From patchwork Thu Jun 13 11:13:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 10991595 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 B32921515 for ; Thu, 13 Jun 2019 11:18:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9C55C28AB9 for ; Thu, 13 Jun 2019 11:18:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8BAFC28A94; Thu, 13 Jun 2019 11:18:23 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 115A028A94 for ; Thu, 13 Jun 2019 11:18:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=0fRz0Qq9q5hbZYca0Na311CYV5pOSDomUGZYIjLVs9A=; b=pSAGHsQnDpTEPZnfS1ONJZv0zY s35NXEPgxUPb6WjU6qBUcG0ubswOyblbRJMkyPsqBkmq/XvkB7ZitHOlY4n7Pqk83gE7ot8rRmUWa fzhoYmfPnE1HouybRVtRVBQiC4GqTD3znNJjBal7i42ZX6sUepTWmwuzlLx6TNPykBLA+531BrRQ1 1SjN81OXRH2GNC5RHhpAkmmnAwZ8pyu03GMkumsl2P+XV5jTmD1l2D6hWXwxrji+9ji9NHV1yHKoh Ra6eGS6GxPTSjZ1zZM10RuE++M8HFOaKpcUsq+20nWOEZi/fyicrOARa3YNvhL04qRmiW7I+UexKT hQEIxGgA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbNkG-0004TG-M9; Thu, 13 Jun 2019 11:18:16 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbNgt-0007o5-Pk for linux-arm-kernel@lists.infradead.org; Thu, 13 Jun 2019 11:14:50 +0000 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 683FF3EF; Thu, 13 Jun 2019 04:14:47 -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 ED7583F694; Thu, 13 Jun 2019 04:16:29 -0700 (PDT) From: Cristian Marussi To: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org Subject: [PATCH 13/13] kselftest: arm64: fake_sigreturn_overflow_reserved Date: Thu, 13 Jun 2019 12:13:35 +0100 Message-Id: <20190613111335.7645-14-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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190613_041447_897700_413B0A2C X-CRM114-Status: GOOD ( 12.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: andreyknvl@google.com, dave.martin@arm.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Added a simple fake_sigreturn testcase which builds a ucontext_t with the whole __reserved area overflowed with ESR_MAGIC headers and place it onto the stack. Expects a SIGSEGV on test PASS. Signed-off-by: Cristian Marussi --- .../arm64/signal/testcases/.gitignore | 1 + .../fake_sigreturn_overflow_reserved.c | 48 +++++++++++++++++++ 2 files changed, 49 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_overflow_reserved.c diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore index 66ba865b3b7e..69a18391c220 100644 --- a/tools/testing/selftests/arm64/signal/testcases/.gitignore +++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore @@ -10,3 +10,4 @@ fake_sigreturn_misaligned fake_sigreturn_bad_magic fake_sigreturn_bad_size fake_sigreturn_bad_size_for_magic0 +fake_sigreturn_overflow_reserved diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_overflow_reserved.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_overflow_reserved.c new file mode 100644 index 000000000000..eba109453a65 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_overflow_reserved.c @@ -0,0 +1,48 @@ +/* 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_overflow_reserved_run(struct tdescr *td, + siginfo_t *si, + ucontext_t *uc) +{ + size_t offset = 0; + 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; + + /* find the terminator, preserving existig headers */ + head = get_terminator(head, GET_SF_RESV_SIZE(sf), &offset); + if (head) { + /* fill the __reserved area till the end */ + do { + head->magic = ESR_MAGIC; + head->size = sizeof(struct esr_context); + offset += head->size; + head = GET_RESV_NEXT_HEAD(head); + } while (offset < GET_SF_RESV_SIZE(sf)); + + ASSERT_BAD_CONTEXT(&sf.uc); + fake_sigreturn(&sf, sizeof(sf), 16); + } + + return 1; +} + +struct tdescr tde = { + .name = "FAKE_SIGRETURN_OVERFLOW_RESERVED", + .descr = "Triggers a fake sigreturn with an overflowed sigframe", + .sig_ok = SIGSEGV, + .timeout = 3, + .run = fake_sigreturn_overflow_reserved_run, +};