BUG: memory leak
unreferenced object 0xffff88811d6fb4c0 (size 32):
  comm "syz-executor089", pid 7047, jiffies 4294943954 (age 8.100s)
  hex dump (first 32 bytes):
    aa aa aa aa aa aa 00 73 6b 2f 37 30 34 37 00 70  .......sk/7047.p
    65 3a 5b 32 36 34 39 37 5d 00 00 00 00 00 00 00  e:[26497].......
  backtrace:
    [<00000000c31eaa25>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000c31eaa25>] slab_post_alloc_hook mm/slab.h:522 [inline]
    [<00000000c31eaa25>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000c31eaa25>] __do_kmalloc mm/slab.c:3653 [inline]
    [<00000000c31eaa25>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3670
    [<000000007e4e177f>] kstrdup+0x3a/0x70 mm/util.c:53
    [<00000000878f72b7>] kstrdup_const+0x48/0x60 mm/util.c:75
    [<0000000076ec5016>] kvasprintf_const+0x7e/0xe0 lib/kasprintf.c:48
    [<00000000b26c6f10>] kobject_set_name_vargs+0x40/0xe0 lib/kobject.c:289
    [<000000009e5e0bc6>] dev_set_name+0x63/0x90 drivers/base/core.c:1918
    [<00000000418678d3>] netdev_register_kobject+0x5a/0x1b0 net/core/net-sysfs.c:1727
    [<00000000b9cbf8de>] register_netdevice+0x397/0x600 net/core/dev.c:8723
    [<00000000c2757042>] ip6gre_newlink_common.isra.0+0x73/0x150 net/ipv6/ip6_gre.c:1958
    [<00000000c6774891>] ip6gre_newlink+0x8c/0x150 net/ipv6/ip6_gre.c:1991
    [<000000000f2c8d46>] __rtnl_newlink+0x892/0xb30 net/core/rtnetlink.c:3196
    [<00000000bcfc01a8>] rtnl_newlink+0x4e/0x80 net/core/rtnetlink.c:3254
    [<0000000073d7145e>] rtnetlink_rcv_msg+0x178/0x4b0 net/core/rtnetlink.c:5223
    [<00000000f6883ac5>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<0000000017f5a691>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241
    [<000000004fe2dc75>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<000000004fe2dc75>] netlink_unicast+0x1ec/0x2d0 net/netlink/af_netlink.c:1328