From patchwork Mon Sep 2 11:29:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 11126401 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CC53A1398 for ; Mon, 2 Sep 2019 11:30:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B611E21882 for ; Mon, 2 Sep 2019 11:30:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730110AbfIBLaC (ORCPT ); Mon, 2 Sep 2019 07:30:02 -0400 Received: from foss.arm.com ([217.140.110.172]:52540 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730098AbfIBLaC (ORCPT ); Mon, 2 Sep 2019 07:30:02 -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 64D70360; Mon, 2 Sep 2019 04:30:01 -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 6FE863F246; Mon, 2 Sep 2019 04:30:00 -0700 (PDT) From: Cristian Marussi To: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org Cc: andreyknvl@google.com, dave.martin@arm.com, amit.kachhap@arm.com Subject: [PATCH v5 07/11] kselftest: arm64: fake_sigreturn_bad_size_for_magic0 Date: Mon, 2 Sep 2019 12:29:28 +0100 Message-Id: <20190902112932.36129-8-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190902112932.36129-1-cristian.marussi@arm.com> References: <20190902112932.36129-1-cristian.marussi@arm.com> Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add a simple fake_sigreturn testcase which builds a ucontext_t with a badly sized terminator record and place it onto the stack. Expects a SIGSEGV on test PASS. Signed-off-by: Cristian Marussi Reviewed-by: Dave Martin --- v3 --> v4 - fix commit - add signal.h include - using new get_starting_head() helper - added test description --- .../fake_sigreturn_bad_size_for_magic0.c | 49 +++++++++++++++++++ 1 file changed, 49 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/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..25017fe18214 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Place a fake sigframe on the stack including a badly sized terminator + * record: on sigreturn Kernel must spot this attempt and the test case + * is expected to be terminated via SEGV. + */ + +#include +#include + +#include "test_signals_utils.h" +#include "testcases.h" + +struct fake_sigframe sf; + +static int fake_sigreturn_bad_size_for_magic0_run(struct tdescr *td, + siginfo_t *si, ucontext_t *uc) +{ + size_t resv_sz, need_sz; + struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head; + + /* just to fill the ucontext_t with something real */ + if (!get_current_context(td, &sf.uc)) + return 1; + + resv_sz = GET_SF_RESV_SIZE(sf); + /* at least HDR_SZ for the badly sized terminator. */ + need_sz = HDR_SZ; + head = get_starting_head(shead, need_sz, resv_sz, NULL); + if (head) { + head->magic = 0; + head->size = HDR_SZ; + + ASSERT_BAD_CONTEXT(&sf.uc); + fake_sigreturn(&sf, sizeof(sf), 0); + } + + return 1; +} + +struct tdescr tde = { + .name = "FAKE_SIGRETURN_BAD_SIZE_FOR_TERMINATOR", + .descr = "Trigger a sigreturn using non-zero size terminator", + .sig_ok = SIGSEGV, + .timeout = 3, + .run = fake_sigreturn_bad_size_for_magic0_run, +};