs/namespace.c:3591 [inline]
    [<ffffffff8162d2de>] __se_sys_mount fs/namespace.c:3568 [inline]
    [<ffffffff8162d2de>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
    [<ffffffff845eab95>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff845eab95>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd