From patchwork Fri Aug 2 17:02:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 11073967 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 A65C6746 for ; Fri, 2 Aug 2019 17:05:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 95113288BF for ; Fri, 2 Aug 2019 17:05:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 892B8288B6; Fri, 2 Aug 2019 17:05:10 +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=unavailable 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 28FD8288BE for ; Fri, 2 Aug 2019 17:05:10 +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=m8OMAVdC8UGeuJnzMe9RI/MUHsPose0k0mHPBQe9QCw=; b=P4K4jG1MqrXPh4f8hlh/9eUKKg B1WARDNtJtIxhQ3gaca/x8Cx4SD5WuEA1OpEW9QTMDFnPESBADDWCekyx36DqQXyN8O87WB7rLk1k Ar5KIU6sE69vhxPnuzDZ5Do5FRL2CNim2xXJSne2Ueq5mCTSgWA9U0NEGXzQYCJcWTdZLn4K2TmHL KJmPLNcaRAiL0QbLviTnX7lcvMV7CrKsfKLc75Vy+cw0sZKqN4KjPMmE4wnML6G2qUP9esMQSGQL1 8FPapd4mA9R7+f0wLZuyKNRyPzmhNwT3oiuRGD/hCZo0mfOrGZ64LuoCoN/Bj/2lFbry46imbEgQN AnyZvcqg==; 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 1htazN-0005GH-89; Fri, 02 Aug 2019 17:05:09 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1htaxw-0002Fv-2c for linux-arm-kernel@lists.infradead.org; Fri, 02 Aug 2019 17:03:41 +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 E69B015AB; Fri, 2 Aug 2019 10:03:39 -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 261C13F575; Fri, 2 Aug 2019 10:03:39 -0700 (PDT) From: Cristian Marussi To: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org Subject: [PATCH v3 09/11] kselftest: arm64: fake_sigreturn_duplicated_fpsimd Date: Fri, 2 Aug 2019 18:02:58 +0100 Message-Id: <20190802170300.20662-10-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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190802_100340_271978_F44CE0D3 X-CRM114-Status: GOOD ( 12.96 ) 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 an anomalous additional fpsimd_context and place it onto the stack. Expects a SIGSEGV on test PASS. Signed-off-by: Cristian Marussi --- .../arm64/signal/testcases/.gitignore | 1 + .../fake_sigreturn_duplicated_fpsimd.c | 62 +++++++++++++++++++ 2 files changed, 63 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore index 17d1c5e73319..94f9baaf638c 100644 --- a/tools/testing/selftests/arm64/signal/testcases/.gitignore +++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore @@ -7,3 +7,4 @@ mangle_pstate_ssbs_regs fake_sigreturn_bad_magic fake_sigreturn_bad_size_for_magic0 fake_sigreturn_missing_fpsimd +fake_sigreturn_duplicated_fpsimd 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..09af7a0f8776 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c @@ -0,0 +1,62 @@ +/* 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_duplicated_fpsimd_run(struct tdescr *td, + siginfo_t *si, ucontext_t *uc) +{ + size_t resv_sz, offset; + 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); + /* + * find the terminator, preserving existing headers + * and verify amount of spare room in __reserved area. + */ + head = get_terminator(shead, resv_sz, &offset); + /* + * try stripping extra_context header when low on space: + * we need at least space for one additional fpsimd_context + */ + if (head && resv_sz - offset < sizeof(struct fpsimd_context)) { + fprintf(stderr, "Low on space:%zd. Discarding extra_context.\n", + resv_sz - offset); + head = get_header(shead, EXTRA_MAGIC, resv_sz, &offset); + } + + /* just give up and timeout if still not enough space */ + if (head && + resv_sz - offset >= sizeof(struct fpsimd_context) + HDR_SZ) { + fprintf(stderr, "Mangling template header. Spare space:%zd\n", + resv_sz - offset); + /* Add a spurios 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), 16); + } + + return 1; +} + +struct tdescr tde = { + .name = "FAKE_SIGRETURN_DUPLICATED_FPSIMD", + .descr = "Triggers a fake sigreturn with a sigframe including two fpsimd_context", + .sig_ok = SIGSEGV, + .timeout = 3, + .run = fake_sigreturn_duplicated_fpsimd_run, +};