Hi Leonard, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on 1fe5b01262844be03de98afdd56d1d393df04d7e] url: https://github.com/0day-ci/linux/commits/Leonard-Crestez/tcp-Initial-supp... base: 1fe5b01262844be03de98afdd56d1d393df04d7e config: openrisc-randconfig-r014-20211208 (https://download.01.org/0day-ci/archive/20211209/202112090745.LdVOpiG4-lk...) compiler: or1k-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/8d4bf3a9b770cb44bf4e37e794e63f7db... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Leonard-Crestez/tcp-Initial-support-for-RFC5925-auth-option/20211208-194125 git checkout 8d4bf3a9b770cb44bf4e37e794e63f7db7a08cb6 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=openrisc SHELL=/bin/bash net/ipv4/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): net/ipv4/tcp_ipv4.c: In function 'tcp_v4_send_ack': 909 | struct tcp_md5sig_key *key, | ~~~~~~~~~~~~~~~~~~~~~~~^~~ vim +/key +909 net/ipv4/tcp_ipv4.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 901 ^1da177e4c3f41 Linus Torvalds 2005-04-16 902 /* The code following below sending ACKs in SYN-RECV and TIME-WAIT states ^1da177e4c3f41 Linus Torvalds 2005-04-16 903 outside socket context is ugly, certainly. What can I do? ^1da177e4c3f41 Linus Torvalds 2005-04-16 904 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 905 e2d118a1cb5e60 Lorenzo Colitti 2016-11-04 906 static void tcp_v4_send_ack(const struct sock *sk, e62a123b8ef7c5 Eric Dumazet 2016-01-21 907 struct sk_buff *skb, u32 seq, u32 ack, ee684b6f283004 Andrey Vagin 2013-02-11 908 u32 win, u32 tsval, u32 tsecr, int oif, 88ef4a5a78e634 KOVACS Krisztian 2008-10-01 @909 struct tcp_md5sig_key *key, 66b13d99d96a1a Eric Dumazet 2011-10-24 910 int reply_flags, u8 tos) ^1da177e4c3f41 Linus Torvalds 2005-04-16 911 { cf533ea53ebfae Eric Dumazet 2011-10-21 912 const struct tcphdr *th = tcp_hdr(skb); ^1da177e4c3f41 Linus Torvalds 2005-04-16 913 struct { ^1da177e4c3f41 Linus Torvalds 2005-04-16 914 struct tcphdr th; 714e85be355722 Al Viro 2006-11-14 915 __be32 opt[(TCPOLEN_TSTAMP_ALIGNED >> 2) cfb6eeb4c86059 YOSHIFUJI Hideaki 2006-11-14 916 #ifdef CONFIG_TCP_MD5SIG cfb6eeb4c86059 YOSHIFUJI Hideaki 2006-11-14 917 + (TCPOLEN_MD5SIG_ALIGNED >> 2) 8d4bf3a9b770cb Leonard Crestez 2021-12-08 918 #elif defined(CONFIG_TCP_AUTHOPT) 8d4bf3a9b770cb Leonard Crestez 2021-12-08 919 + (TCPOLEN_AUTHOPT_OUTPUT >> 2) cfb6eeb4c86059 YOSHIFUJI Hideaki 2006-11-14 920 #endif cfb6eeb4c86059 YOSHIFUJI Hideaki 2006-11-14 921 ]; ^1da177e4c3f41 Linus Torvalds 2005-04-16 922 } rep; e2d118a1cb5e60 Lorenzo Colitti 2016-11-04 923 struct net *net = sock_net(sk); ^1da177e4c3f41 Linus Torvalds 2005-04-16 924 struct ip_reply_arg arg; 00483690552c5f Jon Maxwell 2018-05-10 925 struct sock *ctl_sk; d6fb396cfaa71a Eric Dumazet 2019-06-13 926 u64 transmit_time; ^1da177e4c3f41 Linus Torvalds 2005-04-16 927 ^1da177e4c3f41 Linus Torvalds 2005-04-16 928 memset(&rep.th, 0, sizeof(struct tcphdr)); 7174259e6ced15 Arnaldo Carvalho de Melo 2006-11-17 929 memset(&arg, 0, sizeof(arg)); ^1da177e4c3f41 Linus Torvalds 2005-04-16 930 ^1da177e4c3f41 Linus Torvalds 2005-04-16 931 arg.iov[0].iov_base = (unsigned char *)&rep; ^1da177e4c3f41 Linus Torvalds 2005-04-16 932 arg.iov[0].iov_len = sizeof(rep.th); ee684b6f283004 Andrey Vagin 2013-02-11 933 if (tsecr) { cfb6eeb4c86059 YOSHIFUJI Hideaki 2006-11-14 934 rep.opt[0] = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | ^1da177e4c3f41 Linus Torvalds 2005-04-16 935 (TCPOPT_TIMESTAMP << 8) | ^1da177e4c3f41 Linus Torvalds 2005-04-16 936 TCPOLEN_TIMESTAMP); ee684b6f283004 Andrey Vagin 2013-02-11 937 rep.opt[1] = htonl(tsval); ee684b6f283004 Andrey Vagin 2013-02-11 938 rep.opt[2] = htonl(tsecr); cb48cfe8079ddd Craig Schlenter 2007-01-09 939 arg.iov[0].iov_len += TCPOLEN_TSTAMP_ALIGNED; ^1da177e4c3f41 Linus Torvalds 2005-04-16 940 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 941 ^1da177e4c3f41 Linus Torvalds 2005-04-16 942 /* Swap the send and the receive. */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 943 rep.th.dest = th->source; ^1da177e4c3f41 Linus Torvalds 2005-04-16 944 rep.th.source = th->dest; ^1da177e4c3f41 Linus Torvalds 2005-04-16 945 rep.th.doff = arg.iov[0].iov_len / 4; ^1da177e4c3f41 Linus Torvalds 2005-04-16 946 rep.th.seq = htonl(seq); ^1da177e4c3f41 Linus Torvalds 2005-04-16 947 rep.th.ack_seq = htonl(ack); ^1da177e4c3f41 Linus Torvalds 2005-04-16 948 rep.th.ack = 1; ^1da177e4c3f41 Linus Torvalds 2005-04-16 949 rep.th.window = htons(win); ^1da177e4c3f41 Linus Torvalds 2005-04-16 950 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org