Kim/netfilter-ipvs-expire-no-destination-UDP-connections-when- expire_nodest_conn-1/20200515-093828 1/1] net/netfilter/ipvs/ip_vs_conn.c:1371:6: sparse: sparse: context imbalance in 'ip_vs_expire_n... tree: https://github.com/0day-ci/linux/commits/UPDATE-20200609- 013614/Andrew-Sy-Kim/netfilter-ipvs-expire-no-destination-UDP-connections- when-expire_nodest_conn-1/20200515-093828 head: f0365de6e00edf0b24c916b9e7ced5e468b101ce commit: f0365de6e00edf0b24c916b9e7ced5e468b101ce [1/1] netfilter/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: i386-randconfig-s002-20200608 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-247-gcadbd124-dirty git checkout f0365de6e00edf0b24c916b9e7ced5e468b101ce # save the attached .config to linux build tree make W=1 C=1 ARCH=i386 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) # https://github.com/0day- ci/linux/commit/f0365de6e00edf0b24c916b9e7ced5e468b101ce git remote add linux-review https://github.com/0day-ci/linux git remote update linux-review git checkout f0365de6e00edf0b24c916b9e7ced5e468b101ce vim +/ip_vs_expire_nodest_conn_flush +1371 net/netfilter/ipvs/ip_vs_conn.c f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1369 f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1370 #ifdef CONFIG_SYSCTL f0365de6e00edf0 Andrew Sy Kim 2020-06-08 @1371 void ip_vs_expire_nodest_conn_flush(struct netns_ipvs *ipvs) f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1372 { f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1373 int idx; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1374 struct ip_vs_conn *cp, *cp_c; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1375 struct ip_vs_dest *dest; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1376 f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1377 rcu_read_lock(); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1378 for (idx = 0; idx < ip_vs_conn_tab_size; idx++) { f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1379 hlist_for_each_entry_rcu(cp, &ip_vs_conn_tab[idx], c_list) { f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1380 if (cp- f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1381 continue; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1382 f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1383 dest = cp->dest; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1384 if (!dest || (dest->flags & IP_VS_DEST_F_AVAILABLE)) f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1385 continue; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1386 f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1387 /* As timers are expired in LIFO order, restart f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1388 * the timer of controlling connection first, so f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1389 * that it is expired after us. f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1390 */ f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1391 cp_c = cp->control; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1392 /* cp- f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1393 if (cp_c && __ip_vs_conn_get(cp)) { f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1394 IP_VS_DBG(4, "del controlling connection\n"); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1395 ip_vs_conn_expire_now(cp_c); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1396 __ip_vs_conn_put(cp); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1397 } f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1398 f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1399 IP_VS_DBG(4, "del connection\n"); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1400 ip_vs_conn_expire_now(cp); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1401 } f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1402 cond_resched_rcu(); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1403 f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1404 /* netns clean up started, aborted delayed work */ f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1405 if (!ipvs- f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1406 return; f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1407 } f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1408 rcu_read_unlock(); f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1409 } f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1410 #endif f0365de6e00edf0 Andrew Sy Kim 2020-06-08 1411 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org