BUG: memory leak
unreferenced object 0xffff888008da06c0 (size 32):
  comm "syz-executor.7", pid 8132, jiffies 4295877742 (age 22.508s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 39  9p-fcall-cache-9
    39 00 da 08 80 88 ff ff 5f 74 00 73 30 00 00 00  9......._t.s0...
  backtrace:
    [<00000000d3304659>] kstrdup+0x36/0x70 mm/util.c:60
    [<00000000c284c5a9>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<000000003db77d0c>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<00000000ce6efd99>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<000000005cdc4aa7>] kobject_add_varg lib/kobject.c:392 [inline]
    [<000000005cdc4aa7>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<000000007071df98>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<00000000e4c8e25d>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<00000000a9a6dbb9>] create_cache mm/slab_common.c:255 [inline]
    [<00000000a9a6dbb9>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<000000006074b721>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<000000002b704102>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<00000000f53a2934>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<000000001e513877>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<0000000087bb0baf>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<000000004426d938>] do_new_mount fs/namespace.c:2918 [inline]
    [<000000004426d938>] path_mount+0x1429/0x2120 fs/namespace.c:3248
    [<000000004e28dbea>] do_mount fs/namespace.c:3261 [inline]
    [<000000004e28dbea>] __do_sys_mount fs/namespace.c:3469 [inline]
    [<000000004e28dbea>] __se_sys_mount fs/namespace.c:3446 [inline]
    [<000000004e28dbea>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3446
    [<0000000076374451>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed