--- zzzz-none-000/linux-4.4.60/include/uapi/linux/ip.h 2017-04-08 07:53:53.000000000 +0000 +++ jet-2400-727/linux-4.4.60/include/uapi/linux/ip.h 2021-03-17 14:36:41.000000000 +0000 @@ -102,7 +102,7 @@ __be32 saddr; __be32 daddr; /*The options start here. */ -}; +} __attribute__((packed, aligned(2))); struct ip_auth_hdr {