BUG: memory leak
unreferenced object 0xffff888122851180 (size 32):
  comm "syz-executor442", pid 7036, jiffies 4294944697 (age 8.140s)
  hex dump (first 32 bytes):
    76 74 69 30 00 74 61 73 6b 2f 37 30 33 36 00 00  vti0.task/7036..
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<0000000023ae3091>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<0000000023ae3091>] slab_post_alloc_hook mm/slab.h:522 [inline]
    [<0000000023ae3091>] slab_alloc mm/slab.c:3319 [inline]
    [<0000000023ae3091>] __do_kmalloc mm/slab.c:3653 [inline]
    [<0000000023ae3091>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3670
    [<000000005b0ab569>] kstrdup+0x3a/0x70 mm/util.c:53
    [<00000000a9afba93>] kstrdup_const+0x48/0x60 mm/util.c:75
    [<0000000011a220a7>] kvasprintf_const+0x7e/0xe0 lib/kasprintf.c:48
    [<000000005a5db917>] kobject_set_name_vargs+0x40/0xe0 lib/kobject.c:289
    [<0000000075d333a1>] dev_set_name+0x63/0x90 drivers/base/core.c:1918
    [<0000000099161116>] netdev_register_kobject+0x5a/0x1b0 net/core/net-sysfs.c:1727
    [<00000000dcd3230b>] register_netdevice+0x397/0x600 net/core/dev.c:8723
    [<000000001aad92f9>] ip_tunnel_newlink+0xda/0x220 net/ipv4/ip_tunnel.c:1141
    [<00000000f787874f>] vti_newlink+0x5e/0x80 net/ipv4/ip_vti.c:530
    [<000000002ed2da6b>] __rtnl_newlink+0x892/0xb30 net/core/rtnetlink.c:3196
    [<00000000f679f83d>] rtnl_newlink+0x4e/0x80 net/core/rtnetlink.c:3254
    [<0000000053d58044>] rtnetlink_rcv_msg+0x178/0x4b0 net/core/rtnetlink.c:5223
    [<000000006ffc36b8>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<000000001f2bbf67>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241
    [<00000000e40376b4>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<00000000e40376b4>] netlink_unicast+0x1ec/0x2d0 net/netlink/af_netlink.c:1328