On Thu, Jul 16, 2020 at 10:42:53PM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git master > head: 3354c27699652b271b78c85f275b818e6b9843e6 > commit: 04231e52d3557475231abe8a8fa1be0330826ed6 [2/3] ipvs: queue delayed work to expire no destination connections if expire_nodest_conn=1 > :::::: branch date: 5 hours ago > :::::: commit date: 5 hours ago > config: mips-randconfig-s032-20200715 (attached as .config) > compiler: mipsel-linux-gcc (GCC) 9.3.0 > reproduce: > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # apt-get install sparse > # sparse version: v0.6.2-49-g707c5017-dirty > git checkout 04231e52d3557475231abe8a8fa1be0330826ed6 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=mips > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > > sparse warnings: (new ones prefixed by >>) > > >> net/netfilter/ipvs/ip_vs_conn.c:1394:6: sparse: sparse: context imbalance in 'ip_vs_expire_nodest_conn_flush' - wrong count at exit > > # https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git/commit/?id=04231e52d3557475231abe8a8fa1be0330826ed6 > git remote add nf-next https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git > git remote update nf-next > git checkout 04231e52d3557475231abe8a8fa1be0330826ed6 > vim +/ip_vs_expire_nodest_conn_flush +1394 net/netfilter/ipvs/ip_vs_conn.c > > 04231e52d355747 Andrew Sy Kim 2020-07-08 1392 > 04231e52d355747 Andrew Sy Kim 2020-07-08 1393 #ifdef CONFIG_SYSCTL > 04231e52d355747 Andrew Sy Kim 2020-07-08 @1394 void ip_vs_expire_nodest_conn_flush(struct netns_ipvs *ipvs) > 04231e52d355747 Andrew Sy Kim 2020-07-08 1395 { > 04231e52d355747 Andrew Sy Kim 2020-07-08 1396 int idx; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1397 struct ip_vs_conn *cp, *cp_c; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1398 struct ip_vs_dest *dest; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1399 > 04231e52d355747 Andrew Sy Kim 2020-07-08 1400 rcu_read_lock(); > 04231e52d355747 Andrew Sy Kim 2020-07-08 1401 for (idx = 0; idx < ip_vs_conn_tab_size; idx++) { > 04231e52d355747 Andrew Sy Kim 2020-07-08 1402 hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[idx], c_list) { > 04231e52d355747 Andrew Sy Kim 2020-07-08 1403 if (cp->ipvs != ipvs) > 04231e52d355747 Andrew Sy Kim 2020-07-08 1404 continue; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1405 > 04231e52d355747 Andrew Sy Kim 2020-07-08 1406 dest = cp->dest; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1407 if (!dest || (dest->flags & IP_VS_DEST_F_AVAILABLE)) > 04231e52d355747 Andrew Sy Kim 2020-07-08 1408 continue; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1409 > 04231e52d355747 Andrew Sy Kim 2020-07-08 1410 if (atomic_read(&cp->n_control)) > 04231e52d355747 Andrew Sy Kim 2020-07-08 1411 continue; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1412 > 04231e52d355747 Andrew Sy Kim 2020-07-08 1413 cp_c = cp->control; > 04231e52d355747 Andrew Sy Kim 2020-07-08 1414 IP_VS_DBG(4, "del connection\n"); > 04231e52d355747 Andrew Sy Kim 2020-07-08 1415 ip_vs_conn_del(cp); > 04231e52d355747 Andrew Sy Kim 2020-07-08 1416 if (cp_c && !atomic_read(&cp_c->n_control)) { > 04231e52d355747 Andrew Sy Kim 2020-07-08 1417 IP_VS_DBG(4, "del controlling connection\n"); > 04231e52d355747 Andrew Sy Kim 2020-07-08 1418 ip_vs_conn_del(cp_c); > 04231e52d355747 Andrew Sy Kim 2020-07-08 1419 } > 04231e52d355747 Andrew Sy Kim 2020-07-08 1420 } > 04231e52d355747 Andrew Sy Kim 2020-07-08 1421 cond_resched_rcu(); > 04231e52d355747 Andrew Sy Kim 2020-07-08 1422 > 04231e52d355747 Andrew Sy Kim 2020-07-08 1423 /* netns clean up started, abort delayed work */ > 04231e52d355747 Andrew Sy Kim 2020-07-08 1424 if (!ipvs->enable) > 04231e52d355747 Andrew Sy Kim 2020-07-08 1425 return; Missing rcu_read_unlock() here ? > 04231e52d355747 Andrew Sy Kim 2020-07-08 1426 } > 04231e52d355747 Andrew Sy Kim 2020-07-08 1427 rcu_read_unlock(); > 04231e52d355747 Andrew Sy Kim 2020-07-08 1428 } > 04231e52d355747 Andrew Sy Kim 2020-07-08 1429 #endif > 04231e52d355747 Andrew Sy Kim 2020-07-08 1430 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
