From patchwork Thu Jun 13 11:13:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 10992311 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 24BAE13AD for ; Thu, 13 Jun 2019 15:30:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1471E22376 for ; Thu, 13 Jun 2019 15:30:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 08C802228E; Thu, 13 Jun 2019 15:30:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9CE2E209CD for ; Thu, 13 Jun 2019 15:30:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728239AbfFMPa3 (ORCPT ); Thu, 13 Jun 2019 11:30:29 -0400 Received: from foss.arm.com ([217.140.110.172]:38182 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728795AbfFMLOq (ORCPT ); Thu, 13 Jun 2019 07:14:46 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5F9B0367; Thu, 13 Jun 2019 04:14:45 -0700 (PDT) Received: from e120937-lin.cambridge.arm.com (e120937-lin.cambridge.arm.com [10.1.197.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E5CA03F694; Thu, 13 Jun 2019 04:16:27 -0700 (PDT) From: Cristian Marussi To: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org Cc: dave.martin@arm.com, andreyknvl@google.com Subject: [PATCH 12/13] kselftest: arm64: fake_sigreturn_bad_size_for_magic0 Date: Thu, 13 Jun 2019 12:13:34 +0100 Message-Id: <20190613111335.7645-13-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190613111335.7645-1-cristian.marussi@arm.com> References: <20190613111335.7645-1-cristian.marussi@arm.com> Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Added a simple fake_sigreturn testcase which builds a ucontext_t with a badly sized magic0 header and place it onto the stack. Expects a SIGSEGV on test PASS. Signed-off-by: Cristian Marussi --- .../arm64/signal/testcases/.gitignore | 1 + .../fake_sigreturn_bad_size_for_magic0.c | 44 +++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore index 9ad1735e0018..66ba865b3b7e 100644 --- a/tools/testing/selftests/arm64/signal/testcases/.gitignore +++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore @@ -9,3 +9,4 @@ mangle_pstate_ssbs_regs fake_sigreturn_misaligned fake_sigreturn_bad_magic fake_sigreturn_bad_size +fake_sigreturn_bad_size_for_magic0 diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c new file mode 100644 index 000000000000..703909959473 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2019 ARM Limited */ + +#include +#include +#include + +#include "test_signals_utils.h" +#include "testcases.h" + +struct a_sigframe sf; + +static int fake_sigreturn_bad_size_for_magic0_run(struct tdescr *td, + siginfo_t *si, ucontext_t *uc) +{ + struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf); + + /* just to fill the ucontext_t with something real */ + if (!get_current_context(td, &sf.uc)) + return 1; + + /* + * Jump to the free slot...we must preserve existing + * magics like fpsimd in order no to SEGV anyway + */ + head = get_terminator(head, GET_SF_RESV_SIZE(sf), NULL); + if (head) { + head->magic = 0; + head->size = 256; + + ASSERT_BAD_CONTEXT(&sf.uc); + fake_sigreturn(&sf, sizeof(sf), 16); + } + + return 1; +} + +struct tdescr tde = { + .name = "FAKE_SIGRETURN_BAD_SIZE_FOR_MAGIC0", + .descr = "Triggers a fake sigreturn with a sigframe including a bad non-zero size magic0", + .sig_ok = SIGSEGV, + .timeout = 3, + .run = fake_sigreturn_bad_size_for_magic0_run, +};