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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 165A8ECE596 for ; Mon, 7 Oct 2019 18:30:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E0ECE2070B for ; Mon, 7 Oct 2019 18:30:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729358AbfJGSaT (ORCPT ); Mon, 7 Oct 2019 14:30:19 -0400 Received: from foss.arm.com ([217.140.110.172]:44072 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728187AbfJGSaT (ORCPT ); Mon, 7 Oct 2019 14:30:19 -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 C1DC415AB; Mon, 7 Oct 2019 11:30:18 -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 DA2633F68E; Mon, 7 Oct 2019 11:30:17 -0700 (PDT) From: Cristian Marussi To: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shuah@kernel.org Cc: andreyknvl@google.com, dave.martin@arm.com, amit.kachhap@arm.com Subject: [PATCH v7 04/11] kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] Date: Mon, 7 Oct 2019 19:29:47 +0100 Message-Id: <20191007182954.25730-5-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191007182954.25730-1-cristian.marussi@arm.com> References: <20191007182954.25730-1-cristian.marussi@arm.com> Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add 6 simple mangle testcases that mess with the ucontext_t from within the signal handler, trying to toggle PSTATE mode bits to trick the system into switching to EL1/EL2/EL3 using both SP_EL0(t) and SP_ELx(h). Expects SIGSEGV on test PASS. Reviewed-by: Dave Martin Signed-off-by: Cristian Marussi --- v3 --> v4 - fixed commit message - macroization - splitted into 6 macro-ised testcases to address t/h SP selection modes - added test description --- .../mangle_pstate_invalid_mode_el1h.c | 15 ++++++++++ .../mangle_pstate_invalid_mode_el1t.c | 15 ++++++++++ .../mangle_pstate_invalid_mode_el2h.c | 15 ++++++++++ .../mangle_pstate_invalid_mode_el2t.c | 15 ++++++++++ .../mangle_pstate_invalid_mode_el3h.c | 15 ++++++++++ .../mangle_pstate_invalid_mode_el3t.c | 15 ++++++++++ .../mangle_pstate_invalid_mode_template.h | 28 +++++++++++++++++++ 7 files changed, 118 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_template.h diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1h.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1h.c new file mode 100644 index 000000000000..95f821abdf46 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1h.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, toggling + * the mode bit to escalate exception level: this attempt must be spotted + * by Kernel and the test case is expected to be termninated via SEGV. + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +#include "mangle_pstate_invalid_mode_template.h" + +DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(1h); diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1t.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1t.c new file mode 100644 index 000000000000..cc222d8a618a --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1t.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, toggling + * the mode bit to escalate exception level: this attempt must be spotted + * by Kernel and the test case is expected to be termninated via SEGV. + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +#include "mangle_pstate_invalid_mode_template.h" + +DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(1t); diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2h.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2h.c new file mode 100644 index 000000000000..2188add7d28c --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2h.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, toggling + * the mode bit to escalate exception level: this attempt must be spotted + * by Kernel and the test case is expected to be termninated via SEGV. + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +#include "mangle_pstate_invalid_mode_template.h" + +DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(2h); diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2t.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2t.c new file mode 100644 index 000000000000..df32dd5a479c --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2t.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, toggling + * the mode bit to escalate exception level: this attempt must be spotted + * by Kernel and the test case is expected to be termninated via SEGV. + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +#include "mangle_pstate_invalid_mode_template.h" + +DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(2t); diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3h.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3h.c new file mode 100644 index 000000000000..9e6829b7e5db --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3h.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, toggling + * the mode bit to escalate exception level: this attempt must be spotted + * by Kernel and the test case is expected to be termninated via SEGV. + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +#include "mangle_pstate_invalid_mode_template.h" + +DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(3h); diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3t.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3t.c new file mode 100644 index 000000000000..5685a4f10d06 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3t.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 ARM Limited + * + * Try to mangle the ucontext from inside a signal handler, toggling + * the mode bit to escalate exception level: this attempt must be spotted + * by Kernel and the test case is expected to be termninated via SEGV. + */ + +#include "test_signals_utils.h" +#include "testcases.h" + +#include "mangle_pstate_invalid_mode_template.h" + +DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(3t); diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_template.h b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_template.h new file mode 100644 index 000000000000..f5bf1804d858 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_template.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2019 ARM Limited + * + * Utility macro to ease definition of testcases toggling mode EL + */ + +#define DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(_mode) \ + \ +static int mangle_invalid_pstate_run(struct tdescr *td, siginfo_t *si, \ + ucontext_t *uc) \ +{ \ + ASSERT_GOOD_CONTEXT(uc); \ + \ + uc->uc_mcontext.pstate &= ~PSR_MODE_MASK; \ + uc->uc_mcontext.pstate |= PSR_MODE_EL ## _mode; \ + \ + return 1; \ +} \ + \ +struct tdescr tde = { \ + .sanity_disabled = true, \ + .name = "MANGLE_PSTATE_INVALID_MODE_EL"#_mode, \ + .descr = "Mangling uc_mcontext INVALID MODE EL"#_mode, \ + .sig_trig = SIGUSR1, \ + .sig_ok = SIGSEGV, \ + .run = mangle_invalid_pstate_run, \ +} -- 2.17.1