add max component

headers/computorv1.h

@@ -13,7 +13,9 @@
  */
 
 #define DOUBLE_PRECISION 0.00001
-#define MAX_EXPONENT 1000
+// maximum exponent supported to avoid excessive variable-length stack allocation (VLA),
+// which can lead to stack overflows, segmentation faults, and potential denial-of-service (DoS)
+#define MAX_EXPONENT 1024
 
 /** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  * MAIN.C

src/launcher.c

@@ -62,6 +62,8 @@ static int get_number_of_exponents(s_term *terms, int max_exponent)
     int i;
     int nbr_of_exponent;
 
+    if (max_exponent <= 0 || max_exponent > MAX_EXPONENT)
+        stop_errors("max_exponent should be between 0 and %d, but got : %d\n", MAX_EXPONENT, max_exponent);
     int exponent_present[max_exponent];
     ft_bzero(exponent_present, sizeof(exponent_present));
 

src/parser.c

@@ -194,7 +194,7 @@ static int get_exponent(s_token *tokens, int i, int *token_count)
         ret_exponent = 0;
     }
 
-    // check if exponent is not too big, to avoid overflow when calculating power
+    // check if exponent is not too big
     if (ret_exponent > MAX_EXPONENT)
     {
         stop_errors("exponent is too big (max supported exponent is %d), got : %d\n", MAX_EXPONENT, ret_exponent);