executing program
BUG: memory leak
unreferenced object 0xffff8881198cc040 (size 64):
  comm "syz-executor771", pid 7042, jiffies 4294949054 (age 19.440s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    50 c0 8c 19 81 88 ff ff 50 c0 8c 19 81 88 ff ff  P.......P.......
  backtrace:
    [<000000004039b535>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<000000004039b535>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<000000004039b535>] slab_alloc mm/slab.c:3319 [inline]
    [<000000004039b535>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<00000000dbc50383>] kmalloc include/linux/slab.h:556 [inline]
    [<00000000dbc50383>] netdev_name_node_alloc+0x2a/0x70 net/core/dev.c:237
    [<000000003ca8f995>] netdev_name_node_head_alloc net/core/dev.c:251 [inline]
    [<000000003ca8f995>] register_netdevice+0xaf/0x650 net/core/dev.c:9239
    [<0000000080d0670e>] ip_tunnel_newlink+0xda/0x220 net/ipv4/ip_tunnel.c:1141
    [<00000000fd3a2ae5>] ipgre_newlink+0xa2/0xd0 net/ipv4/ip_gre.c:1299
    [<00000000d31f34c2>] __rtnl_newlink+0x89a/0xb80 net/core/rtnetlink.c:3303
    [<00000000a7b0a8c3>] rtnl_newlink+0x4e/0x80 net/core/rtnetlink.c:3361
    [<00000000a5120b6e>] rtnetlink_rcv_msg+0x178/0x4b0 net/core/rtnetlink.c:5422
    [<000000001186c73f>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<000000000106a045>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5440
    [<000000007cea528f>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<000000007cea528f>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328
    [<000000002070ff57>] netlink_sendmsg+0x29f/0x550 net/netlink/af_netlink.c:1917
    [<000000007b9b11a6>] sock_sendmsg_nosec net/socket.c:639 [inline]
    [<000000007b9b11a6>] sock_sendmsg+0x54/0x70 net/socket.c:659
    [<000000006a281aaf>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2330
    [<00000000d78148f4>] ___sys_sendmsg+0x9c/0x100 net/socket.c:2384
    [<00000000c2c47031>] __sys_sendmsg+0x80/0xf0 net/socket.c:2430