From mboxrd@z Thu Jan 1 00:00:00 1970 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 8FC8BC3ABC0 for ; Wed, 7 May 2025 16:03:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 39E4C10E881; Wed, 7 May 2025 16:03:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="hjJrDtm8"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) by gabe.freedesktop.org (Postfix) with ESMTPS id B541C10E8B1; Wed, 7 May 2025 16:03:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1746633821; x=1778169821; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=b9RSxDugkcQQRyOlDcCIsAh14gLge+OfImLfziHdF40=; b=hjJrDtm8gxwJ4LNp3yakOtXDZvOZAAG4cgs0fcWWqyPyfdFQHKbnaJHQ 6wstcParSXQvD3mJ4VnafNaXyIhQtRSFHExc5JeNIceilPhinmdBdSgwp gLwlI3WpjgmrSRrVyGUst+YIpsjRYyzL7ctY211DSXC+/N/iUeEDu0qOB FMPYrC5DUNAPOxTqX9WDPCS/uQq+gGsCehThDAd9LrA/8PN7VzQvDMSpx +h8Oi+Spm5TN6Hq4FBh9fk0x8plaJ9lbyaZWfb0QTqeDlYQA1JZdQd/+A Nq0iby6hCWxcEuSsVcLFR0oxfHk7zY8jmKeqgpQs3ZAjmL/kkxzDPBMuj w==; X-CSE-ConnectionGUID: KjuPhqnbTZGbJHWYpuHGNw== X-CSE-MsgGUID: IxmSWos3T+OIv8sRgRvzbg== X-IronPort-AV: E=McAfee;i="6700,10204,11426"; a="47633150" X-IronPort-AV: E=Sophos;i="6.15,269,1739865600"; d="scan'208";a="47633150" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 May 2025 08:57:28 -0700 X-CSE-ConnectionGUID: L0Hgyw3UR0yZe2814PDkPw== X-CSE-MsgGUID: RPqz1h2+TEiEd5fOPDF+uQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,269,1739865600"; d="scan'208";a="137002881" Received: from dut4036ptlh.fm.intel.com ([10.105.8.54]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 May 2025 08:57:27 -0700 From: Jonathan Cavitt To: intel-xe@lists.freedesktop.org Cc: saurabhg.gupta@intel.com, alex.zuo@intel.com, jonathan.cavitt@intel.com, joonas.lahtinen@linux.intel.com, matthew.brost@intel.com, jianxun.zhang@intel.com, shuicheng.lin@intel.com, dri-devel@lists.freedesktop.org, Michal.Wajdeczko@intel.com, michal.mrozek@intel.com, raag.jadav@intel.com, john.c.harrison@intel.com, ivan.briano@intel.com, matthew.auld@intel.com, dafna.hirschfield@intel.com Subject: [PATCH v24 1/5] drm/xe/xe_gt_pagefault: Disallow writes to read-only VMAs Date: Wed, 7 May 2025 15:57:22 +0000 Message-ID: <20250507155727.130444-2-jonathan.cavitt@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250507155727.130444-1-jonathan.cavitt@intel.com> References: <20250507155727.130444-1-jonathan.cavitt@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" The page fault handler should reject write/atomic access to read only VMAs. Add code to handle this in handle_pagefault after the VMA lookup. Fixes: 3d420e9fa848 ("drm/xe: Rework GPU page fault handling") Signed-off-by: Jonathan Cavitt Suggested-by: Matthew Brost Reviewed-by: Shuicheng Lin Reviewed-by: Matthew Brost --- drivers/gpu/drm/xe/xe_gt_pagefault.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_gt_pagefault.c b/drivers/gpu/drm/xe/xe_gt_pagefault.c index 10622ca471a2..d4e3b7eb165a 100644 --- a/drivers/gpu/drm/xe/xe_gt_pagefault.c +++ b/drivers/gpu/drm/xe/xe_gt_pagefault.c @@ -237,6 +237,11 @@ static int handle_pagefault(struct xe_gt *gt, struct pagefault *pf) goto unlock_vm; } + if (xe_vma_read_only(vma) && pf->access_type != ACCESS_TYPE_READ) { + err = -EPERM; + goto unlock_vm; + } + atomic = access_is_atomic(pf->access_type); if (xe_vma_is_cpu_addr_mirror(vma)) -- 2.43.0