From: Cristian Marussi <cristian.marussi@arm.com>
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 v5 04/11] kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht]
Date: Mon, 2 Sep 2019 12:29:25 +0100
Message-ID: <20190902112932.36129-5-cristian.marussi@arm.com> (raw)
In-Reply-To: <20190902112932.36129-1-cristian.marussi@arm.com>
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.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
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
next prev parent reply index
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 11:29 [PATCH v5 00/11] Add arm64/signal initial kselftest support Cristian Marussi
2019-09-02 11:29 ` [PATCH v5 01/11] kselftest: arm64: add skeleton Makefile Cristian Marussi
2019-09-03 9:26 ` Amit Kachhap
2019-09-03 9:45 ` Cristian Marussi
2019-09-05 17:57 ` Cristian Marussi
2019-09-09 12:42 ` Amit Kachhap
2019-09-16 11:41 ` Dave Martin
2019-09-04 11:47 ` Dave Martin
2019-09-05 13:45 ` Cristian Marussi
2019-09-05 14:18 ` Dave Martin
2019-09-02 11:29 ` [PATCH v5 02/11] kselftest: arm64: add common utils and one testcase Cristian Marussi
2019-09-04 11:47 ` Dave Martin
2019-09-06 10:26 ` Cristian Marussi
2019-09-16 11:40 ` Dave Martin
2019-09-02 11:29 ` [PATCH v5 03/11] kselftest: arm64: mangle_pstate_invalid_daif_bits Cristian Marussi
2019-09-04 11:48 ` Dave Martin
2019-09-02 11:29 ` Cristian Marussi [this message]
2019-09-04 11:48 ` [PATCH v5 04/11] kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] Dave Martin
2019-09-02 11:29 ` [PATCH v5 05/11] kselftest: arm64: mangle_pstate_ssbs_regs Cristian Marussi
2019-09-04 11:48 ` Dave Martin
2019-09-09 15:51 ` Cristian Marussi
2019-09-02 11:29 ` [PATCH v5 06/11] kselftest: arm64: fake_sigreturn_bad_magic Cristian Marussi
2019-09-04 11:48 ` Dave Martin
2019-09-09 17:31 ` Cristian Marussi
2019-09-02 11:29 ` [PATCH v5 07/11] kselftest: arm64: fake_sigreturn_bad_size_for_magic0 Cristian Marussi
2019-09-04 11:49 ` Dave Martin
2019-09-09 17:47 ` Cristian Marussi
2019-09-02 11:29 ` [PATCH v5 08/11] kselftest: arm64: fake_sigreturn_missing_fpsimd Cristian Marussi
2019-09-04 11:49 ` Dave Martin
2019-09-09 17:51 ` Cristian Marussi
2019-09-02 11:29 ` [PATCH v5 09/11] kselftest: arm64: fake_sigreturn_duplicated_fpsimd Cristian Marussi
2019-09-04 11:49 ` Dave Martin
2019-09-05 12:15 ` Cristian Marussi
2019-09-05 12:39 ` Dave Martin
2019-09-05 13:32 ` Cristian Marussi
2019-09-05 14:20 ` Dave Martin
2019-09-09 18:03 ` Cristian Marussi
2019-09-02 11:29 ` [PATCH v5 10/11] kselftest: arm64: fake_sigreturn_bad_size Cristian Marussi
2019-09-04 11:49 ` Dave Martin
2019-09-09 18:11 ` Cristian Marussi
2019-09-02 11:29 ` [PATCH v5 11/11] kselftest: arm64: fake_sigreturn_misaligned_sp Cristian Marussi
2019-09-04 11:49 ` Dave Martin
2019-09-09 18:32 ` Cristian Marussi
2019-09-04 11:47 ` [PATCH v5 00/11] Add arm64/signal initial kselftest support Dave Martin
2019-09-10 12:25 ` Cristian Marussi
2019-09-16 12:14 ` Dave Martin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190902112932.36129-5-cristian.marussi@arm.com \
--to=cristian.marussi@arm.com \
--cc=amit.kachhap@arm.com \
--cc=andreyknvl@google.com \
--cc=dave.martin@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=shuah@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Linux-kselftest Archive on lore.kernel.org
Archives are clonable:
git clone --mirror https://lore.kernel.org/linux-kselftest/0 linux-kselftest/git/0.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 linux-kselftest linux-kselftest/ https://lore.kernel.org/linux-kselftest \
linux-kselftest@vger.kernel.org
public-inbox-index linux-kselftest
Example config snippet for mirrors
Newsgroup available over NNTP:
nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kselftest
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git