stack smashing

userland/c/smash_stack.c

@@ -0,0 +1,17 @@
+/* https://cirosantilli.com/linux-kernel-module-cheat#stack-smashing */
+
+void myfunc(char *const src, int len) {
+    int i;
+    for (i = 0; i < len; ++i) {
+        src[i] = 42;
+    }
+}
+
+int main(void) {
+    char arr[] = {'a', 'b', 'c', 'd'};
+    int len = sizeof(arr);
+    myfunc(arr, len);
+    myfunc(arr, len + 1);
+    myfunc(arr, len);
+    return 0;
+}