BUG: memory leak
unreferenced object 0xffff88800d50ea40 (size 32):
  comm "syz-executor.5", pid 15482, jiffies 4297782345 (age 23.520s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 32  9p-fcall-cache-2
    31 31 00 0d 80 88 ff ff 11 00 00 00 00 00 00 00  11..............
  backtrace:
    [<00000000fed41982>] kstrdup+0x36/0x70 mm/util.c:60
    [<00000000cfbda8d7>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<00000000553f76bb>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<000000008e7caf19>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<000000002cbfb9f5>] kobject_add_varg lib/kobject.c:392 [inline]
    [<000000002cbfb9f5>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000681f85a8>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<000000008ffdedf9>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<000000004fefc30f>] create_cache mm/slab_common.c:255 [inline]
    [<000000004fefc30f>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<00000000b05fc41b>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<0000000072c0d72a>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<0000000072291123>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<00000000b33540bd>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<0000000094467ba5>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<0000000003caf6d1>] do_new_mount fs/namespace.c:2917 [inline]
    [<0000000003caf6d1>] path_mount+0x1429/0x2120 fs/namespace.c:3247
    [<00000000170e4ee3>] do_mount fs/namespace.c:3260 [inline]
    [<00000000170e4ee3>] __do_sys_mount fs/namespace.c:3468 [inline]
    [<00000000170e4ee3>] __se_sys_mount fs/namespace.c:3445 [inline]
    [<00000000170e4ee3>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3445
    [<000000008743764b>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed