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Miller" , Eric Dumazet , Simon Horman Cc: oe-kbuild-all@lists.linux.dev, Wei Wang Subject: Re: [PATCH v9 net-next 2/5] psp: add new netlink cmd for dev-assoc and dev-disassoc Message-ID: <202604010708.Yck6IfPj-lkp@intel.com> References: <20260330223143.2394706-3-weibunny.kernel@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260330223143.2394706-3-weibunny.kernel@gmail.com> Hi Wei, kernel test robot noticed the following build warnings: [auto build test WARNING on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/Wei-Wang/psp-add-admin-non-admin-version-of-psp_device_get_locked/20260331-065558 base: net-next/main patch link: https://lore.kernel.org/r/20260330223143.2394706-3-weibunny.kernel%40gmail.com patch subject: [PATCH v9 net-next 2/5] psp: add new netlink cmd for dev-assoc and dev-disassoc config: sh-randconfig-r113-20260401 (https://download.01.org/0day-ci/archive/20260401/202604010708.Yck6IfPj-lkp@intel.com/config) compiler: sh4-linux-gcc (GCC) 15.2.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260401/202604010708.Yck6IfPj-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202604010708.Yck6IfPj-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> net/psp/psp_nl.c:494:13: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct psp_dev [noderef] __rcu *_n_ @@ got struct psp_dev *psd @@ net/psp/psp_nl.c:494:13: sparse: expected struct psp_dev [noderef] __rcu *_n_ net/psp/psp_nl.c:494:13: sparse: got struct psp_dev *psd vim +494 net/psp/psp_nl.c 449 450 int psp_nl_dev_assoc_doit(struct sk_buff *skb, struct genl_info *info) 451 { 452 struct psp_dev *psd = info->user_ptr[0]; 453 struct psp_assoc_dev *psp_assoc_dev; 454 struct net_device *assoc_dev; 455 u32 assoc_ifindex; 456 struct sk_buff *rsp; 457 struct net *net; 458 int nsid; 459 460 if (GENL_REQ_ATTR_CHECK(info, PSP_A_DEV_IFINDEX)) 461 return -EINVAL; 462 463 if (info->attrs[PSP_A_DEV_NSID]) { 464 nsid = nla_get_s32(info->attrs[PSP_A_DEV_NSID]); 465 466 net = get_net_ns_by_id(genl_info_net(info), nsid); 467 if (!net) { 468 NL_SET_BAD_ATTR(info->extack, 469 info->attrs[PSP_A_DEV_NSID]); 470 return -EINVAL; 471 } 472 } else { 473 net = get_net(genl_info_net(info)); 474 } 475 476 psp_assoc_dev = kzalloc(sizeof(*psp_assoc_dev), GFP_KERNEL); 477 if (!psp_assoc_dev) { 478 put_net(net); 479 return -ENOMEM; 480 } 481 482 assoc_ifindex = nla_get_u32(info->attrs[PSP_A_DEV_IFINDEX]); 483 assoc_dev = netdev_get_by_index(net, assoc_ifindex, 484 &psp_assoc_dev->dev_tracker, 485 GFP_KERNEL); 486 if (!assoc_dev) { 487 put_net(net); 488 kfree(psp_assoc_dev); 489 NL_SET_BAD_ATTR(info->extack, info->attrs[PSP_A_DEV_IFINDEX]); 490 return -ENODEV; 491 } 492 493 /* Check if device is already associated with a PSP device */ > 494 if (cmpxchg(&assoc_dev->psp_dev, NULL, psd)) { 495 NL_SET_ERR_MSG(info->extack, 496 "Device already associated with a PSP device"); 497 netdev_put(assoc_dev, &psp_assoc_dev->dev_tracker); 498 put_net(net); 499 kfree(psp_assoc_dev); 500 return -EBUSY; 501 } 502 503 psp_assoc_dev->assoc_dev = assoc_dev; 504 rsp = psp_nl_reply_new(info); 505 if (!rsp) { 506 rcu_assign_pointer(assoc_dev->psp_dev, NULL); 507 netdev_put(assoc_dev, &psp_assoc_dev->dev_tracker); 508 put_net(net); 509 kfree(psp_assoc_dev); 510 return -ENOMEM; 511 } 512 513 list_add_tail(&psp_assoc_dev->dev_list, &psd->assoc_dev_list); 514 515 put_net(net); 516 517 psp_nl_notify_dev(psd, PSP_CMD_DEV_CHANGE_NTF); 518 519 return psp_nl_reply_send(rsp, info); 520 } 521 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki