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 28BD5C32750 for ; Fri, 2 Aug 2019 17:03:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 08E3921726 for ; Fri, 2 Aug 2019 17:03:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391167AbfHBRDf (ORCPT ); Fri, 2 Aug 2019 13:03:35 -0400 Received: from foss.arm.com ([217.140.110.172]:55044 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388317AbfHBRDf (ORCPT ); Fri, 2 Aug 2019 13:03:35 -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 E486515AB; Fri, 2 Aug 2019 10:03:34 -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 240B23F575; Fri, 2 Aug 2019 10:03:34 -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 Subject: [PATCH v3 04/11] kselftest: arm64: mangle_pstate_invalid_mode_el Date: Fri, 2 Aug 2019 18:02:53 +0100 Message-Id: <20190802170300.20662-5-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> Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org 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, +}; -- 2.17.1