From patchwork Fri Oct 25 17:57:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 11212861 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 9A41913BD for ; Fri, 25 Oct 2019 17:58:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 801E3222BD for ; Fri, 25 Oct 2019 17:58:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730947AbfJYR6X (ORCPT ); Fri, 25 Oct 2019 13:58:23 -0400 Received: from foss.arm.com ([217.140.110.172]:43970 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730835AbfJYR6X (ORCPT ); Fri, 25 Oct 2019 13:58:23 -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 8A269492; Fri, 25 Oct 2019 10:58:22 -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 878123F6C4; Fri, 25 Oct 2019 10:58:21 -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, suzuki.poulose@arm.com Subject: [PATCH v10 10/12] kselftest: arm64: fake_sigreturn_duplicated_fpsimd Date: Fri, 25 Oct 2019 18:57:15 +0100 Message-Id: <20191025175717.15154-11-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191025175717.15154-1-cristian.marussi@arm.com> References: <20191025175717.15154-1-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 an anomalous additional fpsimd_context and place it onto the stack. Expects a SIGSEGV on test PASS. Reviewed-by: Dave Martin Signed-off-by: Cristian Marussi --- v6 --> v7 - fixed typo v5 --> v6 - removed unneeded locals - avoid timeout on failure v3 --> v4 - fix commit - missing include - using new get_starting_head() helper - added test description --- .../fake_sigreturn_duplicated_fpsimd.c | 50 +++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c new file mode 100644 index 000000000000..afe8915f0998 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Place a fake sigframe on the stack including an additional FPSIMD + * 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_duplicated_fpsimd_run(struct tdescr *td, + siginfo_t *si, ucontext_t *uc) +{ + 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; + + head = get_starting_head(shead, sizeof(struct fpsimd_context) + HDR_SZ, + GET_SF_RESV_SIZE(sf), NULL); + if (!head) + return 0; + + /* Add a spurious fpsimd_context */ + head->magic = FPSIMD_MAGIC; + head->size = sizeof(struct fpsimd_context); + /* and terminate */ + write_terminator_record(GET_RESV_NEXT_HEAD(head)); + + ASSERT_BAD_CONTEXT(&sf.uc); + fake_sigreturn(&sf, sizeof(sf), 0); + + return 1; +} + +struct tdescr tde = { + .name = "FAKE_SIGRETURN_DUPLICATED_FPSIMD", + .descr = "Triggers a sigreturn including two fpsimd_context", + .sig_ok = SIGSEGV, + .timeout = 3, + .run = fake_sigreturn_duplicated_fpsimd_run, +};