tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 136057256686de39cc3a07c2e39ef6bc43003ff6 commit: 010b430d5df556d5d232e3751ac691ba9e88c041 mptcp: MPTCP_IPV6 should depend on IPV6 instead of selecting it date: 1 year, 1 month ago config: x86_64-randconfig-a004-20211122 (attached as .config) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 010b430d5df556d5d232e3751ac691ba9e88c041 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 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 >>): struct list_head *old_list6; ^ 1 warning generated. vim +/old_list6 +495 net/netlabel/netlabel_domainhash.c 63c41688743760 Paul Moore 2008-10-10 416 6b21e1b77d1a3d Paul Moore 2013-05-17 417 ret_val = netlbl_domhsh_validate(entry); 6b21e1b77d1a3d Paul Moore 2013-05-17 418 if (ret_val != 0) 6b21e1b77d1a3d Paul Moore 2013-05-17 419 return ret_val; 6b21e1b77d1a3d Paul Moore 2013-05-17 420 b914f3a2a35812 Paul Moore 2010-04-01 421 /* XXX - we can remove this RCU read lock as the spinlock protects the b914f3a2a35812 Paul Moore 2010-04-01 422 * entire function, but before we do we need to fixup the b914f3a2a35812 Paul Moore 2010-04-01 423 * netlbl_af[4,6]list RCU functions to do "the right thing" with b914f3a2a35812 Paul Moore 2010-04-01 424 * respect to rcu_dereference() when only a spinlock is held. */ 63c41688743760 Paul Moore 2008-10-10 425 rcu_read_lock(); 63c41688743760 Paul Moore 2008-10-10 426 spin_lock(&netlbl_domhsh_lock); 63c41688743760 Paul Moore 2008-10-10 427 if (entry->domain != NULL) 8f18e675c3335b Huw Davies 2016-06-27 428 entry_old = netlbl_domhsh_search(entry->domain, entry->family); 63c41688743760 Paul Moore 2008-10-10 429 else 8f18e675c3335b Huw Davies 2016-06-27 430 entry_old = netlbl_domhsh_search_def(entry->domain, 8f18e675c3335b Huw Davies 2016-06-27 431 entry->family); 63c41688743760 Paul Moore 2008-10-10 432 if (entry_old == NULL) { d15c345fe3b8df Paul Moore 2006-08-03 433 entry->valid = 1; d15c345fe3b8df Paul Moore 2006-08-03 434 d15c345fe3b8df Paul Moore 2006-08-03 435 if (entry->domain != NULL) { 63c41688743760 Paul Moore 2008-10-10 436 u32 bkt = netlbl_domhsh_hash(entry->domain); d15c345fe3b8df Paul Moore 2006-08-03 437 list_add_tail_rcu(&entry->list, 3482fd9099e8aa Paul Moore 2007-08-07 438 &rcu_dereference(netlbl_domhsh)->tbl[bkt]); 4be2700fb7b95f Paul Moore 2007-10-26 439 } else { d15c345fe3b8df Paul Moore 2006-08-03 440 INIT_LIST_HEAD(&entry->list); 8f18e675c3335b Huw Davies 2016-06-27 441 switch (entry->family) { 8f18e675c3335b Huw Davies 2016-06-27 442 case AF_INET: 8f18e675c3335b Huw Davies 2016-06-27 443 rcu_assign_pointer(netlbl_domhsh_def_ipv4, 8f18e675c3335b Huw Davies 2016-06-27 444 entry); 8f18e675c3335b Huw Davies 2016-06-27 445 break; 8f18e675c3335b Huw Davies 2016-06-27 446 case AF_INET6: 8f18e675c3335b Huw Davies 2016-06-27 447 rcu_assign_pointer(netlbl_domhsh_def_ipv6, 8f18e675c3335b Huw Davies 2016-06-27 448 entry); 8f18e675c3335b Huw Davies 2016-06-27 449 break; 8f18e675c3335b Huw Davies 2016-06-27 450 case AF_UNSPEC: 8f18e675c3335b Huw Davies 2016-06-27 451 if (entry->def.type != 8f18e675c3335b Huw Davies 2016-06-27 452 NETLBL_NLTYPE_UNLABELED) { 8f18e675c3335b Huw Davies 2016-06-27 453 ret_val = -EINVAL; 8f18e675c3335b Huw Davies 2016-06-27 454 goto add_return; 8f18e675c3335b Huw Davies 2016-06-27 455 } 8f18e675c3335b Huw Davies 2016-06-27 456 entry_b = kzalloc(sizeof(*entry_b), GFP_ATOMIC); 8f18e675c3335b Huw Davies 2016-06-27 457 if (entry_b == NULL) { 8f18e675c3335b Huw Davies 2016-06-27 458 ret_val = -ENOMEM; 8f18e675c3335b Huw Davies 2016-06-27 459 goto add_return; 8f18e675c3335b Huw Davies 2016-06-27 460 } 8f18e675c3335b Huw Davies 2016-06-27 461 entry_b->family = AF_INET6; 8f18e675c3335b Huw Davies 2016-06-27 462 entry_b->def.type = NETLBL_NLTYPE_UNLABELED; 8f18e675c3335b Huw Davies 2016-06-27 463 entry_b->valid = 1; 8f18e675c3335b Huw Davies 2016-06-27 464 entry->family = AF_INET; 8f18e675c3335b Huw Davies 2016-06-27 465 rcu_assign_pointer(netlbl_domhsh_def_ipv4, 8f18e675c3335b Huw Davies 2016-06-27 466 entry); 8f18e675c3335b Huw Davies 2016-06-27 467 rcu_assign_pointer(netlbl_domhsh_def_ipv6, 8f18e675c3335b Huw Davies 2016-06-27 468 entry_b); 8f18e675c3335b Huw Davies 2016-06-27 469 break; 8f18e675c3335b Huw Davies 2016-06-27 470 default: 8f18e675c3335b Huw Davies 2016-06-27 471 /* Already checked in 8f18e675c3335b Huw Davies 2016-06-27 472 * netlbl_domhsh_validate(). */ 8f18e675c3335b Huw Davies 2016-06-27 473 ret_val = -EINVAL; 8f18e675c3335b Huw Davies 2016-06-27 474 goto add_return; 8f18e675c3335b Huw Davies 2016-06-27 475 } 63c41688743760 Paul Moore 2008-10-10 476 } 63c41688743760 Paul Moore 2008-10-10 477 6a8b7f0c85f1f4 Paul Moore 2013-08-02 478 if (entry->def.type == NETLBL_NLTYPE_ADDRSELECT) { 63c41688743760 Paul Moore 2008-10-10 479 netlbl_af4list_foreach_rcu(iter4, 6a8b7f0c85f1f4 Paul Moore 2013-08-02 480 &entry->def.addrsel->list4) 63c41688743760 Paul Moore 2008-10-10 481 netlbl_domhsh_audit_add(entry, iter4, NULL, 63c41688743760 Paul Moore 2008-10-10 482 ret_val, audit_info); dfd56b8b38fff3 Eric Dumazet 2011-12-10 483 #if IS_ENABLED(CONFIG_IPV6) 63c41688743760 Paul Moore 2008-10-10 484 netlbl_af6list_foreach_rcu(iter6, 6a8b7f0c85f1f4 Paul Moore 2013-08-02 485 &entry->def.addrsel->list6) 63c41688743760 Paul Moore 2008-10-10 486 netlbl_domhsh_audit_add(entry, NULL, iter6, 63c41688743760 Paul Moore 2008-10-10 487 ret_val, audit_info); 63c41688743760 Paul Moore 2008-10-10 488 #endif /* IPv6 */ 63c41688743760 Paul Moore 2008-10-10 489 } else 63c41688743760 Paul Moore 2008-10-10 490 netlbl_domhsh_audit_add(entry, NULL, NULL, 63c41688743760 Paul Moore 2008-10-10 491 ret_val, audit_info); 6a8b7f0c85f1f4 Paul Moore 2013-08-02 492 } else if (entry_old->def.type == NETLBL_NLTYPE_ADDRSELECT && 6a8b7f0c85f1f4 Paul Moore 2013-08-02 493 entry->def.type == NETLBL_NLTYPE_ADDRSELECT) { 63c41688743760 Paul Moore 2008-10-10 494 struct list_head *old_list4; 63c41688743760 Paul Moore 2008-10-10 @495 struct list_head *old_list6; 63c41688743760 Paul Moore 2008-10-10 496 6a8b7f0c85f1f4 Paul Moore 2013-08-02 497 old_list4 = &entry_old->def.addrsel->list4; 6a8b7f0c85f1f4 Paul Moore 2013-08-02 498 old_list6 = &entry_old->def.addrsel->list6; 63c41688743760 Paul Moore 2008-10-10 499 63c41688743760 Paul Moore 2008-10-10 500 /* we only allow the addition of address selectors if all of 63c41688743760 Paul Moore 2008-10-10 501 * the selectors do not exist in the existing domain map */ 6a8b7f0c85f1f4 Paul Moore 2013-08-02 502 netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) 63c41688743760 Paul Moore 2008-10-10 503 if (netlbl_af4list_search_exact(iter4->addr, 63c41688743760 Paul Moore 2008-10-10 504 iter4->mask, 63c41688743760 Paul Moore 2008-10-10 505 old_list4)) { d15c345fe3b8df Paul Moore 2006-08-03 506 ret_val = -EEXIST; 63c41688743760 Paul Moore 2008-10-10 507 goto add_return; 4be2700fb7b95f Paul Moore 2007-10-26 508 } dfd56b8b38fff3 Eric Dumazet 2011-12-10 509 #if IS_ENABLED(CONFIG_IPV6) 6a8b7f0c85f1f4 Paul Moore 2013-08-02 510 netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) 63c41688743760 Paul Moore 2008-10-10 511 if (netlbl_af6list_search_exact(&iter6->addr, 63c41688743760 Paul Moore 2008-10-10 512 &iter6->mask, 63c41688743760 Paul Moore 2008-10-10 513 old_list6)) { 63c41688743760 Paul Moore 2008-10-10 514 ret_val = -EEXIST; 63c41688743760 Paul Moore 2008-10-10 515 goto add_return; 32f50cdee66633 Paul Moore 2006-09-28 516 } 63c41688743760 Paul Moore 2008-10-10 517 #endif /* IPv6 */ 63c41688743760 Paul Moore 2008-10-10 518 63c41688743760 Paul Moore 2008-10-10 519 netlbl_af4list_foreach_safe(iter4, tmp4, 6a8b7f0c85f1f4 Paul Moore 2013-08-02 520 &entry->def.addrsel->list4) { 63c41688743760 Paul Moore 2008-10-10 521 netlbl_af4list_remove_entry(iter4); 63c41688743760 Paul Moore 2008-10-10 522 iter4->valid = 1; 63c41688743760 Paul Moore 2008-10-10 523 ret_val = netlbl_af4list_add(iter4, old_list4); 63c41688743760 Paul Moore 2008-10-10 524 netlbl_domhsh_audit_add(entry_old, iter4, NULL, 63c41688743760 Paul Moore 2008-10-10 525 ret_val, audit_info); 63c41688743760 Paul Moore 2008-10-10 526 if (ret_val != 0) 63c41688743760 Paul Moore 2008-10-10 527 goto add_return; de64688ffb952a Paul Moore 2006-11-17 528 } dfd56b8b38fff3 Eric Dumazet 2011-12-10 529 #if IS_ENABLED(CONFIG_IPV6) 63c41688743760 Paul Moore 2008-10-10 530 netlbl_af6list_foreach_safe(iter6, tmp6, 6a8b7f0c85f1f4 Paul Moore 2013-08-02 531 &entry->def.addrsel->list6) { 63c41688743760 Paul Moore 2008-10-10 532 netlbl_af6list_remove_entry(iter6); 63c41688743760 Paul Moore 2008-10-10 533 iter6->valid = 1; 63c41688743760 Paul Moore 2008-10-10 534 ret_val = netlbl_af6list_add(iter6, old_list6); 63c41688743760 Paul Moore 2008-10-10 535 netlbl_domhsh_audit_add(entry_old, NULL, iter6, 63c41688743760 Paul Moore 2008-10-10 536 ret_val, audit_info); 63c41688743760 Paul Moore 2008-10-10 537 if (ret_val != 0) 63c41688743760 Paul Moore 2008-10-10 538 goto add_return; 63c41688743760 Paul Moore 2008-10-10 539 } 63c41688743760 Paul Moore 2008-10-10 540 #endif /* IPv6 */ d3b990b7f327e2 Paul Moore 2020-08-21 541 /* cleanup the new entry since we've moved everything over */ d3b990b7f327e2 Paul Moore 2020-08-21 542 netlbl_domhsh_free_entry(&entry->rcu); 63c41688743760 Paul Moore 2008-10-10 543 } else 63c41688743760 Paul Moore 2008-10-10 544 ret_val = -EINVAL; d15c345fe3b8df Paul Moore 2006-08-03 545 63c41688743760 Paul Moore 2008-10-10 546 add_return: 63c41688743760 Paul Moore 2008-10-10 547 spin_unlock(&netlbl_domhsh_lock); 63c41688743760 Paul Moore 2008-10-10 548 rcu_read_unlock(); d15c345fe3b8df Paul Moore 2006-08-03 549 return ret_val; d15c345fe3b8df Paul Moore 2006-08-03 550 } d15c345fe3b8df Paul Moore 2006-08-03 551 :::::: The code at line 495 was first introduced by commit :::::: 63c41688743760631188cf0f4ae986a6793ccb0a netlabel: Add network address selectors to the NetLabel/LSM domain mapping :::::: TO: Paul Moore <paul.moore(a)hp.com&gt; :::::: CC: Paul Moore <paul.moore(a)hp.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org