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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 C2DE3C32754 for ; Fri, 2 Aug 2019 17:03:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9B45620644 for ; Fri, 2 Aug 2019 17:03:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403888AbfHBRDj (ORCPT ); Fri, 2 Aug 2019 13:03:39 -0400 Received: from foss.arm.com ([217.140.110.172]:55084 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403887AbfHBRDj (ORCPT ); Fri, 2 Aug 2019 13:03:39 -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 E62341597; Fri, 2 Aug 2019 10:03:38 -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 25B243F575; Fri, 2 Aug 2019 10:03:38 -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 Subject: [PATCH v3 08/11] kselftest: arm64: fake_sigreturn_missing_fpsimd Date: Fri, 2 Aug 2019 18:02:57 +0100 Message-Id: <20190802170300.20662-9-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190802170300.20662-1-cristian.marussi@arm.com> References: <20190802170300.20662-1-cristian.marussi@arm.com> Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Added a simple fake_sigreturn testcase which builds a ucontext_t without the required fpsimd_context and place it onto the stack. Expects a SIGSEGV on test PASS. Signed-off-by: Cristian Marussi --- .../arm64/signal/testcases/.gitignore | 1 + .../testcases/fake_sigreturn_missing_fpsimd.c | 44 +++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore index cf2a73599818..17d1c5e73319 100644 --- a/tools/testing/selftests/arm64/signal/testcases/.gitignore +++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore @@ -6,3 +6,4 @@ mangle_pstate_invalid_mode_el3 mangle_pstate_ssbs_regs fake_sigreturn_bad_magic fake_sigreturn_bad_size_for_magic0 +fake_sigreturn_missing_fpsimd diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c new file mode 100644 index 000000000000..b8dd57ce6844 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2019 ARM Limited */ + +#include +#include + +#include "test_signals_utils.h" +#include "testcases.h" + +struct fake_sigframe sf; + +static int fake_sigreturn_missing_fpsimd_run(struct tdescr *td, + siginfo_t *si, ucontext_t *uc) +{ + size_t resv_sz, offset; + 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; + + resv_sz = GET_SF_RESV_SIZE(sf); + head = get_header(head, FPSIMD_MAGIC, resv_sz, &offset); + /* just give up and timeout if still not enough space */ + if (head && resv_sz - offset >= HDR_SZ) { + fprintf(stderr, "Mangling template header. Spare space:%zd\n", + resv_sz - offset); + /* Just overwrite fpsmid_context */ + write_terminator_record(head); + + ASSERT_BAD_CONTEXT(&sf.uc); + fake_sigreturn(&sf, sizeof(sf), 16); + } + + return 1; +} + +struct tdescr tde = { + .name = "FAKE_SIGRETURN_MISSING_FPSIMD", + .descr = "Triggers a fake sigreturn with a sigframe missing the mandatory fpsimd_context", + .sig_ok = SIGSEGV, + .timeout = 3, + .run = fake_sigreturn_missing_fpsimd_run, +}; -- 2.17.1