BUG: memory leak
unreferenced object 0xffff88801837a500 (size 32):
  comm "syz-executor.6", pid 12963, jiffies 4296938479 (age 23.229s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 33  9p-fcall-cache-3
    32 37 00 18 80 88 ff ff 00 00 00 00 00 00 00 00  27..............
  backtrace:
    [<000000001440bbf0>] kstrdup+0x36/0x70 mm/util.c:60
    [<0000000083302a67>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<000000005b805818>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<000000007069b585>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<000000008fd0bb83>] kobject_add_varg lib/kobject.c:392 [inline]
    [<000000008fd0bb83>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000e358f349>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<00000000e9b466e1>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<000000007fa97e43>] create_cache mm/slab_common.c:255 [inline]
    [<000000007fa97e43>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<000000009ddc1b54>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<000000008404d73a>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<0000000027ee6788>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<000000001037f906>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<000000006dd5e28f>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<00000000417d8899>] do_new_mount fs/namespace.c:2917 [inline]
    [<00000000417d8899>] path_mount+0x1429/0x2120 fs/namespace.c:3247
    [<0000000065c318de>] do_mount fs/namespace.c:3260 [inline]
    [<0000000065c318de>] __do_sys_mount fs/namespace.c:3468 [inline]
    [<0000000065c318de>] __se_sys_mount fs/namespace.c:3445 [inline]
    [<0000000065c318de>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3445
    [<00000000f7555330>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed