Update README.md

README.md

@@ -7,3 +7,16 @@ This is a collection of tools I build to help having fun with the linux kernel.
 
 *   [kernel-pwn-nexus](https://github.com/xairy/linux-kernel-exploitation)
 *   [code-browser](https://elixir.bootlin.com/linux/latest/source)
+
+
+## Challenges
+
+* 34c3 esprfs
+    *   [GitHub](https://github.com/bkth/34c3ctf/tree/master/esprfs)
+*  pwnable.kr
+    *   syscall
+    *   exynos
+    *   rootkit
+    *   kcrc
+    *   softmmu
+    *   towelroot