From patchwork Wed Dec 28 14:25:31 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: 13082999 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 555E8C3DA7A for ; Wed, 28 Dec 2022 14:26:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0FB4A10E3AA; Wed, 28 Dec 2022 14:26:46 +0000 (UTC) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id E267910E3A8 for ; Wed, 28 Dec 2022 14:26:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1672237600; x=1703773600; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9Cr9ixCcUs7bTEjvY7bQVDS+W1GG8HwXfoHWRf/bUMA=; b=laN7NsjPlvTHA1PQgSERahT7ge1Qg/aRIXkgOz0VSGnhWLVZrh0b3Kh0 nARQuLYbyd/0rAGGuMIaRXA0EfoqtPvqCqEbJaubMSpiPEuUfM1u4yafI z32c+sfFiwHU+NY5Bdtdl09dYPLLXecqK04gv1nnMYTxC9vf6fA+hJSOI S+sloyBt0ebUH3KnpoPTXGCy9xX9EiUpHAln6ZOdUdSdGdU5tZRARJ2bv aQZCmX/ei96d1hJXNBMHoXtbTx/TC7rj9CM+8/xyshDyQcByTcS6Okz6p es+MSqYBaGckJAHZ2yubtsw2kxrxNadEWO+q7pYbkOkh/iEGvWoEfOeUO w==; X-IronPort-AV: E=McAfee;i="6500,9779,10574"; a="322113489" X-IronPort-AV: E=Sophos;i="5.96,280,1665471600"; d="scan'208";a="322113489" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Dec 2022 06:26:40 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10574"; a="982101466" X-IronPort-AV: E=Sophos;i="5.96,280,1665471600"; d="scan'208";a="982101466" Received: from rsznejde-mobl.ger.corp.intel.com (HELO paris.ger.corp.intel.com) ([10.249.140.251]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Dec 2022 06:26:36 -0800 From: Gwan-gyeong Mun To: intel-gfx@lists.freedesktop.org Date: Wed, 28 Dec 2022 16:25:31 +0200 Message-Id: <20221228142533.880703-5-gwan-gyeong.mun@intel.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20221228142533.880703-1-gwan-gyeong.mun@intel.com> References: <20221228142533.880703-1-gwan-gyeong.mun@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v15 4/6] drm/i915: Check if the size is too big while creating shmem file X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thomas.hellstrom@linux.intel.com, andrzej.hajda@intel.com, jani.nikula@intel.com, chris@chris-wilson.co.uk, matthew.auld@intel.com, mchehab@kernel.org, nirmoy.das@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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. Cc: Chris Wilson Cc: Matthew Auld Cc: Thomas Hellström Signed-off-by: Gwan-gyeong Mun 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 28e857f8c169..e767791e40e0 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);