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=-8.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 1F8E3C3A5A7 for ; Wed, 4 Sep 2019 11:48:27 +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 E119020820 for ; Wed, 4 Sep 2019 11:48:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="f+6D3u/l" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E119020820 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+infradead-linux-arm-kernel=archiver.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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jRXXvF1td2AsuD/nd80wkN1jLtj0RiXZwjhiRvnFBlE=; b=f+6D3u/lEkw2c2 Qsd+E7oReu1TFz0yygn3SWyfff3DPNuTI7zRYGiYl0VcidPj+bjQO5Ci6t1syYQRTO7hZ3bnA2oQd 9ND32+7T0w22kj2EWiGONRVRH3HWSR5rELCSsmqx3+7pwr42aW+AzeQE16WMgBe/esqvXF0Wdd+q/ FdzTYUMh+fl+gLDpaH1tEUe5KFwXPF6HbH+M+6W9SsS76oGUwE6aiUuTKy4mLJfIxJ345N5CJTiuR 9FtASDV0T2b9X610LCOV7A6NED4dqvvqIyuP2NinUKmJ44EXTUYi1olSnb4fGzyy6Z+s/NkovFm98 L0sxyxeNJT6n7Vml8oig==; 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 1i5Tlt-0004Qd-Im; Wed, 04 Sep 2019 11:48:21 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i5Tle-0004Fk-MM for linux-arm-kernel@lists.infradead.org; Wed, 04 Sep 2019 11:48:08 +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 2B231337; Wed, 4 Sep 2019 04:48:06 -0700 (PDT) Received: from arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 43A983F246; Wed, 4 Sep 2019 04:48:05 -0700 (PDT) Date: Wed, 4 Sep 2019 12:48:03 +0100 From: Dave Martin To: Cristian Marussi Subject: Re: [PATCH v5 03/11] kselftest: arm64: mangle_pstate_invalid_daif_bits Message-ID: <20190904114803.GT27757@arm.com> References: <20190902112932.36129-1-cristian.marussi@arm.com> <20190902112932.36129-4-cristian.marussi@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190902112932.36129-4-cristian.marussi@arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190904_044807_002822_AE9694B6 X-CRM114-Status: GOOD ( 19.10 ) 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, shuah@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Sep 02, 2019 at 12:29:24pm +0100, Cristian Marussi wrote: > 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. > > Signed-off-by: Cristian Marussi Reviewed-by: Dave Martin > --- > 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, > +}; > -- > 2.17.1 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel