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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 v9 10/12] kselftest: arm64: fake_sigreturn_duplicated_fpsimd
Date: Wed,  9 Oct 2019 13:04:57 +0100	[thread overview]
Message-ID: <20191009120459.21805-11-cristian.marussi@arm.com> (raw)
In-Reply-To: <20191009120459.21805-1-cristian.marussi@arm.com>

Add a simple fake_sigreturn testcase which builds a ucontext_t with
an anomalous additional fpsimd_context and place it onto the stack.
Expects a SIGSEGV on test PASS.

Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
v6 --> v7
- fixed typo
v5 --> v6
- removed unneeded locals
- avoid timeout on failure
v3 --> v4
- fix commit
- missing include
- using new get_starting_head() helper
- added test description
---
 .../fake_sigreturn_duplicated_fpsimd.c        | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c

diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c
new file mode 100644
index 000000000000..afe8915f0998
--- /dev/null
+++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 ARM Limited
+ *
+ * Place a fake sigframe on the stack including an additional FPSIMD
+ * record: on sigreturn Kernel must spot this attempt and the test
+ * case is expected to be terminated via SEGV.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct fake_sigframe sf;
+
+static int fake_sigreturn_duplicated_fpsimd_run(struct tdescr *td,
+						siginfo_t *si, ucontext_t *uc)
+{
+	struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head;
+
+	/* just to fill the ucontext_t with something real */
+	if (!get_current_context(td, &sf.uc))
+		return 1;
+
+	head = get_starting_head(shead, sizeof(struct fpsimd_context) + HDR_SZ,
+				 GET_SF_RESV_SIZE(sf), NULL);
+	if (!head)
+		return 0;
+
+	/* Add a spurious fpsimd_context */
+	head->magic = FPSIMD_MAGIC;
+	head->size = sizeof(struct fpsimd_context);
+	/* and terminate */
+	write_terminator_record(GET_RESV_NEXT_HEAD(head));
+
+	ASSERT_BAD_CONTEXT(&sf.uc);
+	fake_sigreturn(&sf, sizeof(sf), 0);
+
+	return 1;
+}
+
+struct tdescr tde = {
+		.name = "FAKE_SIGRETURN_DUPLICATED_FPSIMD",
+		.descr = "Triggers a sigreturn including two fpsimd_context",
+		.sig_ok = SIGSEGV,
+		.timeout = 3,
+		.run = fake_sigreturn_duplicated_fpsimd_run,
+};
-- 
2.17.1


  parent reply	other threads:[~2019-10-09 12:05 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-09 12:04 [PATCH v9 00/12] Add arm64/signal initial kselftest support Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 01/12] kselftest: arm64: extend toplevel skeleton Makefile Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 02/12] kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils Cristian Marussi
2019-10-24 22:41   ` Suzuki K Poulose
2019-10-25  9:56     ` Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 03/12] kselftest: arm64: mangle_pstate_invalid_daif_bits Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 04/12] kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 05/12] kselftest: arm64: extend test_init functionalities Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 06/12] kselftest: arm64: add helper get_current_context Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 07/12] kselftest: arm64: fake_sigreturn_bad_magic Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 08/12] kselftest: arm64: fake_sigreturn_bad_size_for_magic0 Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 09/12] kselftest: arm64: fake_sigreturn_missing_fpsimd Cristian Marussi
2019-10-09 12:04 ` Cristian Marussi [this message]
2019-10-09 12:04 ` [PATCH v9 11/12] kselftest: arm64: fake_sigreturn_bad_size Cristian Marussi
2019-10-09 12:04 ` [PATCH v9 12/12] kselftest: arm64: fake_sigreturn_misaligned_sp Cristian Marussi

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