BUG: memory leak
unreferenced object 0xffff88810a151f40 (size 64):
  comm "syz-executor.0", pid 11981, jiffies 4295139166 (age 10.570s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    50 1f 15 0a 81 88 ff ff 50 1f 15 0a 81 88 ff ff  P.......P.......
  backtrace:
    [<00000000132f0353>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000132f0353>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000132f0353>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000132f0353>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<00000000d693f4ad>] kmalloc include/linux/slab.h:556 [inline]
    [<00000000d693f4ad>] netdev_name_node_alloc+0x2a/0x70 net/core/dev.c:237
    [<00000000df473ca2>] netdev_name_node_head_alloc net/core/dev.c:251 [inline]
    [<00000000df473ca2>] register_netdevice+0xaf/0x650 net/core/dev.c:9239
    [<00000000b622f270>] __ip_tunnel_create+0x162/0x2f0 net/ipv4/ip_tunnel.c:269
    [<00000000e4bbf459>] ip_tunnel_init_net+0x18d/0x280 net/ipv4/ip_tunnel.c:1060
    [<00000000342b6c2d>] erspan_init_net+0x2a/0x30 net/ipv4/ip_gre.c:1594
    [<000000009c0711d2>] ops_init+0x4c/0x160 net/core/net_namespace.c:137
    [<00000000c0a39675>] setup_net+0xda/0x2a0 net/core/net_namespace.c:335
    [<0000000066c3d9a0>] copy_net_ns+0x128/0x2b0 net/core/net_namespace.c:476
    [<000000004e0d8300>] create_new_namespaces+0x141/0x310 kernel/nsproxy.c:103
    [<000000001b762124>] unshare_nsproxy_namespaces+0x7f/0x100 kernel/nsproxy.c:202
    [<00000000603d72c8>] ksys_unshare+0x237/0x490 kernel/fork.c:2932
    [<00000000c3270eb3>] __do_sys_unshare kernel/fork.c:3000 [inline]
    [<00000000c3270eb3>] __se_sys_unshare kernel/fork.c:2998 [inline]
    [<00000000c3270eb3>] __x64_sys_unshare+0x16/0x20 kernel/fork.c:2998
    [<00000000178c3d4a>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<00000000ced45550>] entry_SYSCALL_64_after_hwframe+0x44/0xa9