From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9788DC4167B for ; Fri, 1 Dec 2023 23:48:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231248AbjLAXsP (ORCPT ); Fri, 1 Dec 2023 18:48:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229447AbjLAXsO (ORCPT ); Fri, 1 Dec 2023 18:48:14 -0500 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9FD81AD for ; Fri, 1 Dec 2023 15:48:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701474500; x=1733010500; h=date:from:to:cc:subject:message-id:mime-version; bh=OCxQAzh0g1Swiyhk7+3YI6icCg7/EsTLTcp+7y+mHP0=; b=cKZMaD/PHxhF53W1QMUae18DCo2FhM7eKjN9m5ffcaR1wrCl93yg0p+G sopcl0fC07D0deJnGIPqj3/RnoKUXw19NycQzmmB9mswtEm1gZtTYfarA OAJpXVVk8eAxUL7D04UNwDmfFdQ8Wyz+boJG5dqQ9UHODWrDQ6Asz+2BL vgqluWJ1rHFU5zVoDF72WA11MvRfv8EMCHrALxqIaJqfM0bPWOr1VkWVr 3Bp4w0gKnA7rFJ3BTb/Wnh7cB6VUxHKeNXkA5MBtd/rcNZa7PbvmSKaoX SoBYK82NpIoYjKYRDA7leiBIyoMbZHvbZaA7jdWCfGFU88PZ905jBWR+M A==; X-IronPort-AV: E=McAfee;i="6600,9927,10911"; a="390728616" X-IronPort-AV: E=Sophos;i="6.04,243,1695711600"; d="scan'208";a="390728616" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2023 15:48:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10911"; a="835918586" X-IronPort-AV: E=Sophos;i="6.04,243,1695711600"; d="scan'208";a="835918586" Received: from lkp-server02.sh.intel.com (HELO b07ab15da5fe) ([10.239.97.151]) by fmsmga008.fm.intel.com with ESMTP; 01 Dec 2023 15:48:18 -0800 Received: from kbuild by b07ab15da5fe with local (Exim 4.96) (envelope-from ) id 1r9DEt-0004Q2-2E; Fri, 01 Dec 2023 23:48:11 +0000 Date: Sat, 2 Dec 2023 07:47:13 +0800 From: kernel test robot To: Michael Ellerman Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List , Alexander Potapenko , Marco Elver Subject: mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64 Message-ID: <202312020738.7YABe2N2-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c9a925b7bcd9552f19ba50519c6a49ed7ca61691 commit: 7581495ac82d6cb073609284c7f7186a48021d1e mm: kfence: fix false positives on big endian date: 7 months ago config: s390-randconfig-r113-20231102 (https://download.01.org/0day-ci/archive/20231202/202312020738.7YABe2N2-lkp@intel.com/config) compiler: s390-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20231202/202312020738.7YABe2N2-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/202312020738.7YABe2N2-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> mm/kfence/core.c:329:34: sparse: sparse: cast to restricted __le64 mm/kfence/core.c:333:34: sparse: sparse: cast to restricted __le64 mm/kfence/core.c:352:21: sparse: sparse: cast to restricted __le64 mm/kfence/core.c:372:21: sparse: sparse: cast to restricted __le64 mm/kfence/core.c:1181:9: sparse: sparse: context imbalance in 'kfence_handle_page_fault' - different lock contexts for basic block vim +329 mm/kfence/core.c 0ce20dd840897b Alexander Potapenko 2021-02-25 318 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 319 static inline void set_canary(const struct kfence_metadata *meta) 0ce20dd840897b Alexander Potapenko 2021-02-25 320 { 0ce20dd840897b Alexander Potapenko 2021-02-25 321 const unsigned long pageaddr = ALIGN_DOWN(meta->addr, PAGE_SIZE); 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 322 unsigned long addr = pageaddr; 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 323 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 324 /* 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 325 * The canary may be written to part of the object memory, but it does 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 326 * not affect it. The user should initialize the object before using it. 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 327 */ 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 328 for (; addr < meta->addr; addr += sizeof(u64)) 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 @329 *((u64 *)addr) = KFENCE_CANARY_PATTERN_U64; 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 330 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 331 addr = ALIGN_DOWN(meta->addr + meta->size, sizeof(u64)); 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 332 for (; addr - pageaddr < PAGE_SIZE; addr += sizeof(u64)) 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 333 *((u64 *)addr) = KFENCE_CANARY_PATTERN_U64; 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 334 } 1ba3cbf3ec3b21 Peng Zhang 2023-04-03 335 :::::: The code at line 329 was first introduced by commit :::::: 1ba3cbf3ec3b21d866436fb46b4bb7bdc38608f9 mm: kfence: improve the performance of __kfence_alloc() and __kfence_free() :::::: TO: Peng Zhang :::::: CC: Andrew Morton -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki