BUG: memory leak
unreferenced object 0xffff88810ee6ff60 (size 32):
  comm "syz-executor245", pid 6995, jiffies 4294946324 (age 8.010s)
  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:
    [<000000009649c1f9>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<000000009649c1f9>] slab_post_alloc_hook mm/slab.h:522 [inline]
    [<000000009649c1f9>] slab_alloc mm/slab.c:3319 [inline]
    [<000000009649c1f9>] __do_kmalloc mm/slab.c:3653 [inline]
    [<000000009649c1f9>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3670
    [<00000000888bdcdf>] kvasprintf+0x6d/0xe0 lib/kasprintf.c:25
    [<00000000d5aac3ed>] kvasprintf_const+0x96/0xe0 lib/kasprintf.c:49
    [<00000000ad628923>] kobject_set_name_vargs+0x40/0xe0 lib/kobject.c:289
    [<000000001063c919>] kobject_add_varg lib/kobject.c:384 [inline]
    [<000000001063c919>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:473
    [<000000007462104d>] netdev_queue_add_kobject net/core/net-sysfs.c:1461 [inline]
    [<000000007462104d>] netdev_queue_update_kobjects+0x76/0x190 net/core/net-sysfs.c:1490
    [<00000000b4d536b0>] netif_set_real_num_tx_queues+0xa3/0x220 net/core/dev.c:2670
    [<00000000b403ddad>] tun_set_real_num_queues drivers/net/tun.c:631 [inline]
    [<00000000b403ddad>] tun_attach+0x196/0x660 drivers/net/tun.c:876
    [<00000000a907d05a>] tun_set_queue drivers/net/tun.c:2977 [inline]
    [<00000000a907d05a>] __tun_chr_ioctl+0xb40/0x1780 drivers/net/tun.c:3048
    [<000000001bd9a6ac>] tun_chr_ioctl+0x2b/0x40 drivers/net/tun.c:3346
    [<00000000efffdc86>] vfs_ioctl fs/ioctl.c:46 [inline]
    [<00000000efffdc86>] file_ioctl fs/ioctl.c:509 [inline]
    [<00000000efffdc86>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
    [<00000000eea83b46>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
    [<0000000048c752c1>] __do_sys_ioctl fs/ioctl.c:720 [inline]
    [<0000000048c752c1>] __se_sys_ioctl fs/ioctl.c:718 [inline]
    [<0000000048c752c1>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
    [<00000000ccb31b89>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:296
    [<000000008a94c3ef>] entry_SYSCALL_64_after_hwframe+0x44/0xa9