1 files changed, 26 insertions, 0 deletions

diff --git a/include/linux/stackleak.h b/include/linux/stackleak.h
new file mode 100644
index 000000000000..628c2b947b89
--- /dev/null
+++ b/include/linux/stackleak.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_STACKLEAK_H
+#define _LINUX_STACKLEAK_H
+
+#include <linux/sched.h>
+#include <linux/sched/task_stack.h>
+
+/*
+ * Check that the poison value points to the unused hole in the
+ * virtual memory map for your platform.
+ */
+#define STACKLEAK_POISON -0xBEEF
+#define STACKLEAK_SEARCH_DEPTH 128
+
+#ifdef CONFIG_GCC_PLUGIN_STACKLEAK
+#include <asm/stacktrace.h>
+
+static inline void stackleak_task_init(struct task_struct *t)
+{
+        t->lowest_stack = (unsigned long)end_of_stack(t) + sizeof(unsigned long);
+}
+#else /* !CONFIG_GCC_PLUGIN_STACKLEAK */
+static inline void stackleak_task_init(struct task_struct *t) { }
+#endif
+
+#endif