From patchwork Fri Oct 13 20:50:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Shtylyov X-Patchwork-Id: 13421658 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 91B05CDB483 for ; Fri, 13 Oct 2023 20:50:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229958AbjJMUus (ORCPT ); Fri, 13 Oct 2023 16:50:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229704AbjJMUur (ORCPT ); Fri, 13 Oct 2023 16:50:47 -0400 Received: from mx01.omp.ru (mx01.omp.ru [90.154.21.10]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CF4EA9 for ; Fri, 13 Oct 2023 13:50:45 -0700 (PDT) Received: from localhost.localdomain (178.176.73.157) by msexch01.omp.ru (10.188.4.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.986.14; Fri, 13 Oct 2023 23:50:36 +0300 From: Sergey Shtylyov To: Daniel Vetter , Helge Deller , , Subject: [PATCH v2 2/2] video: fbdev: core: syscopyarea: fix sloppy typing Date: Fri, 13 Oct 2023 23:50:24 +0300 Message-ID: <20231013205024.8099-3-s.shtylyov@omp.ru> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20231013205024.8099-1-s.shtylyov@omp.ru> References: <20231013205024.8099-1-s.shtylyov@omp.ru> MIME-Version: 1.0 X-Originating-IP: [178.176.73.157] X-ClientProxiedBy: msexch01.omp.ru (10.188.4.12) To msexch01.omp.ru (10.188.4.12) X-KSE-ServerInfo: msexch01.omp.ru, 9 X-KSE-AntiSpam-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 6.0.0, Database issued on: 10/13/2023 20:32:07 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 59 X-KSE-AntiSpam-Info: Lua profiles 180616 [Oct 13 2023] X-KSE-AntiSpam-Info: Version: 6.0.0.2 X-KSE-AntiSpam-Info: Envelope from: s.shtylyov@omp.ru X-KSE-AntiSpam-Info: LuaCore: 539 539 807534d9021bfe9ca369c363d15ac993cd93d4d9 X-KSE-AntiSpam-Info: {rep_avail} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: {relay has no DNS name} X-KSE-AntiSpam-Info: {SMTP from is not routable} X-KSE-AntiSpam-Info: {Found in DNSBL: 178.176.73.157 in (user) b.barracudacentral.org} X-KSE-AntiSpam-Info: {Found in DNSBL: 178.176.73.157 in (user) dbl.spamhaus.org} X-KSE-AntiSpam-Info: 127.0.0.199:7.1.2;omp.ru:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1 X-KSE-AntiSpam-Info: FromAlignment: s X-KSE-AntiSpam-Info: {rdns complete} X-KSE-AntiSpam-Info: {fromrtbl complete} X-KSE-AntiSpam-Info: ApMailHostAddress: 178.176.73.157 X-KSE-AntiSpam-Info: Rate: 59 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dmarc=none header.from=omp.ru;spf=none smtp.mailfrom=omp.ru;dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 10/13/2023 20:35:00 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 10/13/2023 4:55:00 PM X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org In sys_copyarea(), the local variable bits_per_line is needlessly typed as *unsigned long* -- which is a 32-bit type on the 32-bit arches and a 64-bit type on the 64-bit arches; that variable's value is derived from the __u32 typed fb_fix_screeninfo::line_length field (multiplied by 8u) and a 32-bit *unsigned int* type should still be enough to store the # of bits per line. Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool. Signed-off-by: Sergey Shtylyov --- drivers/video/fbdev/core/syscopyarea.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/core/syscopyarea.c b/drivers/video/fbdev/core/syscopyarea.c index c1eda3190968..7b8bd3a2bedc 100644 --- a/drivers/video/fbdev/core/syscopyarea.c +++ b/drivers/video/fbdev/core/syscopyarea.c @@ -316,7 +316,7 @@ void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area) { u32 dx = area->dx, dy = area->dy, sx = area->sx, sy = area->sy; u32 height = area->height, width = area->width; - unsigned long const bits_per_line = p->fix.line_length*8u; + unsigned int const bits_per_line = p->fix.line_length * 8u; unsigned long *base = NULL; int bits = BITS_PER_LONG, bytes = bits >> 3; unsigned dst_idx = 0, src_idx = 0, rev_copy = 0;