From patchwork Wed Sep 28 08:12:58 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: 12991787 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 0D143C6FA82 for ; Wed, 28 Sep 2022 08:14:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 128EC10E331; Wed, 28 Sep 2022 08:14:44 +0000 (UTC) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 97C9B10E321; Wed, 28 Sep 2022 08:14:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664352869; x=1695888869; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=fusilmdSQD+FIBKYeUukiHJrxKRQ3B5pPSTTQeO8rTk=; b=i4bMPqxSVYWvxF/CBJUgven/fsnHPPsPLKxr5BE2gySp+S+byEQzoVf/ K/5gaeBHMZqCrhRL8Pv/ORO1YmkMVl8p2IkRlbRpYg+PdWyKGGb4bFtop E4+m6h4b3q4lfPHJu9I686xHa0kDaScrA/mhn6QDKg7sQZU23PK2Q7PX2 q1qeByuAxy1JCW1/2wOKlTpiLHJX6fasLJ5THx0XtYYKKXsWTkk8uj6Ve By7lR03yTBTnGsW58VpcL7jFAGEehPO6HXLL0p6IOLqLBS5pnInlGnagA DNEeew33yupcnG8N4+3G1XoISYgaI6d0dra2eUYKuVIr0VciFIVxxRnX4 Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10483"; a="327904374" X-IronPort-AV: E=Sophos;i="5.93,351,1654585200"; d="scan'208";a="327904374" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Sep 2022 01:14:29 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10483"; a="621836391" X-IronPort-AV: E=Sophos;i="5.93,351,1654585200"; d="scan'208";a="621836391" Received: from maciejos-mobl.ger.corp.intel.com (HELO paris.ger.corp.intel.com) ([10.249.147.47]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Sep 2022 01:14:19 -0700 From: Gwan-gyeong Mun To: intel-gfx@lists.freedesktop.org Subject: [PATCH v13 7/9] drm/i915: Check if the size is too big while creating shmem file Date: Wed, 28 Sep 2022 11:12:58 +0300 Message-Id: <20220928081300.101516-8-gwan-gyeong.mun@intel.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220928081300.101516-1-gwan-gyeong.mun@intel.com> References: <20220928081300.101516-1-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: gustavoars@kernel.org, trix@redhat.com, dlatypov@google.com, llvm@lists.linux.dev, linux@rasmusvillemoes.dk, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, linux-hardening@vger.kernel.org, andrzej.hajda@intel.com, linux-sparse@vger.kernel.org, matthew.auld@intel.com, andi.shyti@linux.intel.com, airlied@redhat.com, thomas.hellstrom@linux.intel.com, keescook@chromium.org, jani.nikula@intel.com, nathan@kernel.org, mchehab@kernel.org, mauro.chehab@linux.intel.com, ndesaulniers@google.com, linux-kernel@vger.kernel.org, vitor@massaru.org, luc.vanoostenryck@gmail.com, 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 339b0a9cf2d0..ca30060e34ab 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);