1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/misc/lkdtm/lkdtm.h b/drivers/misc/lkdtm/lkdtm.h
new file mode 100644
index 0000000000..015e048402
--- /dev/null
+++ b/drivers/misc/lkdtm/lkdtm.h
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LKDTM_H
+#define __LKDTM_H
+
+#define pr_fmt(fmt) "lkdtm: " fmt
+
+#include <linux/kernel.h>
+
+extern char *lkdtm_kernel_info;
+
+#define pr_expected_config(kconfig)				\
+do {								\
+	if (IS_ENABLED(kconfig)) 				\
+		pr_err("Unexpected! This %s was built with " #kconfig "=y\n", \
+			lkdtm_kernel_info);			\
+	else							\
+		pr_warn("This is probably expected, since this %s was built *without* " #kconfig "=y\n", \
+			lkdtm_kernel_info);			\
+} while (0)
+
+#ifndef MODULE
+int lkdtm_check_bool_cmdline(const char *param);
+#define pr_expected_config_param(kconfig, param)		\
+do {								\
+	if (IS_ENABLED(kconfig)) {				\
+		switch (lkdtm_check_bool_cmdline(param)) {	\
+		case 0:						\
+			pr_warn("This is probably expected, since this %s was built with " #kconfig "=y but booted with '" param "=N'\n", \
+				lkdtm_kernel_info);		\
+			break;					\
+		case 1:						\
+			pr_err("Unexpected! This %s was built with " #kconfig "=y and booted with '" param "=Y'\n", \
+				lkdtm_kernel_info);		\
+			break;					\
+		default:					\
+			pr_err("Unexpected! This %s was built with " #kconfig "=y (and booted without '" param "' specified)\n", \
+				lkdtm_kernel_info);		\
+		}						\
+	} else {						\
+		switch (lkdtm_check_bool_cmdline(param)) {	\
+		case 0:						\
+			pr_warn("This is probably expected, as this %s was built *without* " #kconfig "=y and booted with '" param "=N'\n", \
+				lkdtm_kernel_info);		\
+			break;					\
+		case 1:						\
+			pr_err("Unexpected! This %s was built *without* " #kconfig "=y but booted with '" param "=Y'\n", \
+				lkdtm_kernel_info);		\
+			break;					\
+		default:					\
+			pr_err("This is probably expected, since this %s was built *without* " #kconfig "=y (and booted without '" param "' specified)\n", \
+				lkdtm_kernel_info);		\
+			break;					\
+		}						\
+	}							\
+} while (0)
+#else
+#define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig)
+#endif
+
+/* Crash types. */
+struct crashtype {
+	const char *name;
+	void (*func)(void);
+};
+
+#define CRASHTYPE(_name)			\
+	{					\
+		.name = __stringify(_name),	\
+		.func = lkdtm_ ## _name,	\
+	}
+
+/* Category's collection of crashtypes. */
+struct crashtype_category {
+	struct crashtype *crashtypes;
+	size_t len;
+};
+
+/* Each category's crashtypes list. */
+extern struct crashtype_category bugs_crashtypes;
+extern struct crashtype_category heap_crashtypes;
+extern struct crashtype_category perms_crashtypes;
+extern struct crashtype_category refcount_crashtypes;
+extern struct crashtype_category usercopy_crashtypes;
+extern struct crashtype_category stackleak_crashtypes;
+extern struct crashtype_category cfi_crashtypes;
+extern struct crashtype_category fortify_crashtypes;
+extern struct crashtype_category powerpc_crashtypes;
+
+/* Each category's init/exit routines. */
+void __init lkdtm_bugs_init(int *recur_param);
+void __init lkdtm_heap_init(void);
+void __exit lkdtm_heap_exit(void);
+void __init lkdtm_perms_init(void);
+void __init lkdtm_usercopy_init(void);
+void __exit lkdtm_usercopy_exit(void);
+
+/* Special declaration for function-in-rodata. */
+void lkdtm_rodata_do_nothing(void);
+
+#endif