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 X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8932C433E6 for ; Wed, 10 Mar 2021 03:09:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AF36B64DA3 for ; Wed, 10 Mar 2021 03:09:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232108AbhCJDJT (ORCPT ); Tue, 9 Mar 2021 22:09:19 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:60910 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231894AbhCJDJH (ORCPT ); Tue, 9 Mar 2021 22:09:07 -0500 Received: from [50.53.41.238] (helo=[192.168.192.153]) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1lJpDe-0002FI-DM; Wed, 10 Mar 2021 03:09:06 +0000 Subject: Re: [RFC PATCH 1/4] lsm: separate security_task_getsecid() into subjective and objective variants To: Paul Moore Cc: Casey Schaufler , linux-security-module@vger.kernel.org, selinux@vger.kernel.org, linux-audit@redhat.com References: <161377712068.87807.12246856567527156637.stgit@sifl> <161377734508.87807.8537642254664217815.stgit@sifl> From: John Johansen Autocrypt: addr=john.johansen@canonical.com; prefer-encrypt=mutual; keydata= LS0tLS1CRUdJTiBQR1AgUFVCTElDIEtFWSBCTE9DSy0tLS0tCgptUUlOQkU1bXJQb0JFQURB azE5UHNnVmdCS2tJbW1SMmlzUFE2bzdLSmhUVEtqSmR3VmJrV1NuTm4rbzZVcDVrCm5LUDFm NDlFQlFsY2VXZzF5cC9Od2JSOGFkK2VTRU8vdW1hL0srUHFXdkJwdEtDOVNXRDk3Rkc0dUI0 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credentials. This turns out to be unfortunate as most of the hook's >>>> callers seem to expect the task's subjective credentials, although >>>> a small handful of callers do correctly expect the objective >>>> credentials. >>>> >>>> This patch is the first step towards fixing the problem: it splits >>>> the existing security_task_getsecid() hook into two variants, one >>>> for the subjective creds, one for the objective creds. >>>> >>>> void security_task_getsecid_subj(struct task_struct *p, >>>> u32 *secid); >>>> void security_task_getsecid_obj(struct task_struct *p, >>>> u32 *secid); >>>> >>>> While this patch does fix all of the callers to use the correct >>>> variant, in order to keep this patch focused on the callers and to >>>> ease review, the LSMs continue to use the same implementation for >>>> both hooks. The net effect is that this patch should not change >>>> the behavior of the kernel in any way, it will be up to the latter >>>> LSM specific patches in this series to change the hook >>>> implementations and return the correct credentials. >>>> >>>> Signed-off-by: Paul Moore >>> >>> So far this looks good. I want to take another stab at it and give >>> it some testing >> >> Checking in as I know you said you needed to fix/release the AppArmor >> patch in this series ... is this patch still looking okay to you? If >> so, can I get an ACK at least on this patch? > > Hi John, > > Any objections if I merge the LSM, SELinux, and Smack patches into the > selinux/next tree so that we can start getting some wider testing? If > I leave out my poor attempt at an AppArmor patch, the current in-tree > AppArmor code should behave exactly as it does today with the > apparmor_task_getsecid() function handling both the subjective and > objective creds. I can always merge the AppArmor patch later when you > have it ready, or you can merge it via your AppArmor tree at a later > date. > I have some questions around selinux and binder but I don't have any objections to you merging, we can always drop fixes on top if they are necessary