netdev - Re: [PATCH v7 08/22] net/tcp: Add AO sign to RST packets

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Message-ID: <202306150911.gIaFpxg9-lkp@intel.com>
Date: Thu, 15 Jun 2023 09:22:57 +0800
From: kernel test robot <lkp@...el.com>
To: Dmitry Safonov <dima@...sta.com>, David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Jakub Kicinski <kuba@...nel.org>,
	"David S. Miller" <davem@...emloft.net>
Cc: oe-kbuild-all@...ts.linux.dev, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Dmitry Safonov <dima@...sta.com>,
	Andy Lutomirski <luto@...capital.net>,
	Ard Biesheuvel <ardb@...nel.org>,
	Bob Gilligan <gilligan@...sta.com>,
	Dan Carpenter <error27@...il.com>,
	David Laight <David.Laight@...lab.com>,
	Donald Cassidy <dcassidy@...hat.com>,
	Eric Biggers <ebiggers@...nel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Francesco Ruggeri <fruggeri05@...il.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Ivan Delalande <colona@...sta.com>,
	Leonard Crestez <cdleonard@...il.com>,
	Salam Noureddine <noureddine@...sta.com>
Subject: Re: [PATCH v7 08/22] net/tcp: Add AO sign to RST packets

Hi Dmitry,

kernel test robot noticed the following build warnings:

[auto build test WARNING on b6dad5178ceaf23f369c3711062ce1f2afc33644]

url:    https://github.com/intel-lab-lkp/linux/commits/Dmitry-Safonov/net-tcp-Prepare-tcp_md5sig_pool-for-TCP-AO/20230615-071334
base:   b6dad5178ceaf23f369c3711062ce1f2afc33644
patch link:    https://lore.kernel.org/r/20230614230947.3954084-9-dima%40arista.com
patch subject: [PATCH v7 08/22] net/tcp: Add AO sign to RST packets
config: i386-randconfig-r021-20230612 (https://download.01.org/0day-ci/archive/20230615/202306150911.gIaFpxg9-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build):
        git checkout b6dad5178ceaf23f369c3711062ce1f2afc33644
        b4 shazam https://lore.kernel.org/r/20230614230947.3954084-9-dima@arista.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/ipv6/

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306150911.gIaFpxg9-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/ipv6/tcp_ipv6.c: In function 'tcp_v6_send_reset':
>> net/ipv6/tcp_ipv6.c:1136:1: warning: label 'out' defined but not used [-Wunused-label]
    1136 | out:
         | ^~~


vim +/out +1136 net/ipv6/tcp_ipv6.c

2045a93527d963 Dmitry Safonov           2023-06-15  1110  
c24b14c46bb88d Song Liu                 2017-10-23  1111  	if (sk) {
c24b14c46bb88d Song Liu                 2017-10-23  1112  		oif = sk->sk_bound_dev_if;
052e0690f1f62f Eric Dumazet             2019-07-10  1113  		if (sk_fullsock(sk)) {
052e0690f1f62f Eric Dumazet             2019-07-10  1114  			const struct ipv6_pinfo *np = tcp_inet6_sk(sk);
052e0690f1f62f Eric Dumazet             2019-07-10  1115  
c24b14c46bb88d Song Liu                 2017-10-23  1116  			trace_tcp_send_reset(sk, skb);
052e0690f1f62f Eric Dumazet             2019-07-10  1117  			if (np->repflow)
052e0690f1f62f Eric Dumazet             2019-07-10  1118  				label = ip6_flowlabel(ipv6h);
e9a5dceee56cb5 Eric Dumazet             2019-09-24  1119  			priority = sk->sk_priority;
dc6456e938e938 Antoine Tenart           2023-04-27  1120  			txhash = sk->sk_txhash;
052e0690f1f62f Eric Dumazet             2019-07-10  1121  		}
f6c0f5d209fa80 Eric Dumazet             2019-09-24  1122  		if (sk->sk_state == TCP_TIME_WAIT) {
50a8accf10627b Eric Dumazet             2019-06-05  1123  			label = cpu_to_be32(inet_twsk(sk)->tw_flowlabel);
f6c0f5d209fa80 Eric Dumazet             2019-09-24  1124  			priority = inet_twsk(sk)->tw_priority;
9258b8b1be2e1e Eric Dumazet             2022-09-22  1125  			txhash = inet_twsk(sk)->tw_txhash;
f6c0f5d209fa80 Eric Dumazet             2019-09-24  1126  		}
323a53c41292a0 Eric Dumazet             2019-06-05  1127  	} else {
a346abe051bd2b Eric Dumazet             2019-07-01  1128  		if (net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_TCP_RESET)
323a53c41292a0 Eric Dumazet             2019-06-05  1129  			label = ip6_flowlabel(ipv6h);
c24b14c46bb88d Song Liu                 2017-10-23  1130  	}
c24b14c46bb88d Song Liu                 2017-10-23  1131  
e92dd77e6fe0a3 Wei Wang                 2020-09-08  1132  	tcp_v6_send_response(sk, skb, seq, ack_seq, 0, 0, 0, oif, key, 1,
2045a93527d963 Dmitry Safonov           2023-06-15  1133  			     ipv6_get_dsfield(ipv6h), label, priority, txhash,
2045a93527d963 Dmitry Safonov           2023-06-15  1134  			     ao_key, traffic_key, rcv_next, ao_sne);
658ddaaf6694ad Shawn Lu                 2012-01-31  1135  
3b24d854cb3538 Eric Dumazet             2016-04-01 @1136  out:
658ddaaf6694ad Shawn Lu                 2012-01-31  1137  	rcu_read_unlock();
ecc51b6d5ca04b Arnaldo Carvalho de Melo 2005-12-12  1138  }
^1da177e4c3f41 Linus Torvalds           2005-04-16  1139  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki