remove more null bytes

ROPgadget/ropgadget/ropchain/arch/ropmakerx86.py

@@ -132,6 +132,9 @@ class ROPMakerX86(object):
         if dataAddr % 2 == 0:
             dataAddr += 1
 
+        dataAddrStr = f"{dataAddr:08x}".replace("00", "01")
+        dataAddr = int(dataAddrStr, 16)
+
         print(f"dataAddr = 0x{dataAddr:08x}")
 
         # prepend padding

autoRop.py

@@ -113,3 +113,4 @@ if run:
     print()
     print(f"[ Run Program : ./{exec_file} {rop_file} ]")
     os.execv(exec_file, [exec_file, rop_file])
+    

vuln-programs/null-data-addr/Makefile

@@ -1,2 +1,2 @@
 null-data-addr: null-data-addr.c
-	gcc -fno-stack-protector -m32 -static $^ -o $@ -Tdata 0x080d9100
+	gcc -fno-stack-protector -m32 -static $^ -o $@ -Tdata 0x080f0000