From patchwork Wed Dec 19 17:08:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Engestrom X-Patchwork-Id: 10737795 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7F3456C5 for ; Wed, 19 Dec 2018 17:09:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 66D6A297EB for ; Wed, 19 Dec 2018 17:09:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5AE2D2B50A; Wed, 19 Dec 2018 17:09:26 +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 1D4A4297EB for ; Wed, 19 Dec 2018 17:09:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4DB976F0E4; Wed, 19 Dec 2018 17:09:23 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 310426F0E3 for ; Wed, 19 Dec 2018 17:09:22 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Dec 2018 09:09:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,373,1539673200"; d="scan'208";a="260775736" Received: from kszypryt-mobl.ger.corp.intel.com (HELO eengestr-dev.ger.corp.intel.com) ([10.251.83.167]) by orsmga004.jf.intel.com with ESMTP; 19 Dec 2018 09:09:20 -0800 From: Eric Engestrom To: dri-devel@lists.freedesktop.org Subject: [PATCH libdrm 2/3] xf86drm: use max size of drm node name instead of arbitrary size Date: Wed, 19 Dec 2018 17:08:02 +0000 Message-Id: <20181219170803.23452-2-eric.engestrom@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20181219170803.23452-1-eric.engestrom@intel.com> References: <20181219170803.23452-1-eric.engestrom@intel.com> MIME-Version: 1.0 Organization: Intel Corp UK 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Eric Engestrom --- xf86drm.c | 4 ++-- xf86drm.h | 8 ++++++++ 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/xf86drm.c b/xf86drm.c index 07425b19897d00a19e8a..95854e153ec7e9d264bc 100644 --- a/xf86drm.c +++ b/xf86drm.c @@ -317,7 +317,7 @@ static int drmOpenDevice(dev_t dev, int minor, int type) { stat_t st; const char *dev_name; - char buf[64]; + char buf[DRM_NODE_NAME_MAX]; int fd; mode_t devmode = DRM_DEV_MODE, serv_mode; gid_t serv_group; @@ -445,7 +445,7 @@ static int drmOpenDevice(dev_t dev, int minor, int type) static int drmOpenMinor(int minor, int create, int type) { int fd; - char buf[64]; + char buf[DRM_NODE_NAME_MAX]; const char *dev_name; if (create) diff --git a/xf86drm.h b/xf86drm.h index 18668ff3d40d7db55c95..00fbdb35a9a8fb5e9f27 100644 --- a/xf86drm.h +++ b/xf86drm.h @@ -93,6 +93,14 @@ extern "C" { #define DRM_CONTROL_DEV_NAME "%s/" DRM_CONTROL_MINOR_NAME "%d" #define DRM_RENDER_DEV_NAME "%s/" DRM_RENDER_MINOR_NAME "%d" +#define DRM_NODE_NAME_MAX \ + (sizeof(DRM_DIR_NAME) + 1 /* slash */ \ + + MAX3(sizeof(DRM_PRIMARY_MINOR_NAME), \ + sizeof(DRM_CONTROL_MINOR_NAME), \ + sizeof(DRM_RENDER_MINOR_NAME)) \ + + sizeof("64") /* highest possible node number */ \ + + 1) /* NULL-terminator */ + #define DRM_ERR_NO_DEVICE (-1001) #define DRM_ERR_NO_ACCESS (-1002) #define DRM_ERR_NOT_ROOT (-1003)