sendmsg$nl_generic(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000480)={&(0x7f00000020c0)={0x14, 0x1f, 0xc21, 0x80000, 0x0, {0x0, 0x0, 0x2}}, 0x14}}, 0x0)
BUG: memory leak
unreferenced object 0xffff88800c8f6dc0 (size 32):
  comm "syz-executor.2", pid 12480, jiffies 4297611815 (age 19.725s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 31  9p-fcall-cache-1
    35 30 35 00 80 88 ff ff 00 00 00 00 00 00 00 00  505.............
  backtrace:
    [<00000000ddf82202>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000002e2adaaf>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<00000000798237ff>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<000000008280fb05>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<00000000b7fb487e>] kobject_add_varg lib/kobject.c:392 [inline]
    [<00000000b7fb487e>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000001b7f12>] sysfs_slab_add+0x172/0x200 mm/slub.c:5631
    [<000000008700cce2>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4450
    [<0000000066852eed>] create_cache mm/slab_common.c:255 [inline]
    [<0000000066852eed>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<0000000088026873>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<000000007cee6f23>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<00000000dfc89639>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<000000004a37e5d6>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<00000000ccb9cf6c>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<0000000028ca6210>] do_new_mount fs/namespace.c:3006 [inline]
    [<0000000028ca6210>] path_mount+0x1490/0x21e0 fs/namespace.c:3336
    [<000000004ce0d29a>] do_mount fs/namespace.c:3349 [inline]
    [<000000004ce0d29a>] __do_sys_mount fs/namespace.c:3557 [inline]
    [<000000004ce0d29a>] __se_sys_mount fs/namespace.c:3534 [inline]
    [<000000004ce0d29a>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3534
    [<000000003e644f1b>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed