From patchwork Wed Oct 9 12:04:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 11181083 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 6D4AA1575 for ; Wed, 9 Oct 2019 12:05:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2D89C21835 for ; Wed, 9 Oct 2019 12:05:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="t7bg5432" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D89C21835 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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=l0izSQ3G/5niOmyl43asrbpv5iHU7H8DK2/KH4akhf0=; b=t7bg5432rYOsw5a2eZvPkveEyb iCcfdLi3fw+4EhcZCTiQpfY191QJX/0L2XdeyhCP/Y28l/YnZTFRXwmo0zEzQXTy/IvtwDR05F6We m9I4mJchENulYNFmPUXVkTah45AgTI9846tdVCu968aMS/NdLU0u1c8lG/Mqpch7FfEFiE/IHRS3P MzWZGKdutUYS+pueXVFamwCyhNheLMgxbRSlLxUzFR2lNoXnfclPRztzpMmJTmq1v1284p8hGwPlZ IYQFAEmmSEZ02daaMFepHbGEnnnmBMQfgqDo0t8qbOTFoYqUoCZ18Rnwmbdex3+XN68BL0nAN8Lqi M+pqkrBQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iIAiU-0008Gw-JK; Wed, 09 Oct 2019 12:05:18 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iIAiP-0007cO-5l for linux-arm-kernel@lists.infradead.org; Wed, 09 Oct 2019 12:05:16 +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 A9D4815BE; Wed, 9 Oct 2019 05:05:12 -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 C22243F703; Wed, 9 Oct 2019 05:05:11 -0700 (PDT) From: Cristian Marussi To: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org Subject: [PATCH v9 03/12] kselftest: arm64: mangle_pstate_invalid_daif_bits Date: Wed, 9 Oct 2019 13:04:50 +0100 Message-Id: <20191009120459.21805-4-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191009120459.21805-1-cristian.marussi@arm.com> References: <20191009120459.21805-1-cristian.marussi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191009_050513_257379_9EFD92AD X-CRM114-Status: GOOD ( 11.22 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 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: amit.kachhap@arm.com, 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 Add a simple mangle testcase which messes with the ucontext_t from within the signal handler, trying to set PSTATE DAIF bits to an invalid value (masking everything). Expects SIGSEGV on test PASS. Reviewed-by: Dave Martin Signed-off-by: Cristian Marussi --- v3 --> v4 - fixed commit message - added testcase comment description --- .../mangle_pstate_invalid_daif_bits.c | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c new file mode 100644 index 000000000000..434b82597007 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, mangling the + * DAIF bits in an illegal manner: this attempt must be spotted by Kernel + * and the test case is expected to be terminated via SEGV. + * + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +static int mangle_invalid_pstate_run(struct tdescr *td, siginfo_t *si, + ucontext_t *uc) +{ + ASSERT_GOOD_CONTEXT(uc); + + /* + * This config should trigger a SIGSEGV by Kernel when it checks + * the sigframe consistency in valid_user_regs() routine. + */ + uc->uc_mcontext.pstate |= PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT; + + return 1; +} + +struct tdescr tde = { + .sanity_disabled = true, + .name = "MANGLE_PSTATE_INVALID_DAIF_BITS", + .descr = "Mangling uc_mcontext with INVALID DAIF_BITS", + .sig_trig = SIGUSR1, + .sig_ok = SIGSEGV, + .run = mangle_invalid_pstate_run, +};