scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 120 insertions, 0 deletions

diff --git a/security/selinux/ima.c b/security/selinux/ima.c
new file mode 100644
index 000000000..aa34da9b0
--- /dev/null
+++ b/security/selinux/ima.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 Microsoft Corporation
+ *
+ * Author: Lakshmi Ramasubramanian (nramas@linux.microsoft.com)
+ *
+ * Measure critical data structures maintained by SELinux
+ * using IMA subsystem.
+ */
+#include <linux/vmalloc.h>
+#include <linux/ima.h>
+#include "security.h"
+#include "ima.h"
+
+/*
+ * selinux_ima_collect_state - Read selinux configuration settings
+ *
+ * On success returns the configuration settings string.
+ * On error, returns NULL.
+ */
+static char *selinux_ima_collect_state(void)
+{
+	const char *on = "=1;", *off = "=0;";
+	char *buf;
+	int buf_len, len, i, rc;
+
+	buf_len = strlen("initialized=0;enforcing=0;checkreqprot=0;") + 1;
+
+	len = strlen(on);
+	for (i = 0; i < __POLICYDB_CAP_MAX; i++)
+		buf_len += strlen(selinux_policycap_names[i]) + len;
+
+	buf = kzalloc(buf_len, GFP_KERNEL);
+	if (!buf)
+		return NULL;
+
+	rc = strscpy(buf, "initialized", buf_len);
+	WARN_ON(rc < 0);
+
+	rc = strlcat(buf, selinux_initialized() ? on : off, buf_len);
+	WARN_ON(rc >= buf_len);
+
+	rc = strlcat(buf, "enforcing", buf_len);
+	WARN_ON(rc >= buf_len);
+
+	rc = strlcat(buf, enforcing_enabled() ? on : off, buf_len);
+	WARN_ON(rc >= buf_len);
+
+	rc = strlcat(buf, "checkreqprot", buf_len);
+	WARN_ON(rc >= buf_len);
+
+	rc = strlcat(buf, checkreqprot_get() ? on : off, buf_len);
+	WARN_ON(rc >= buf_len);
+
+	for (i = 0; i < __POLICYDB_CAP_MAX; i++) {
+		rc = strlcat(buf, selinux_policycap_names[i], buf_len);
+		WARN_ON(rc >= buf_len);
+
+		rc = strlcat(buf, selinux_state.policycap[i] ? on : off,
+			buf_len);
+		WARN_ON(rc >= buf_len);
+	}
+
+	return buf;
+}
+
+/*
+ * selinux_ima_measure_state_locked - Measure SELinux state and hash of policy
+ */
+void selinux_ima_measure_state_locked(void)
+{
+	char *state_str = NULL;
+	void *policy = NULL;
+	size_t policy_len;
+	int rc = 0;
+
+	lockdep_assert_held(&selinux_state.policy_mutex);
+
+	state_str = selinux_ima_collect_state();
+	if (!state_str) {
+		pr_err("SELinux: %s: failed to read state.\n", __func__);
+		return;
+	}
+
+	ima_measure_critical_data("selinux", "selinux-state",
+				  state_str, strlen(state_str), false,
+				  NULL, 0);
+
+	kfree(state_str);
+
+	/*
+	 * Measure SELinux policy only after initialization is completed.
+	 */
+	if (!selinux_initialized())
+		return;
+
+	rc = security_read_state_kernel(&policy, &policy_len);
+	if (rc) {
+		pr_err("SELinux: %s: failed to read policy %d.\n", __func__, rc);
+		return;
+	}
+
+	ima_measure_critical_data("selinux", "selinux-policy-hash",
+				  policy, policy_len, true,
+				  NULL, 0);
+
+	vfree(policy);
+}
+
+/*
+ * selinux_ima_measure_state - Measure SELinux state and hash of policy
+ */
+void selinux_ima_measure_state(void)
+{
+	lockdep_assert_not_held(&selinux_state.policy_mutex);
+
+	mutex_lock(&selinux_state.policy_mutex);
+	selinux_ima_measure_state_locked();
+	mutex_unlock(&selinux_state.policy_mutex);
+}