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Message-ID: <db2f0650-6e23-457f-bc5c-f9da0047f37d@suswa.mountain>
Date: Thu, 7 Dec 2023 08:33:30 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: oe-kbuild@...ts.linux.dev, Lev Pantiukhin <kndrvt@...dex-team.ru>
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
mitradir@...dex-team.ru, Lev Pantiukhin <kndrvt@...dex-team.ru>,
Simon Horman <horms@...ge.net.au>,
Julian Anastasov <ja@....bg>, David Ahern <dsahern@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Pablo Neira Ayuso <pablo@...filter.org>,
Jozsef Kadlecsik <kadlec@...filter.org>,
Florian Westphal <fw@...len.de>, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, lvs-devel@...r.kernel.org,
netfilter-devel@...r.kernel.org, coreteam@...filter.org
Subject: Re: [PATCH] ipvs: add a stateless type of service and a stateless
Maglev hashing scheduler
Hi Lev,
kernel test robot noticed the following build warnings:
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Lev-Pantiukhin/ipvs-add-a-stateless-type-of-service-and-a-stateless-Maglev-hashing-scheduler/20231204-232344
base: https://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs-next.git master
patch link: https://lore.kernel.org/r/20231204152020.472247-1-kndrvt%40yandex-team.ru
patch subject: [PATCH] ipvs: add a stateless type of service and a stateless Maglev hashing scheduler
config: i386-randconfig-141-20231207 (https://download.01.org/0day-ci/archive/20231207/202312070849.i9gwwSH0-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce: (https://download.01.org/0day-ci/archive/20231207/202312070849.i9gwwSH0-lkp@intel.com/reproduce)
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>
| Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
| Closes: https://lore.kernel.org/r/202312070849.i9gwwSH0-lkp@intel.com/
New smatch warnings:
net/netfilter/ipvs/ip_vs_core.c:545 ip_vs_schedule() error: uninitialized symbol 'need_state'.
vim +/need_state +545 net/netfilter/ipvs/ip_vs_core.c
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 440 struct ip_vs_conn *
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 441 ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
d4383f04d145cc net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 442 struct ip_vs_proto_data *pd, int *ignored,
d4383f04d145cc net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 443 struct ip_vs_iphdr *iph)
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 444 {
9330419d9aa4f9 net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2011-01-03 445 struct ip_vs_protocol *pp = pd->pp;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 446 struct ip_vs_conn *cp = NULL;
ceec4c38168184 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2013-03-22 447 struct ip_vs_scheduler *sched;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 448 struct ip_vs_dest *dest;
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 449 __be16 _ports[2], *pptr, cport, vport;
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 450 const void *caddr, *vaddr;
3575792e005dc9 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-09-17 451 unsigned int flags;
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 452 bool need_state;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 453
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 454 *ignored = 1;
2f74713d1436b7 net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 455 /*
2f74713d1436b7 net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 456 * IPv6 frags, only the first hit here.
2f74713d1436b7 net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 457 */
6b3d933000cbe5 net/netfilter/ipvs/ip_vs_core.c Gao Feng 2017-11-13 458 pptr = frag_safe_skb_hp(skb, iph->len, sizeof(_ports), _ports);
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 459 if (pptr == NULL)
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 460 return NULL;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 461
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 462 if (likely(!ip_vs_iph_inverse(iph))) {
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 463 cport = pptr[0];
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 464 caddr = &iph->saddr;
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 465 vport = pptr[1];
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 466 vaddr = &iph->daddr;
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 467 } else {
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 468 cport = pptr[1];
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 469 caddr = &iph->daddr;
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 470 vport = pptr[0];
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 471 vaddr = &iph->saddr;
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 472 }
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 473
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 474 /*
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 475 * FTPDATA needs this check when using local real server.
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 476 * Never schedule Active FTPDATA connections from real server.
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 477 * For LVS-NAT they must be already created. For other methods
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 478 * with persistence the connection is created on SYN+ACK.
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 479 */
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 480 if (cport == FTPDATA) {
b0e010c527de74 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 481 IP_VS_DBG_PKT(12, svc->af, pp, skb, iph->off,
0d79641a96d612 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 482 "Not scheduling FTPDATA");
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 483 return NULL;
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 484 }
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 485
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 486 /*
a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 487 * Do not schedule replies from local real server.
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 488 */
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 489 if ((!skb->dev || skb->dev->flags & IFF_LOOPBACK)) {
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 490 iph->hdr_flags ^= IP_VS_HDR_INVERSE;
6ecd754883daff net/netfilter/ipvs/ip_vs_core.c Matteo Croce 2019-01-19 491 cp = INDIRECT_CALL_1(pp->conn_in_get,
6ecd754883daff net/netfilter/ipvs/ip_vs_core.c Matteo Croce 2019-01-19 492 ip_vs_conn_in_get_proto, svc->ipvs,
6ecd754883daff net/netfilter/ipvs/ip_vs_core.c Matteo Croce 2019-01-19 493 svc->af, skb, iph);
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 494 iph->hdr_flags ^= IP_VS_HDR_INVERSE;
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 495
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 496 if (cp) {
b0e010c527de74 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 497 IP_VS_DBG_PKT(12, svc->af, pp, skb, iph->off,
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 498 "Not scheduling reply for existing"
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 499 " connection");
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 500 __ip_vs_conn_put(cp);
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 501 return NULL;
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 502 }
802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 503 }
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 504
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 505 /*
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 506 * Persistent service
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 507 */
a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 508 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 509 return ip_vs_sched_persist(svc, skb, cport, vport, ignored,
d4383f04d145cc net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 510 iph);
a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 511
190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 512 *ignored = 0;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 513
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 514 /*
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 515 * Non-persistent service
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 516 */
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 517 if (!svc->fwmark && vport != svc->port) {
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 518 if (!svc->port)
1e3e238e9c4bf9 net/netfilter/ipvs/ip_vs_core.c Hannes Eder 2009-08-02 519 pr_err("Schedule: port zero only supported "
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 520 "in persistent services, "
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 521 "check your ipvs configuration\n");
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 522 return NULL;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 523 }
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 524
ceec4c38168184 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2013-03-22 525 sched = rcu_dereference(svc->scheduler);
05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 526 if (sched) {
05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 527 /* read svc->sched_data after svc->scheduler */
05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 528 smp_rmb();
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 529 /* we use distinct handler for stateless service */
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 530 if (svc->flags & IP_VS_SVC_F_STATELESS)
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 531 dest = sched->schedule_sl(svc, skb, iph, &need_state);
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 532 else
bba54de5bdd107 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2013-06-16 533 dest = sched->schedule(svc, skb, iph);
need_state not initialized on this path
05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 534 } else {
05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 535 dest = NULL;
05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 536 }
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 537 if (dest == NULL) {
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 538 IP_VS_DBG(1, "Schedule: no dest found.\n");
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 539 return NULL;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 540 }
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 541
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 542 /* We use IP_VS_SVC_F_ONEPACKET flag to create no state */
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 543 flags = ((svc->flags & IP_VS_SVC_F_ONEPACKET &&
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 544 iph->protocol == IPPROTO_UDP) ||
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 @545 (svc->flags & IP_VS_SVC_F_STATELESS && !need_state))
^^^^^^^^^^
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 546 ? IP_VS_CONN_F_ONE_PACKET : 0;
26ec037f9841e4 net/netfilter/ipvs/ip_vs_core.c Nick Chalk 2010-06-22 547
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 548 /*
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 549 * Create a connection entry.
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 550 */
f11017ec2d1859 net/netfilter/ipvs/ip_vs_core.c Simon Horman 2010-08-22 551 {
f11017ec2d1859 net/netfilter/ipvs/ip_vs_core.c Simon Horman 2010-08-22 552 struct ip_vs_conn_param p;
6e67e586e7289c net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2011-01-03 553
3109d2f2d1fe06 net/netfilter/ipvs/ip_vs_core.c Eric W. Biederman 2015-09-21 554 ip_vs_conn_fill_param(svc->ipvs, svc->af, iph->protocol,
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 555 caddr, cport, vaddr, vport, &p);
ba38528aae6ee2 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2014-09-09 556 cp = ip_vs_conn_new(&p, dest->af, &dest->addr,
ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 557 dest->port ? dest->port : vport,
0e051e683ba4ac net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 558 flags, dest, skb->mark);
a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 559 if (!cp) {
a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 560 *ignored = -1;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 561 return NULL;
f11017ec2d1859 net/netfilter/ipvs/ip_vs_core.c Simon Horman 2010-08-22 562 }
a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 563 }
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 564
cd17f9ed099ed2 net/ipv4/ipvs/ip_vs_core.c Julius Volz 2008-09-02 565 IP_VS_DBG_BUF(6, "Schedule fwd:%c c:%s:%u v:%s:%u "
cd17f9ed099ed2 net/ipv4/ipvs/ip_vs_core.c Julius Volz 2008-09-02 566 "d:%s:%u conn->flags:%X conn->refcnt:%d\n",
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 567 ip_vs_fwd_tag(cp),
f18ae7206eaebf net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2014-09-09 568 IP_VS_DBG_ADDR(cp->af, &cp->caddr), ntohs(cp->cport),
f18ae7206eaebf net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2014-09-09 569 IP_VS_DBG_ADDR(cp->af, &cp->vaddr), ntohs(cp->vport),
f18ae7206eaebf net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2014-09-09 570 IP_VS_DBG_ADDR(cp->daf, &cp->daddr), ntohs(cp->dport),
b54ab92b84b616 net/netfilter/ipvs/ip_vs_core.c Reshetova, Elena 2017-03-16 571 cp->flags, refcount_read(&cp->refcnt));
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 572
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 573 if (!(svc->flags & IP_VS_SVC_F_STATELESS) ||
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 574 (svc->flags & IP_VS_SVC_F_STATELESS && need_state)) {
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 575 ip_vs_conn_stats(cp, svc);
b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 576 }
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 577 return cp;
^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 578 }
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