From nobody Thu Dec 18 05:04:52 2025 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 345FAC4167B for ; Tue, 28 Nov 2023 07:56:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343924AbjK1Hzy (ORCPT ); Tue, 28 Nov 2023 02:55:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343933AbjK1Hzm (ORCPT ); Tue, 28 Nov 2023 02:55:42 -0500 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F72399 for ; Mon, 27 Nov 2023 23:55:42 -0800 (PST) X-UUID: 839542ea8dc311ee8051498923ad61e6-20231128 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=EIqL2tD5DZPZv4cReb9xm7HmNydPz9ibyBpjJNHePvQ=; b=isnw1ekp5u0CfZw4wekAgZfg5/+Tcbno+jOSORjqH6t/7Sv8iE8ciyHQEWM08Q4p0RJpZy/5FSuyJByQOdubPFR2vH1ZbzRPGcnQyA5lF49+3mcwewgPGnIhQ5zKcTwE45Ar4MZTCZB1/XHjhFcNZngWBv+fbnfbWzlsmHYjN6A=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.34,REQID:4a3aa1d3-ec6a-4d77-8b8f-f09482cef926,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:abefa75,CLOUDID:5ca19060-c89d-4129-91cb-8ebfae4653fc,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR: NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: 839542ea8dc311ee8051498923ad61e6-20231128 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 877891212; Tue, 28 Nov 2023 15:55:36 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 28 Nov 2023 15:55:34 +0800 Received: from mszsdtlt102.gcn.mediatek.inc (10.16.4.142) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 28 Nov 2023 15:55:34 +0800 From: Haibo Li To: CC: Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , "Andrew Morton" , Matthias Brugger , AngeloGioacchino Del Regno , , , , , , Haibo Li , kernel test robot Subject: [PATCH] fix comparison of unsigned expression < 0 Date: Tue, 28 Nov 2023 15:55:32 +0800 Message-ID: <20231128075532.110251-1-haibo.li@mediatek.com> X-Mailer: git-send-email 2.34.3 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--2.749500-8.000000 X-TMASE-MatchedRID: iv01+ZwXeFIryFHbNnBLG0Zakoam9+aebT2gc93yznn9Ez/5IpHqp8lm 7UT8OKjb009cKtuMq44lKzzhiO1jPncna+FgAjo0nVTWWiNp+v/jxSCk4x2AYd9RlPzeVuQQObA 90TJq6C8/ApdYBbUVKYAy6p60ZV621gi3JUE8ePKSkBrqwsq4PfoLR4+zsDTttrrTuahHzlFU1G 84il7EfntKKivhCrlfE0eoKE0hYr807dg5hv5gH9S5x4PKrQ/8rxK9BaJJfxtRJt1IVZ02lKixa UIRQLoOAGAn9m+WxPvyNp7g4PXe0BXsxz6ujBxUq1f8XSkHBUmNJXmEMVvLtpRMZUCEHkRt X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--2.749500-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 181391F854EACAAB2F00F5A6344B770795AAFA39D774CB1EEFDEC7134135C8032000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Kernel test robot reported: ''' mm/kasan/report.c:637 kasan_non_canonical_hook() warn: unsigned 'addr' is never less than zero. ''' The KASAN_SHADOW_OFFSET is 0 on loongarch64. To fix it,check the KASAN_SHADOW_OFFSET before do comparison. Signed-off-by: Haibo Li Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/ 202311270743.3oTCwYPd-lkp@intel.com/ --- mm/kasan/report.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/kasan/report.c b/mm/kasan/report.c index e77facb62900..dafec2df0268 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -634,10 +634,10 @@ void kasan_non_canonical_hook(unsigned long addr) { unsigned long orig_addr; const char *bug_type; - +#if KASAN_SHADOW_OFFSET > 0 if (addr < KASAN_SHADOW_OFFSET) return; - +#endif orig_addr =3D (addr - KASAN_SHADOW_OFFSET) << KASAN_SHADOW_SCALE_SHIFT; /* * For faults near the shadow address for NULL, we can be fairly certain --=20 2.18.0