r4 = syz_io_uring_setup(0x4d50, &(0x7f0000000240)={0x0, 0x4, 0x2, 0x0, 0x60, 0x0, r2}, &(0x7f00000a0000)=nil, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000000200), &(0x7f0000000040))
io_uring_register$IORING_REGISTER_FILES(0xffffffffffffffff, 0x2, &(0x7f0000000340)=[r0, 0xffffffffffffffff, r4], 0x3)
BUG: memory leak
unreferenced object 0xffff888008cb6a40 (size 32):
  comm "syz-executor.4", pid 14132, jiffies 4296387911 (age 22.220s)
  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
    30 31 00 08 80 88 ff ff 00 00 00 00 00 00 00 00  01..............
  backtrace:
    [<00000000141ba483>] kstrdup+0x36/0x70 mm/util.c:60
    [<0000000052a2c0e9>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<0000000011091657>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<0000000075fb1a46>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<00000000df7f2542>] kobject_add_varg lib/kobject.c:392 [inline]
    [<00000000df7f2542>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<000000003fd9712c>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<0000000039c4bcd6>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<00000000065cb736>] create_cache mm/slab_common.c:255 [inline]
    [<00000000065cb736>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<00000000a97f63f6>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<00000000b0dc6f1d>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<000000002877b931>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<000000004a56b4df>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<000000003745044b>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<00000000f06a9f2e>] do_new_mount fs/namespace.c:2917 [inline]
    [<00000000f06a9f2e>] path_mount+0x1429/0x2120 fs/namespace.c:3247
    [<000000009a051a4f>] do_mount fs/namespace.c:3260 [inline]
    [<000000009a051a4f>] __do_sys_mount fs/namespace.c:3468 [inline]
    [<000000009a051a4f>] __se_sys_mount fs/namespace.c:3445 [inline]
    [<000000009a051a4f>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3445
    [<0000000076c00783>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed