From patchwork Mon Jul 25 09:25:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gwan-gyeong Mun X-Patchwork-Id: 12927915 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5DCC0CCA473 for ; Mon, 25 Jul 2022 09:27:01 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0D3252B454; Mon, 25 Jul 2022 09:26:43 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id B85B32BA8A; Mon, 25 Jul 2022 09:26:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1658741197; x=1690277197; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3/KYF6zMSfA8GMeQGkJ+lLvI5E2TF0sPmk9vV/KyNZw=; b=QZlh2QXPuCMleyMeGoF0n7bSJ2MaIolQnUpDXuDh/eHXzf15uVmeuxHN xdfOuJZeYy7ib8LX09KF+ggklssw+S1F6E+GEUIOpJ6shcftD0XFS8JGf QC2SMXG35iWcGW9GDlp9aK8n3sV8cJQ0tGoeGV7bgwXaGPmtX9+cRSfWg JJdwZLaQBl9+Pfplep3RYx/ZbNejIwXIfs8QZI+nZLtbPln12LxuitpF+ i5uHrkmSQ6cFLI1P07Fyu3lEqom+QppgqSY2CO8gxmVrbUhOZagijv8qR ly/JcEgfXuR2yqO+12zovccx+3pFG5HzfdK3SF9Xo/OBWv98w9srsmJRj A==; X-IronPort-AV: E=McAfee;i="6400,9594,10418"; a="268047821" X-IronPort-AV: E=Sophos;i="5.93,192,1654585200"; d="scan'208";a="268047821" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2022 02:26:32 -0700 X-IronPort-AV: E=Sophos;i="5.93,192,1654585200"; d="scan'208";a="926823860" Received: from abaruah-mobl.gar.corp.intel.com (HELO hades.ger.corp.intel.com) ([10.249.37.11]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2022 02:26:30 -0700 From: Gwan-gyeong Mun To: intel-gfx@lists.freedesktop.org Subject: [PATCH v5 5/7] drm/i915: Check if the size is too big while creating shmem file Date: Mon, 25 Jul 2022 12:25:26 +0300 Message-Id: <20220725092528.1281487-6-gwan-gyeong.mun@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220725092528.1281487-1-gwan-gyeong.mun@intel.com> References: <20220725092528.1281487-1-gwan-gyeong.mun@intel.com> MIME-Version: 1.0 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: thomas.hellstrom@linux.intel.com, jani.nikula@intel.com, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, airlied@linux.ie, matthew.auld@intel.com, mchehab@kernel.org, nirmoy.das@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The __shmem_file_setup() function returns -EINVAL if size is greater than MAX_LFS_FILESIZE. To handle the same error as other code that returns -E2BIG when the size is too large, it add a code that returns -E2BIG when the size is larger than the size that can be handled. v4: If BITS_PER_LONG is 32, size > MAX_LFS_FILESIZE is always false, so it checks only when BITS_PER_LONG is 64. Signed-off-by: Gwan-gyeong Mun Cc: Chris Wilson Cc: Matthew Auld Cc: Thomas Hellström Reviewed-by: Nirmoy Das Reviewed-by: Mauro Carvalho Chehab Reported-by: kernel test robot Reviewed-by: Andrzej Hajda --- drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c index 604e8829e8ea..d41569ca6999 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c @@ -541,6 +541,20 @@ static int __create_shmem(struct drm_i915_private *i915, drm_gem_private_object_init(&i915->drm, obj, size); + /* XXX: The __shmem_file_setup() function returns -EINVAL if size is + * greater than MAX_LFS_FILESIZE. + * To handle the same error as other code that returns -E2BIG when + * the size is too large, we add a code that returns -E2BIG when the + * size is larger than the size that can be handled. + * If BITS_PER_LONG is 32, size > MAX_LFS_FILESIZE is always false, + * so we only needs to check when BITS_PER_LONG is 64. + * If BITS_PER_LONG is 32, E2BIG checks are processed when + * i915_gem_object_size_2big() is called before init_object() callback + * is called. + */ + if (BITS_PER_LONG == 64 && size > MAX_LFS_FILESIZE) + return -E2BIG; + if (i915->mm.gemfs) filp = shmem_file_setup_with_mnt(i915->mm.gemfs, "i915", size, flags);