From patchwork Wed Jul 3 16:35:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 11029875 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 E590C1398 for ; Wed, 3 Jul 2019 16:36:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D6E3328998 for ; Wed, 3 Jul 2019 16:36:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CB22B2899C; Wed, 3 Jul 2019 16:36:20 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 54B3E28998 for ; Wed, 3 Jul 2019 16:36:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727118AbfGCQgT (ORCPT ); Wed, 3 Jul 2019 12:36:19 -0400 Received: from foss.arm.com ([217.140.110.172]:52436 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726989AbfGCQgS (ORCPT ); Wed, 3 Jul 2019 12:36:18 -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 85D3C1500; Wed, 3 Jul 2019 09:36:17 -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 B900D3F718; Wed, 3 Jul 2019 09:36:16 -0700 (PDT) From: Cristian Marussi To: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org Cc: dave.martin@arm.com, andreyknvl@google.com Subject: [PATCH v2 04/10] kselftest: arm64: mangle_pstate_invalid_mode_el Date: Wed, 3 Jul 2019 17:35:26 +0100 Message-Id: <20190703163532.7485-5-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190703163532.7485-1-cristian.marussi@arm.com> References: <20190703163532.7485-1-cristian.marussi@arm.com> Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Added 3 simple mangle testcases that mess with the ucontext_t from within the sig_handler, trying to toggle PSTATE mode bits to trick the system into switching to EL1/EL2/EL3. Expects SIGSEGV on test PASS. Signed-off-by: Cristian Marussi --- .../arm64/signal/testcases/.gitignore | 3 ++ .../mangle_pstate_invalid_mode_el1.c | 29 +++++++++++++++++++ .../mangle_pstate_invalid_mode_el2.c | 29 +++++++++++++++++++ .../mangle_pstate_invalid_mode_el3.c | 29 +++++++++++++++++++ 4 files changed, 90 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3.c diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore index 8a0a29f0cc2a..226bb179b673 100644 --- a/tools/testing/selftests/arm64/signal/testcases/.gitignore +++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore @@ -1,2 +1,5 @@ mangle_pstate_invalid_compat_toggle mangle_pstate_invalid_daif_bits +mangle_pstate_invalid_mode_el1 +mangle_pstate_invalid_mode_el2 +mangle_pstate_invalid_mode_el3 diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c new file mode 100644 index 000000000000..07aed7624383 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2019 ARM Limited */ + +#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 checking valid_user_regs() + */ + uc->uc_mcontext.pstate &= ~PSR_MODE_MASK; + uc->uc_mcontext.pstate |= PSR_MODE_EL1t; + + return 1; +} + +struct tdescr tde = { + .sanity_disabled = true, + .name = "MANGLE_PSTATE_INVALID_MODE_EL1t", + .descr = "Mangling uc_mcontext with INVALID MODE EL1t", + .sig_trig = SIGUSR1, + .sig_ok = SIGSEGV, + .run = mangle_invalid_pstate_run, +}; diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2.c new file mode 100644 index 000000000000..0fe7f69efb33 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2.c @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2019 ARM Limited */ + +#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 checking valid_user_regs() + */ + uc->uc_mcontext.pstate &= ~PSR_MODE_MASK; + uc->uc_mcontext.pstate |= PSR_MODE_EL2t; + + return 1; +} + +struct tdescr tde = { + .sanity_disabled = true, + .name = "MANGLE_PSTATE_INVALID_MODE_EL2t", + .descr = "Mangling uc_mcontext with INVALID MODE EL2t", + .sig_trig = SIGUSR1, + .sig_ok = SIGSEGV, + .run = mangle_invalid_pstate_run, +}; diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3.c new file mode 100644 index 000000000000..61131dd6ca0c --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3.c @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2019 ARM Limited */ + +#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 checking valid_user_regs() + */ + uc->uc_mcontext.pstate &= ~PSR_MODE_MASK; + uc->uc_mcontext.pstate |= PSR_MODE_EL3t; + + return 1; +} + +struct tdescr tde = { + .sanity_disabled = true, + .name = "MANGLE_PSTATE_INVALID_MODE_EL3t", + .descr = "Mangling uc_mcontext with INVALID MODE EL3t", + .sig_trig = SIGUSR1, + .sig_ok = SIGSEGV, + .run = mangle_invalid_pstate_run, +};