vuln1 test

src/machine-vuln1.c

@@ -57,6 +57,8 @@ unsigned int count = 0; /* counts number of instructions executed so far */
 static void machine_init(void){
   memory = malloc(sizeof(int32_t)*MEMORY_SIZE);
   regs = malloc(sizeof(int32_t)*NUM_REGS);
+
+  /* memset can be vulnerable - changes to this can result in dirty memory to be read*/
   memset(memory,0,sizeof(int32_t)*MEMORY_SIZE);
   memset(regs,0,sizeof(int32_t)*NUM_REGS);
   count = 0;
@@ -84,15 +86,12 @@ static void do_mult(unsigned int dest, unsigned int src1, unsigned int src2)
 }
 
 /* returns 0 on success, nonzero on failure */
+/*CHANGE - Divide by Zero now possible*/
 static int do_div(unsigned int dest, unsigned int src1, unsigned int src2)
 {
-  if (regs[src2] == 0){
-    return -1;
-  }else{
     regs[dest] = regs[src1] / regs[src2];
     return 0;
 }
-}
 
 /* returns 0 on success, nonzero on failure */
 static int do_load(unsigned int dest, unsigned int src, int32_t offs){

src/machine-vuln2.c

@@ -84,15 +84,12 @@ static void do_mult(unsigned int dest, unsigned int src1, unsigned int src2)
 }
 
 /* returns 0 on success, nonzero on failure */
+/* CHANGE - removed safety for the divide by zero */
 static int do_div(unsigned int dest, unsigned int src1, unsigned int src2)
 {
-  if (regs[src2] == 0){
-    return -1;
-  }else{
     regs[dest] = regs[src1] / regs[src2];
     return 0;
 }
-}
 
 /* returns 0 on success, nonzero on failure */
 static int do_load(unsigned int dest, unsigned int src, int32_t offs){