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 1A285D0E6D9 for ; Mon, 21 Oct 2024 09:59:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D301210E472; Mon, 21 Oct 2024 09:59:11 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="JRVM4bs1"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id 219C910E472 for ; Mon, 21 Oct 2024 09:59:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1729504750; x=1761040750; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=rUzyA3P4vP0uX+BpZXtAn2TK5cH1yOHoe+GT7tEPTbg=; b=JRVM4bs1aR30Y1SnSOWIKbb+vu2fUvMeCdsd69xLHF4y2S8nrnljlDhN 0G8lVUJJJKGwMclICOyMXlBFAlE9Px13JRo5HktztA/nt4bogZEKYESKa tlH+vXSz+ylbfaqs/N8ekgA0cbHiZCekGvrEjJBXwwHiRGEDRrXoEyMXS 0D8sWsTs2MEnx2bKun73CgdtPjtzrxgK3ogi3mOu62DRgkGT6QaWgnI6I caYJNc7/UfCD/+ggonhG5MA47gm1AGUdMxGk/UTmSGTDWCZLmqZ0VwAqE 7m3oHfphHFmglXIyNE4KCbspFp26Jp1qsdfIg9kailGJpJAnsu22+KKmN A==; X-CSE-ConnectionGUID: obNBJh1uTUebkhudUAFNbA== X-CSE-MsgGUID: VKPqzmgUTuC+4nfvJobAqA== X-IronPort-AV: E=McAfee;i="6700,10204,11231"; a="40350741" X-IronPort-AV: E=Sophos;i="6.11,220,1725346800"; d="scan'208";a="40350741" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Oct 2024 02:59:10 -0700 X-CSE-ConnectionGUID: wBrHVExRR0S21/xJp7naNA== X-CSE-MsgGUID: Heg5579NS3aPvS0ncASQ4w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,220,1725346800"; d="scan'208";a="84545985" Received: from jkrzyszt-mobl2.ger.corp.intel.com (HELO rapter.intel.com) ([10.245.246.221]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Oct 2024 02:59:07 -0700 From: Gwan-gyeong Mun To: intel-xe@lists.freedesktop.org Cc: nirmoy.das@intel.com, matthew.brost@intel.com, stuart.summers@intel.com, christoph.manszewski@intel.com, mika.kuoppala@linux.intel.com, dominik.grzegorzek@intel.com, andrzej.hajda@intel.com, maciej.patelczyk@intel.com Subject: [RFC 01/19] ptrace: export ptrace_may_access Date: Mon, 21 Oct 2024 12:58:40 +0300 Message-ID: <20241021095904.439555-2-gwan-gyeong.mun@intel.com> X-Mailer: git-send-email 2.46.1 In-Reply-To: <20241021095904.439555-1-gwan-gyeong.mun@intel.com> References: <20241021095904.439555-1-gwan-gyeong.mun@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" From: Mika Kuoppala xe driver would like to allow fine grained access control for GDB debugger using ptrace. Without this export, the only option would be to check for CAP_SYS_ADMIN. The check intended for an ioctl to attach a GPU debugger is similar to the ptrace use case: allow a calling process to manipulate a target process if it has the necessary capabilities or the same permissions, as described in Documentation/process/adding-syscalls.rst. Export ptrace_may_access function to allow GPU debugger to have identical access control for debugger(s) as a CPU debugger. v2: proper commit message (Lucas) Cc: Oleg Nesterov Cc: linux-kernel@vger.kernel.org Cc: Dave Airlie CC: Lucas De Marchi Cc: Matthew Brost CC: Andi Shyti Cc: Joonas Lahtinen CC: Maciej Patelczyk Cc: Dominik Grzegorzek Signed-off-by: Mika Kuoppala Signed-off-by: Jonathan Cavitt Reviewed-by: Andi Shyti Signed-off-by: Gwan-gyeong Mun --- kernel/ptrace.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/ptrace.c b/kernel/ptrace.c index d5f89f9ef29f..86be1805ebd8 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -354,6 +354,7 @@ bool ptrace_may_access(struct task_struct *task, unsigned int mode) task_unlock(task); return !err; } +EXPORT_SYMBOL_GPL(ptrace_may_access); static int check_ptrace_options(unsigned long data) { -- 2.46.1