BUG: memory leak
unreferenced object 0xffff88800e22f780 (size 32):
  comm "syz-executor.3", pid 11311, jiffies 4296778899 (age 24.016s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 34  9p-fcall-cache-4
    39 35 00 0e 80 88 ff ff 00 00 00 00 00 00 00 00  95..............
  backtrace:
    [<00000000fb308508>] kstrdup+0x36/0x70 mm/util.c:60
    [<0000000048057d41>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<0000000077e08ac3>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<0000000070c1de17>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<000000007a81c8aa>] kobject_add_varg lib/kobject.c:392 [inline]
    [<000000007a81c8aa>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<0000000089fdb435>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<000000007e2b71bd>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<000000008c0e709c>] create_cache mm/slab_common.c:255 [inline]
    [<000000008c0e709c>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<0000000021949c1e>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<00000000513e1770>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<000000008d274ab0>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<00000000c4940d1d>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<0000000050c0cbaf>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<00000000a9e50cc6>] do_new_mount fs/namespace.c:2919 [inline]
    [<00000000a9e50cc6>] path_mount+0x1331/0x21c0 fs/namespace.c:3249
    [<00000000a0006d9b>] do_mount fs/namespace.c:3262 [inline]
    [<00000000a0006d9b>] __do_sys_mount fs/namespace.c:3470 [inline]
    [<00000000a0006d9b>] __se_sys_mount fs/namespace.c:3447 [inline]
    [<00000000a0006d9b>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3447
    [<000000000ec12731>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed