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=-16.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 2DE8FC43381 for ; Wed, 20 Mar 2019 14:52:56 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D3526206BA for ; Wed, 20 Mar 2019 14:52:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="qoeAL/PT" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D3526206BA Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 90F6A6B0003; Wed, 20 Mar 2019 10:52:52 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7AE116B0281; Wed, 20 Mar 2019 10:52:52 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5B4766B0282; Wed, 20 Mar 2019 10:52:52 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) by kanga.kvack.org (Postfix) with ESMTP id 1ED316B0003 for ; Wed, 20 Mar 2019 10:52:52 -0400 (EDT) Received: by mail-pg1-f198.google.com with SMTP id 14so2893230pgf.22 for ; Wed, 20 Mar 2019 07:52:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:in-reply-to:message-id :mime-version:references:subject:from:to:cc; bh=SY+rnApq6/oVhWiUcTCOnBf6TcIl5V0rPtZOMhbp5Gs=; b=jXi2jeYooV/qCSR4Qs1DXrgKH5u+8lvQy5Zlam/3NIS2N2UAJQ7x0nYN19O/QNzhpo 60Mkd10/VDEPQK8uIZ6vSGEugK0EnmmQ4KNRtmjMxfcAeqvUFEh4fwjJHyq2IHg3LQ8H HmTxPHSSewbPOsvNPBdoHFGiPX9q4FWLW9ygqI1hp49QP4Yr6Qy6658++Tk0c1rX1gJ1 qdnb0I1bmijiKeVcR+1towa0ina3EUIfg3UKwPgLQdk5wCZOfWaOHL6M96aRiXXyPKY1 WeaRULtoL9edilbEFSmWtZWcWzYPShhZsF0X4ZoZmMTsUxOIiolu9upMgt3px2FMy6Ku M/lg== X-Gm-Message-State: APjAAAVy84+tpySMUQesL9JaOJ8ldYm6YGSbbFbbYUNONhdBe8I0OcA8 SCzG1D/lwlEiAKhbjH0r6i5eT6poUdzAOti5A5hdN4rzIvO2GBKqLUK+ndOmZlrCT0wRSzBTyR3 fS0uFLujzpbrN4k/61f1TS7KfRVkX8eYSWDKghcYVhDVli0ESbDp+MoN1zTZHTLBddQ== X-Received: by 2002:a62:168a:: with SMTP id 132mr8463974pfw.155.1553093571619; Wed, 20 Mar 2019 07:52:51 -0700 (PDT) X-Received: by 2002:a62:168a:: with SMTP id 132mr8463908pfw.155.1553093570477; Wed, 20 Mar 2019 07:52:50 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1553093570; cv=none; d=google.com; s=arc-20160816; b=eB2KnjveIrFoXZ7okFYJ9FGE9kbg6KsAjIN5F+9EQFPAkGbAEUX03iNIiG+75WwpzT WUf6qT+XwzhNZpU7QfVjuOp6yIB4LHQb+52aW5n0k4FkqINAxWaOyMnPFouvCWS+dRrs lL/BLFNY3j2UaS/Z2r3gKYafvRk+PWw48cdX9wGs2N3qklNtbOKNIN7KU2vbzNfIJZC+ fMOtdy0GDQimwHdxq857n5VuGWyB995Mz3UZ1VRFtZUZjwpaSRaShyY8UYfQEqKuAVG3 nJxWOQJFHSMFYIUgTBLn8b6kTYYZmC7asPTedFifWXJzT5B3d9O3Ai6Hrh6fQ+pjVcYC ROWQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:dkim-signature; bh=SY+rnApq6/oVhWiUcTCOnBf6TcIl5V0rPtZOMhbp5Gs=; b=YsVCmbNiYT1JBcH+zP7b7m5Alf3kKjrpUKjVLs3IMi7WjXbHFlTjzRBhzxz8qHe3CM 6mrV+rLpmf/lXTGCUI6FwHb2W0qqeeGUBQLDcLLSOvu77pLAZw6PNKNuihyt7l9FsWvL jp/NsYsWCeiGyUxqilGXFiiWFiHGpb+UJtZhk1Bzp2/29dGqf7LzNx/TEU+vmOwjtqcw 7YTcCgcBYnxn1J4/UY2g+V92wxdvg0Gi8dVD3ZfdIb6OIfP9APoddqKzB39xjiGbLZ0u mkRi8W7cHsyjg6YvIaVNfu4KUcAXnrTNHiVaUVDKwA3PQrA1sbjzltRwPphBrnB+JmKq sejQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b="qoeAL/PT"; spf=pass (google.com: domain of 3wvosxaokcjw6j9naugjrhckkcha.8kihejqt-iigr68g.knc@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3wVOSXAoKCJw6J9NAUGJRHCKKCHA.8KIHEJQT-IIGR68G.KNC@flex--andreyknvl.bounces.google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from mail-sor-f73.google.com (mail-sor-f73.google.com. [209.85.220.73]) by mx.google.com with SMTPS id x8sor1330257pgi.26.2019.03.20.07.52.50 for (Google Transport Security); Wed, 20 Mar 2019 07:52:50 -0700 (PDT) Received-SPF: pass (google.com: domain of 3wvosxaokcjw6j9naugjrhckkcha.8kihejqt-iigr68g.knc@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) client-ip=209.85.220.73; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b="qoeAL/PT"; spf=pass (google.com: domain of 3wvosxaokcjw6j9naugjrhckkcha.8kihejqt-iigr68g.knc@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3wVOSXAoKCJw6J9NAUGJRHCKKCHA.8KIHEJQT-IIGR68G.KNC@flex--andreyknvl.bounces.google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=SY+rnApq6/oVhWiUcTCOnBf6TcIl5V0rPtZOMhbp5Gs=; b=qoeAL/PTMnTmhgXnl3RGCTw81JMF7TMbNpbYC6F1pr3TGPdCwVaIeU85uj/B77baMA VAfUOVehMewxrlPBnMcvR10msEYwYWF8Hf58msk5Kne+FBqRyuY30tbXpt8IkSkZrha9 BopC5S+Fs8co9IFKm2kvowWttr/p77PwwjO1CLveVN2yF4PwY74t43GhYeQZYNqL2hkb Lb66rbH+aemh2G4/5BTzrD1WRMcmhL2lokvByiGUsVSSzbRXBf7wNtl5qMTt1G6arf7d 2SGd6xj3du+G5dFYrDQjaku3ogveIBZkyDoiC7RnaR7D3ZV5QwX7GQmkBx2mnQVW5OQ5 WLOg== X-Google-Smtp-Source: APXvYqz6JBh3VPqVViw3H16uoW27hFqlC/o1l863wBn8e7Vx/uAhxhmqW+NafnSe+CxZM3eW2zA7LqhlL1qr07K2 X-Received: by 2002:a63:5117:: with SMTP id f23mr5792228pgb.3.1553093569898; Wed, 20 Mar 2019 07:52:49 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:34 +0100 In-Reply-To: Message-Id: <60757dd548eefd5cda129c73486dfac5e838084a.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v13 20/20] selftests, arm64: add a selftest for passing tagged pointers to kernel From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Alex Deucher , "=?UTF-8?q?Christian=20K=C3=B6nig?=" , "David (ChunMing) Zhou" , Yishai Hadas , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. This patch adds a simple test, that calls the uname syscall with a tagged user pointer as an argument. Without the kernel accepting tagged user pointers the test fails with EFAULT. Signed-off-by: Andrey Konovalov --- tools/testing/selftests/arm64/.gitignore | 1 + tools/testing/selftests/arm64/Makefile | 11 ++++++++++ .../testing/selftests/arm64/run_tags_test.sh | 12 +++++++++++ tools/testing/selftests/arm64/tags_test.c | 21 +++++++++++++++++++ 4 files changed, 45 insertions(+) create mode 100644 tools/testing/selftests/arm64/.gitignore create mode 100644 tools/testing/selftests/arm64/Makefile create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh create mode 100644 tools/testing/selftests/arm64/tags_test.c diff --git a/tools/testing/selftests/arm64/.gitignore b/tools/testing/selftests/arm64/.gitignore new file mode 100644 index 000000000000..e8fae8d61ed6 --- /dev/null +++ b/tools/testing/selftests/arm64/.gitignore @@ -0,0 +1 @@ +tags_test diff --git a/tools/testing/selftests/arm64/Makefile b/tools/testing/selftests/arm64/Makefile new file mode 100644 index 000000000000..a61b2e743e99 --- /dev/null +++ b/tools/testing/selftests/arm64/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 + +# ARCH can be overridden by the user for cross compiling +ARCH ?= $(shell uname -m 2>/dev/null || echo not) + +ifneq (,$(filter $(ARCH),aarch64 arm64)) +TEST_GEN_PROGS := tags_test +TEST_PROGS := run_tags_test.sh +endif + +include ../lib.mk diff --git a/tools/testing/selftests/arm64/run_tags_test.sh b/tools/testing/selftests/arm64/run_tags_test.sh new file mode 100755 index 000000000000..745f11379930 --- /dev/null +++ b/tools/testing/selftests/arm64/run_tags_test.sh @@ -0,0 +1,12 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +echo "--------------------" +echo "running tags test" +echo "--------------------" +./tags_test +if [ $? -ne 0 ]; then + echo "[FAIL]" +else + echo "[PASS]" +fi diff --git a/tools/testing/selftests/arm64/tags_test.c b/tools/testing/selftests/arm64/tags_test.c new file mode 100644 index 000000000000..2bd1830a7ebe --- /dev/null +++ b/tools/testing/selftests/arm64/tags_test.c @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include + +#define SHIFT_TAG(tag) ((uint64_t)(tag) << 56) +#define SET_TAG(ptr, tag) (((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \ + SHIFT_TAG(tag)) + +int main(void) +{ + struct utsname *ptr = (struct utsname *)malloc(sizeof(*ptr)); + void *tagged_ptr = (void *)SET_TAG(ptr, 0x42); + int err = uname(tagged_ptr); + + free(ptr); + return err; +} -- 2.21.0.225.g810b269d1ac-goog