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 A670FC83F37 for ; Thu, 31 Aug 2023 21:23:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347548AbjHaVXr (ORCPT ); Thu, 31 Aug 2023 17:23:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33650 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242692AbjHaVXq (ORCPT ); Thu, 31 Aug 2023 17:23:46 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2417B10C2; Thu, 31 Aug 2023 14:23:34 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9DC89B823D4; Thu, 31 Aug 2023 21:23:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27F1DC433C8; Thu, 31 Aug 2023 21:23:28 +0000 (UTC) Date: Thu, 31 Aug 2023 23:23:26 +0200 From: Helge Deller To: Nick Desaulniers , linux-fbdev@vger.kernel.org, dri-devel , clang-built-linux , LKML , Andrew Morton , Nathan Chancellor Subject: Re: truncation in drivers/video/fbdev/neofb.c Message-ID: References: <9d2bb495-0c1d-0d1b-96ea-4b1110d45b79@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9d2bb495-0c1d-0d1b-96ea-4b1110d45b79@gmx.de> Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org * Helge Deller : > On 8/29/23 18:45, Nick Desaulniers wrote: > > A recent change in clang made it better about spotting snprintf that > > will result in truncation. Nathan reported the following instances: > > > > drivers/video/fbdev/neofb.c:1959:3: warning: 'snprintf' will always be > > truncated; specified size is 16, but format string expands to at least > > 17 [-Wfortify-source] FYI, I've added the patch below to the fbdev for-next git tree. Helge From: Helge Deller Subject: [PATCH] fbdev: neofb: Shorten Neomagic product name in info struct Avoid those compiler warnings: neofb.c:1959:3: warning: 'snprintf' will always be truncated; specified size is 16, but format string expands to at least 17 [-Wfortify-source] Signed-off-by: Helge Deller Reported-by: Nathan Chancellor Reported-by: Nick Desaulniers Link: https://lore.kernel.org/all/CAKwvOdn0xoVWjQ6ufM_rojtKb0f1i1hW-J_xYGfKDNFdHwaeHQ@mail.gmail.com/ Link: https://github.com/ClangBuiltLinux/linux/issues/1923 diff --git a/drivers/video/fbdev/neofb.c b/drivers/video/fbdev/neofb.c index d2f622b4c372..b905fe93b525 100644 --- a/drivers/video/fbdev/neofb.c +++ b/drivers/video/fbdev/neofb.c @@ -1948,49 +1948,40 @@ static struct fb_info *neo_alloc_fb_info(struct pci_dev *dev, switch (info->fix.accel) { case FB_ACCEL_NEOMAGIC_NM2070: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 128"); + strscpy(info->fix.id, "MagicGraph128", sizeof(info->fix.id)); break; case FB_ACCEL_NEOMAGIC_NM2090: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 128V"); + strscpy(info->fix.id, "MagicGraph128V", sizeof(info->fix.id)); break; case FB_ACCEL_NEOMAGIC_NM2093: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 128ZV"); + strscpy(info->fix.id, "MagicGraph128ZV", sizeof(info->fix.id)); break; case FB_ACCEL_NEOMAGIC_NM2097: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 128ZV+"); + strscpy(info->fix.id, "Mag.Graph128ZV+", sizeof(info->fix.id)); break; case FB_ACCEL_NEOMAGIC_NM2160: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 128XD"); + strscpy(info->fix.id, "MagicGraph128XD", sizeof(info->fix.id)); break; case FB_ACCEL_NEOMAGIC_NM2200: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 256AV"); + strscpy(info->fix.id, "MagicGraph256AV", sizeof(info->fix.id)); info->flags |= FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT; break; case FB_ACCEL_NEOMAGIC_NM2230: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 256AV+"); + strscpy(info->fix.id, "MagicGraph256AV+", sizeof(info->fix.id)); info->flags |= FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT; break; case FB_ACCEL_NEOMAGIC_NM2360: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 256ZX"); + strscpy(info->fix.id, "MagicGraph256ZX", sizeof(info->fix.id)); info->flags |= FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT; break; case FB_ACCEL_NEOMAGIC_NM2380: - snprintf(info->fix.id, sizeof(info->fix.id), - "MagicGraph 256XL+"); + strscpy(info->fix.id, "MagicGraph256XL+", sizeof(info->fix.id)); info->flags |= FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;