From patchwork Sun Jun 3 14:40:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikulas Patocka X-Patchwork-Id: 10445385 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8C834603B4 for ; Sun, 3 Jun 2018 15:19:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7B1C6289ED for ; Sun, 3 Jun 2018 15:19:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 700A228ACB; Sun, 3 Jun 2018 15:19:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 304B0289ED for ; Sun, 3 Jun 2018 15:19:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C103C6E274; Sun, 3 Jun 2018 15:19:14 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from leontynka.twibright.com (109-183-129-149.tmcz.cz [109.183.129.149]) by gabe.freedesktop.org (Postfix) with ESMTPS id F42186E286 for ; Sun, 3 Jun 2018 15:19:12 +0000 (UTC) Received: from root by leontynka.twibright.com with local (Exim 4.89) (envelope-from ) id 1fPUD6-0003pL-PR; Sun, 03 Jun 2018 16:42:20 +0200 Message-Id: <20180603144220.475786254@twibright.com> User-Agent: quilt/0.63-1 Date: Sun, 03 Jun 2018 16:40:57 +0200 From: Mikulas Patocka To: Mikulas Patocka , Bartlomiej Zolnierkiewicz , Dave Airlie , Bernie Thompson , Ladislav Michl Subject: [PATCH 04/21] udl-kms: fix crash due to uninitialized memory References: <20180603144053.875668929@twibright.com> MIME-Version: 1.0 Content-Disposition: inline; filename=udlkms-defio-kzalloc.patch X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP We must use kzalloc when allocating the fb_deferred_io structure. Otherwise, the field first_io is undefined and it causes a crash. Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org --- drivers/gpu/drm/udl/udl_fb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-4.16.12/drivers/gpu/drm/udl/udl_fb.c =================================================================== --- linux-4.16.12.orig/drivers/gpu/drm/udl/udl_fb.c 2018-05-29 17:55:39.000000000 +0200 +++ linux-4.16.12/drivers/gpu/drm/udl/udl_fb.c 2018-05-29 17:55:39.000000000 +0200 @@ -221,7 +221,7 @@ static int udl_fb_open(struct fb_info *i struct fb_deferred_io *fbdefio; - fbdefio = kmalloc(sizeof(struct fb_deferred_io), GFP_KERNEL); + fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL); if (fbdefio) { fbdefio->delay = DL_DEFIO_WRITE_DELAY;