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 444C9C4167B for ; Mon, 27 Nov 2023 00:26:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229667AbjK0A02 (ORCPT ); Sun, 26 Nov 2023 19:26:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46582 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229472AbjK0A00 (ORCPT ); Sun, 26 Nov 2023 19:26:26 -0500 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E35C8114 for ; Sun, 26 Nov 2023 16:26:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701044792; x=1732580792; h=date:from:to:cc:subject:message-id:mime-version; bh=QnRtzoIrZsRXulbETwnxRfPI/Aq9Z5qUVIiHRcrOzE0=; b=EZyiNFkrAI83LCzAnvoCVOoiAwjo5ARUHQb/kFBq7AkwoFhI6xxnEwWn HTLNTe7Milmoxl7E19YbrMuTvfVbRooeF5lznfY71lKCHmrK4mN9D9rIl 4JU1CmRHJNQ8B/zByL9gwp19nykHgaLYEbYAYHeyc9X9M6iH1VZJmu0MG O4oHRla1VWx0yAjgyDfRMPjTXnPElZ3dyPmlGpFiGAS7fEeCewtj8O87s T+GheYJYiWPmJwJg44eLsDlxgxeIHLg9UjBnhUx/z1mKw0thfzocal5w0 pMM85aCWZokuj2FyuUxFbEn3W+FtWHaZA1M1Hhzngc+KYyzDFgdCJmN8+ w==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="389763179" X-IronPort-AV: E=Sophos;i="6.04,229,1695711600"; d="scan'208";a="389763179" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 16:26:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="891568232" X-IronPort-AV: E=Sophos;i="6.04,229,1695711600"; d="scan'208";a="891568232" Received: from lkp-server01.sh.intel.com (HELO d584ee6ebdcc) ([10.239.97.150]) by orsmga004.jf.intel.com with ESMTP; 26 Nov 2023 16:26:30 -0800 Received: from kbuild by d584ee6ebdcc with local (Exim 4.96) (envelope-from ) id 1r7PSF-0005f6-2p; Mon, 27 Nov 2023 00:26:27 +0000 Date: Mon, 27 Nov 2023 08:25:28 +0800 From: kernel test robot To: Haibo Li Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List , Andrey Konovalov Subject: mm/kasan/report.c:637 kasan_non_canonical_hook() warn: unsigned 'addr' is never less than zero. Message-ID: <202311270743.3oTCwYPd-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: d2da77f431ac49b5763b88751a75f70daa46296c commit: babddbfb7d7d70ae7f10fedd75a45d8ad75fdddf kasan: print the original fault addr when access invalid shadow date: 6 weeks ago config: loongarch-randconfig-r071-20231126 (https://download.01.org/0day-ci/archive/20231127/202311270743.3oTCwYPd-lkp@intel.com/config) compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20231127/202311270743.3oTCwYPd-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/202311270743.3oTCwYPd-lkp@intel.com/ smatch warnings: mm/kasan/report.c:637 kasan_non_canonical_hook() warn: unsigned 'addr' is never less than zero. vim +/addr +637 mm/kasan/report.c bb2f967ce2130b Andrey Konovalov 2022-03-24 623 2f004eea0fc8f8 Jann Horn 2019-12-19 624 /* babddbfb7d7d70 Haibo Li 2023-10-09 625 * With CONFIG_KASAN, accesses to bogus pointers (outside the high 2f004eea0fc8f8 Jann Horn 2019-12-19 626 * canonical half of the address space) cause out-of-bounds shadow memory reads 2f004eea0fc8f8 Jann Horn 2019-12-19 627 * before the actual access. For addresses in the low canonical half of the 2f004eea0fc8f8 Jann Horn 2019-12-19 628 * address space, as well as most non-canonical addresses, that out-of-bounds 2f004eea0fc8f8 Jann Horn 2019-12-19 629 * shadow memory access lands in the non-canonical part of the address space. 2f004eea0fc8f8 Jann Horn 2019-12-19 630 * Help the user figure out what the original bogus pointer was. 2f004eea0fc8f8 Jann Horn 2019-12-19 631 */ 2f004eea0fc8f8 Jann Horn 2019-12-19 632 void kasan_non_canonical_hook(unsigned long addr) 2f004eea0fc8f8 Jann Horn 2019-12-19 633 { 2f004eea0fc8f8 Jann Horn 2019-12-19 634 unsigned long orig_addr; 2f004eea0fc8f8 Jann Horn 2019-12-19 635 const char *bug_type; 2f004eea0fc8f8 Jann Horn 2019-12-19 636 2f004eea0fc8f8 Jann Horn 2019-12-19 @637 if (addr < KASAN_SHADOW_OFFSET) :::::: The code at line 637 was first introduced by commit :::::: 2f004eea0fc8f86b45dfc2007add2d4986de8d02 x86/kasan: Print original address on #GP :::::: TO: Jann Horn :::::: CC: Borislav Petkov -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki