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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 776E2C2B9F4 for ; Mon, 28 Jun 2021 13:25:18 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8B36D61A1D for ; Mon, 28 Jun 2021 13:25:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8B36D61A1D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=weissschuh.net Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=linux-audit-bounces@redhat.com Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-6-yd7vdKtQMw-ZxKprcwRKbQ-1; Mon, 28 Jun 2021 09:25:14 -0400 X-MC-Unique: yd7vdKtQMw-ZxKprcwRKbQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DE6AC19067E3; Mon, 28 Jun 2021 13:25:11 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8DA365C1CF; Mon, 28 Jun 2021 13:25:11 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 461A64EA2A; Mon, 28 Jun 2021 13:25:10 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 15S7djRv030881 for ; Mon, 28 Jun 2021 03:39:46 -0400 Received: by smtp.corp.redhat.com (Postfix) id 3FA7921602A7; Mon, 28 Jun 2021 07:39:45 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast02.extmail.prod.ext.rdu2.redhat.com [10.11.55.18]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3AE1421602A5 for ; Mon, 28 Jun 2021 07:39:41 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AA4E6800B28 for ; Mon, 28 Jun 2021 07:39:41 +0000 (UTC) Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-81-t5zCwFnTOb2a3dU342qBJA-1; Mon, 28 Jun 2021 03:39:39 -0400 X-MC-Unique: t5zCwFnTOb2a3dU342qBJA-1 Date: Mon, 28 Jun 2021 09:31:53 +0200 From: Thomas =?utf-8?Q?Wei=C3=9Fschuh?= To: linux-audit@redhat.com, bpf@vger.kernel.org Subject: AUDIT_ARCH_ and __NR_syscall constants for seccomp filters Message-ID: <0b926f59-464d-4b67-8f32-329cf9695cf7@t-8ch.de> MIME-Version: 1.0 X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-loop: linux-audit@redhat.com X-Mailman-Approved-At: Mon, 28 Jun 2021 09:25:08 -0400 X-BeenThere: linux-audit@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Linux Audit Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-audit-bounces@redhat.com Errors-To: linux-audit-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=linux-audit-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi everyone, there does not seem to be a way to access the AUDIT_ARCH_ constant that matches the currently visible syscall numbers (__NR_...) from the kernel uapi headers. Background: I am writing a seccomp BPF filter using the syscall constants to get the correct syscall numbers for the target architecture. seccomp_filter.rst tells users to always check the arch values. But there does not seem a way to get the correct AUDIT_ARCH_ value from the kernel headers. Questions: Is it really necessary to validate the arch value when syscall numbers are already target-specific? (If not, should this be added to the docs?) Would it make sense to expose the audit arch matching the syscall numbers in the uapi headers? Link to the actual BPF code: https://github.com/t-8ch/qmk_firmware/blob/optimize-udev/util/udev/qmk_id.c#L154 Thanks, Thomas -- Linux-audit mailing list Linux-audit@redhat.com https://listman.redhat.com/mailman/listinfo/linux-audit