BUG: memory leak
unreferenced object 0xffff888119cf2560 (size 32):
  comm "syz-executor064", pid 6986, jiffies 4294941918 (age 8.040s)
  hex dump (first 32 bytes):
    74 78 2d 31 00 6e 65 74 2f 74 75 6e 00 00 00 00  tx-1.net/tun....
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000d773c43a>] kmemleak_alloc_recursive /./include/linux/kmemleak.h:43 [inline]
    [<00000000d773c43a>] slab_post_alloc_hook /mm/slab.h:522 [inline]
    [<00000000d773c43a>] slab_alloc /mm/slab.c:3319 [inline]
    [<00000000d773c43a>] __do_kmalloc /mm/slab.c:3653 [inline]
    [<00000000d773c43a>] __kmalloc_track_caller+0x169/0x2d0 /mm/slab.c:3670
    [<00000000f4cbc11f>] kvasprintf+0x6d/0xe0 /lib/kasprintf.c:25
    [<00000000c417a329>] kvasprintf_const+0x96/0xe0 /lib/kasprintf.c:49
    [<0000000025b216f4>] kobject_set_name_vargs+0x40/0xe0 /lib/kobject.c:289
    [<00000000f2703575>] kobject_add_varg /lib/kobject.c:384 [inline]
    [<00000000f2703575>] kobject_init_and_add+0x6d/0xc0 /lib/kobject.c:473
    [<00000000718f770d>] netdev_queue_add_kobject /net/core/net-sysfs.c:1461 [inline]
    [<00000000718f770d>] netdev_queue_update_kobjects+0x76/0x190 /net/core/net-sysfs.c:1490
    [<00000000dad155f2>] netif_set_real_num_tx_queues+0xa3/0x220 /net/core/dev.c:2670
    [<0000000092cde79d>] tun_set_real_num_queues /drivers/net/tun.c:631 [inline]
    [<0000000092cde79d>] tun_attach+0x196/0x680 /drivers/net/tun.c:876
    [<00000000b0c9a560>] tun_set_iff /drivers/net/tun.c:2728 [inline]
    [<00000000b0c9a560>] __tun_chr_ioctl+0xd23/0x1690 /drivers/net/tun.c:3066
    [<00000000af6b6c73>] tun_chr_ioctl+0x2b/0x40 /drivers/net/tun.c:3346
    [<000000009e44bfcb>] vfs_ioctl /fs/ioctl.c:46 [inline]
    [<000000009e44bfcb>] file_ioctl /fs/ioctl.c:509 [inline]
    [<000000009e44bfcb>] do_vfs_ioctl+0x63f/0x830 /fs/ioctl.c:696
    [<00000000b449d1e4>] ksys_ioctl+0x86/0xb0 /fs/ioctl.c:713
    [<00000000822bd0b0>] __do_sys_ioctl /fs/ioctl.c:720 [inline]
    [<00000000822bd0b0>] __se_sys_ioctl /fs/ioctl.c:718 [inline]
    [<00000000822bd0b0>] __x64_sys_ioctl+0x1e/0x30 /fs/ioctl.c:718
    [<000000007d5336fe>] do_syscall_64+0x76/0x1a0 /arch/x86/entry/common.c:296
    [<0000000080209193>] entry_SYSCALL_64_after_hwframe+0x44/0xa9