BUG: memory leak
unreferenced object 0xffff888009b3d580 (size 32):
  comm "syz-executor.6", pid 15605, jiffies 4297827111 (age 23.501s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 35  9p-fcall-cache-5
    38 30 00 09 80 88 ff ff 00 00 00 00 00 00 00 00  80..............
  backtrace:
    [<000000006967a326>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000005a4f2eb2>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<00000000d819b01e>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<00000000782dbe21>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<0000000087d4b574>] kobject_add_varg lib/kobject.c:392 [inline]
    [<0000000087d4b574>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000d13fbb03>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<00000000424c2928>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<000000008cf57f87>] create_cache mm/slab_common.c:255 [inline]
    [<000000008cf57f87>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<00000000b24dbd1e>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<0000000071503045>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<000000008605c7f0>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<000000005016aeba>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<00000000a225c199>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<00000000f41507c1>] do_new_mount fs/namespace.c:2919 [inline]
    [<00000000f41507c1>] path_mount+0x1331/0x21c0 fs/namespace.c:3249
    [<000000000e00c113>] do_mount fs/namespace.c:3262 [inline]
    [<000000000e00c113>] __do_sys_mount fs/namespace.c:3470 [inline]
    [<000000000e00c113>] __se_sys_mount fs/namespace.c:3447 [inline]
    [<000000000e00c113>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3447
    [<0000000008916085>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed