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X-CSE-ConnectionGUID: HqM2rHIYRbO14PfFmgfzwg== X-CSE-MsgGUID: fIUn70OcQf2F2XU1Ps1D2w== X-IronPort-AV: E=McAfee;i="6800,10657,11868"; a="97118237" X-IronPort-AV: E=Sophos;i="6.25,211,1779174000"; d="scan'208";a="97118237" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Aug 2026 18:54:21 -0700 X-CSE-ConnectionGUID: thCLyFiPRT2fQbjTkkwdlQ== X-CSE-MsgGUID: BSYcDzSiSH+IbP0I0wY0pw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,211,1779174000"; d="scan'208";a="259233719" Received: from lkp-server01.sh.intel.com (HELO 6eda058d650d) ([10.239.97.150]) by fmviesa007.fm.intel.com with ESMTP; 07 Aug 2026 18:54:19 -0700 Received: from kbuild by 6eda058d650d with local (Exim 4.98.2) (envelope-from ) id 1wsWGO-00000000JcZ-1ayi; Sat, 08 Aug 2026 01:54:16 +0000 Date: Sat, 08 Aug 2026 09:53:40 +0800 From: kernel test robot To: Wei Wang Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Jakub Kicinski , Daniel Zahka Subject: net/psp/psp_nl.c:513:13: sparse: sparse: cast removes address space '__rcu' of expression Message-ID: <202608080910.l9KvOH7O-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: bcc44b6785f216eb939226ade6e3910baa30516b commit: 06c2dce2d0f69727144443664182052f56d1da35 psp: add new netlink cmd for dev-assoc and dev-disassoc date: 8 weeks ago config: riscv-randconfig-r131-20260807 (https://download.01.org/0day-ci/archive/20260808/202608080910.l9KvOH7O-lkp@intel.com/config) compiler: riscv64-linux-gcc (GCC) 8.5.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260808/202608080910.l9KvOH7O-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 | Fixes: 06c2dce2d0f6 ("psp: add new netlink cmd for dev-assoc and dev-disassoc") | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202608080910.l9KvOH7O-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> net/psp/psp_nl.c:513:13: sparse: sparse: cast removes address space '__rcu' of expression vim +/__rcu +513 net/psp/psp_nl.c 475 476 int psp_nl_dev_assoc_doit(struct sk_buff *skb, struct genl_info *info) 477 { 478 struct psp_dev *psd = info->user_ptr[0]; 479 struct psp_assoc_dev *psp_assoc_dev; 480 struct net_device *assoc_dev; 481 struct sk_buff *rsp; 482 u32 assoc_ifindex; 483 struct net *net; 484 int err; 485 486 if (psd->assoc_dev_cnt >= PSP_ASSOC_DEV_MAX) { 487 NL_SET_ERR_MSG(info->extack, 488 "Maximum number of associated devices reached"); 489 return -ENOSPC; 490 } 491 492 net = psp_nl_resolve_assoc_dev_ns(psd, info); 493 if (IS_ERR(net)) 494 return PTR_ERR(net); 495 496 psp_assoc_dev = kzalloc_obj(*psp_assoc_dev); 497 if (!psp_assoc_dev) { 498 err = -ENOMEM; 499 goto err_put_net; 500 } 501 502 assoc_ifindex = nla_get_u32(info->attrs[PSP_A_DEV_IFINDEX]); 503 assoc_dev = netdev_get_by_index(net, assoc_ifindex, 504 &psp_assoc_dev->dev_tracker, 505 GFP_KERNEL); 506 if (!assoc_dev) { 507 NL_SET_BAD_ATTR(info->extack, info->attrs[PSP_A_DEV_IFINDEX]); 508 err = -ENODEV; 509 goto err_free_assoc; 510 } 511 512 /* Check if device is already associated with a PSP device */ > 513 if (cmpxchg(&assoc_dev->psp_dev, NULL, RCU_INITIALIZER(psd))) { 514 NL_SET_ERR_MSG(info->extack, 515 "Device already associated with a PSP device"); 516 err = -EBUSY; 517 goto err_put_dev; 518 } 519 520 psp_assoc_dev->assoc_dev = assoc_dev; 521 rsp = psp_nl_reply_new(info); 522 if (!rsp) { 523 err = -ENOMEM; 524 goto err_clean_ptr; 525 } 526 527 list_add_tail(&psp_assoc_dev->dev_list, &psd->assoc_dev_list); 528 psd->assoc_dev_cnt++; 529 530 put_net(net); 531 532 psp_nl_notify_dev(psd, PSP_CMD_DEV_CHANGE_NTF); 533 534 return psp_nl_reply_send(rsp, info); 535 536 err_clean_ptr: 537 rcu_assign_pointer(assoc_dev->psp_dev, NULL); 538 err_put_dev: 539 netdev_put(assoc_dev, &psp_assoc_dev->dev_tracker); 540 err_free_assoc: 541 kfree(psp_assoc_dev); 542 err_put_net: 543 put_net(net); 544 545 return err; 546 } 547 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki