Initial commit

1 files changed, 31 insertions, 0 deletions

diff --git a/overflow.c b/overflow.c
new file mode 100644
index 0000000..1a01984
--- /dev/null
+++ b/overflow.c
@@ -0,0 +1,31 @@
+/**
+ * 27-08-2012 buffer overflow exercise
+ * gcc -fstack-protector-all -D_FORTIFY_SOURCE=2 -O2 -Wall -g overflow.c -o overflow
+ */
+#include <stdio.h>
+#include <stdlib.h>
+
+void g() {
+	static int j = 0;
+	printf("Call %u\n", ++j);
+}
+void bye() {
+	puts("Last call - ciao");
+	exit(42);
+}
+
+void f() {
+	unsigned int i;
+	void * x[0];
+	scanf("%u", &i);
+	puts("From f()");
+	x[++i] = bye;
+	while (i--)
+		x[i] = g;
+	printf("Stuff: %p\n", x);
+}
+
+int main() {
+	f();
+	return 0;
+}