From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Date: Tue, 10 Dec 2019 22:30:28 +0000 Subject: [PATCH AUTOSEL 4.9 84/91] fbtft: Make sure string is NULL terminated Message-Id: <20191210223035.14270-84-sashal@kernel.org> List-Id: References: <20191210223035.14270-1-sashal@kernel.org> In-Reply-To: <20191210223035.14270-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sasha Levin , devel@driverdev.osuosl.org, linux-fbdev@vger.kernel.org, Greg Kroah-Hartman , dri-devel@lists.freedesktop.org, Andy Shevchenko From: Andy Shevchenko [ Upstream commit 21f585480deb4bcf0d92b08879c35d066dfee030 ] New GCC warns about inappropriate use of strncpy(): drivers/staging/fbtft/fbtft-core.c: In function ‘fbtft_framebuffer_alloc’: drivers/staging/fbtft/fbtft-core.c:665:2: warning: ‘strncpy’ specified bound 16 equals destination size [-Wstringop-truncation] 665 | strncpy(info->fix.id, dev->driver->name, 16); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Later on the copy is being used with the assumption to be NULL terminated. Make sure string is NULL terminated by switching to snprintf(). Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20191120095716.26628-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/staging/fbtft/fbtft-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c index d9ba8c0f1353b..ece713d026607 100644 --- a/drivers/staging/fbtft/fbtft-core.c +++ b/drivers/staging/fbtft/fbtft-core.c @@ -766,7 +766,7 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display, fbdefio->deferred_io = fbtft_deferred_io; fb_deferred_io_init(info); - strncpy(info->fix.id, dev->driver->name, 16); + snprintf(info->fix.id, sizeof(info->fix.id), "%s", dev->driver->name); info->fix.type = FB_TYPE_PACKED_PIXELS; info->fix.visual = FB_VISUAL_TRUECOLOR; info->fix.xpanstep = 0; -- 2.20.1 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 X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E312C43603 for ; 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Tue, 10 Dec 2019 22:32:16 +0000 (UTC) Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A8EEC214AF; Tue, 10 Dec 2019 22:32:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017136; bh=rYsSXhlJmyoW6Nfvt5sPsIBN9RZGmO0tbZ6Q3HLc7Mg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=05ub06dwMrA760vRYNjwZmGyxgyvzsbfLwm/qX/c/HBouwzSnED9m4EjJNMkYgfz2 baUdUtJ92hq/VHguM5aBlz6/IkCSuj7r+pBBLudYhveKkFf3/zQaBnbnzVvfWK8RfB OSBVPXUCb/buToZT8/g3iird2ikVYOyYKLbNrWYA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 84/91] fbtft: Make sure string is NULL terminated Date: Tue, 10 Dec 2019 17:30:28 -0500 Message-Id: <20191210223035.14270-84-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210223035.14270-1-sashal@kernel.org> References: <20191210223035.14270-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , devel@driverdev.osuosl.org, linux-fbdev@vger.kernel.org, Greg Kroah-Hartman , dri-devel@lists.freedesktop.org, Andy Shevchenko Content-Type: text/plain; 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Tue, 10 Dec 2019 22:32:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017136; bh=rYsSXhlJmyoW6Nfvt5sPsIBN9RZGmO0tbZ6Q3HLc7Mg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=05ub06dwMrA760vRYNjwZmGyxgyvzsbfLwm/qX/c/HBouwzSnED9m4EjJNMkYgfz2 baUdUtJ92hq/VHguM5aBlz6/IkCSuj7r+pBBLudYhveKkFf3/zQaBnbnzVvfWK8RfB OSBVPXUCb/buToZT8/g3iird2ikVYOyYKLbNrWYA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andy Shevchenko , Greg Kroah-Hartman , Sasha Levin , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, devel@driverdev.osuosl.org Subject: [PATCH AUTOSEL 4.9 84/91] fbtft: Make sure string is NULL terminated Date: Tue, 10 Dec 2019 17:30:28 -0500 Message-Id: <20191210223035.14270-84-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210223035.14270-1-sashal@kernel.org> References: <20191210223035.14270-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andy Shevchenko [ Upstream commit 21f585480deb4bcf0d92b08879c35d066dfee030 ] New GCC warns about inappropriate use of strncpy(): drivers/staging/fbtft/fbtft-core.c: In function ‘fbtft_framebuffer_alloc’: drivers/staging/fbtft/fbtft-core.c:665:2: warning: ‘strncpy’ specified bound 16 equals destination size [-Wstringop-truncation] 665 | strncpy(info->fix.id, dev->driver->name, 16); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Later on the copy is being used with the assumption to be NULL terminated. Make sure string is NULL terminated by switching to snprintf(). Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20191120095716.26628-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/staging/fbtft/fbtft-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c index d9ba8c0f1353b..ece713d026607 100644 --- a/drivers/staging/fbtft/fbtft-core.c +++ b/drivers/staging/fbtft/fbtft-core.c @@ -766,7 +766,7 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display, fbdefio->deferred_io = fbtft_deferred_io; fb_deferred_io_init(info); - strncpy(info->fix.id, dev->driver->name, 16); + snprintf(info->fix.id, sizeof(info->fix.id), "%s", dev->driver->name); info->fix.type = FB_TYPE_PACKED_PIXELS; info->fix.visual = FB_VISUAL_TRUECOLOR; info->fix.xpanstep = 0; -- 2.20.1