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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 AC421C43218 for ; Sat, 27 Apr 2019 15:17:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7E229206A3 for ; Sat, 27 Apr 2019 15:17:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727762AbfD0PPq (ORCPT ); Sat, 27 Apr 2019 11:15:46 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:33010 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727309AbfD0PPU (ORCPT ); Sat, 27 Apr 2019 11:15:20 -0400 Received: from [192.168.4.242] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hKP2s-00014C-3I; Sat, 27 Apr 2019 16:15:18 +0100 Received: from ben by deadeye with local (Exim 4.92) (envelope-from ) id 1hKP2o-0004fN-C3; Sat, 27 Apr 2019 16:15:14 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "John Johansen" Date: Sat, 27 Apr 2019 16:13:09 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 201/202] apparmor: provide userspace flag indicating binfmt_elf_mmap change In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.242 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.66-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: John Johansen commit 34c426acb75cc21bdf84685e106db0c1a3565057 upstream. Commit 9f834ec18def ("binfmt_elf: switch to new creds when switching to new mm") changed when the creds are installed by the binfmt_elf handler. This affects which creds are used to mmap the executable into the address space. Which can have an affect on apparmor policy. Add a flag to apparmor at /sys/kernel/security/apparmor/features/domain/fix_binfmt_elf_mmap to make it possible to detect this semantic change so that the userspace tools and the regression test suite can correctly deal with the change. BugLink: http://bugs.launchpad.net/bugs/1630069 Signed-off-by: John Johansen Signed-off-by: Ben Hutchings --- security/apparmor/apparmorfs.c | 1 + 1 file changed, 1 insertion(+) --- a/security/apparmor/apparmorfs.c +++ b/security/apparmor/apparmorfs.c @@ -794,6 +794,7 @@ static struct aa_fs_entry aa_fs_entry_do AA_FS_FILE_BOOLEAN("change_hatv", 1), AA_FS_FILE_BOOLEAN("change_onexec", 1), AA_FS_FILE_BOOLEAN("change_profile", 1), + AA_FS_FILE_BOOLEAN("fix_binfmt_elf_mmap", 1), { } };