BUG: memory leak
unreferenced object 0xffff888008c37d00 (size 32):
  comm "syz-executor.2", pid 10206, jiffies 4296974766 (age 24.170s)
  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
    39 00 c3 08 80 88 ff ff 00 00 00 00 00 00 00 00  9...............
  backtrace:
    [<00000000bee3c0c5>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000009e7202a9>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<000000004c302cbc>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<00000000dee14798>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<00000000c12bce95>] kobject_add_varg lib/kobject.c:392 [inline]
    [<00000000c12bce95>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000bbb75cdd>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<000000005ed44534>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<00000000c0a2920c>] create_cache mm/slab_common.c:255 [inline]
    [<00000000c0a2920c>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<00000000f26e9546>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<00000000aabb00c8>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<0000000017c49897>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<0000000048f59678>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<00000000055385c4>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<000000004568669d>] do_new_mount fs/namespace.c:2915 [inline]
    [<000000004568669d>] path_mount+0x1429/0x2120 fs/namespace.c:3245
    [<000000008e72e1dc>] do_mount fs/namespace.c:3258 [inline]
    [<000000008e72e1dc>] __do_sys_mount fs/namespace.c:3466 [inline]
    [<000000008e72e1dc>] __se_sys_mount fs/namespace.c:3443 [inline]
    [<000000008e72e1dc>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3443
    [<0000000046883f47>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed