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 v8 03/12] kselftest: arm64: mangle_pstate_invalid_daif_bits
Date: Wed, 9 Oct 2019 09:26:02 +0100 [thread overview]
Message-ID: <20191009082611.9441-4-cristian.marussi@arm.com> (raw)
In-Reply-To: <20191009082611.9441-1-cristian.marussi@arm.com>
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.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
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
next prev parent reply other threads:[~2019-10-09 8:26 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 8:25 [PATCH v8 00/12] Add arm64/signal initial kselftest support Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 01/12] kselftest: arm64: extend toplevel skeleton Makefile Cristian Marussi
2019-10-09 11:15 ` Dave Martin
2019-10-09 11:52 ` Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 02/12] kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils Cristian Marussi
2019-10-09 11:18 ` Dave Martin
2019-10-09 11:55 ` Cristian Marussi
2019-10-09 8:26 ` Cristian Marussi [this message]
2019-10-09 8:26 ` [PATCH v8 04/12] kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 05/12] kselftest: arm64: extend test_init functionalities Cristian Marussi
2019-10-09 11:32 ` Dave Martin
2019-10-09 11:57 ` Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 06/12] kselftest: arm64: add helper get_current_context Cristian Marussi
2019-10-09 11:32 ` Dave Martin
2019-10-09 11:57 ` Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 07/12] kselftest: arm64: fake_sigreturn_bad_magic Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 08/12] kselftest: arm64: fake_sigreturn_bad_size_for_magic0 Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 09/12] kselftest: arm64: fake_sigreturn_missing_fpsimd Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 10/12] kselftest: arm64: fake_sigreturn_duplicated_fpsimd Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 11/12] kselftest: arm64: fake_sigreturn_bad_size Cristian Marussi
2019-10-09 8:26 ` [PATCH v8 12/12] kselftest: arm64: fake_sigreturn_misaligned_sp Cristian Marussi
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