fix(mem/mpu): remove extra memory being mapped

Initally, when mapping and copying, the destination region was being
created with the same size of the original region, instead of the size of
the data being copied

Signed-off-by: Miguel Silva <[email protected]>

Author: miguelafsilva5

src/core/mpu/mem.c

@@ -614,10 +614,16 @@ vaddr_t mem_map_cpy(struct addr_space* ass, struct addr_space* asd, vaddr_t vas,
         mpr = mpe->region;
         spin_unlock(&ass->lock);
 
-        if (mem_map(asd, &mpr, true)) {
-            va_res = vas;
+        if (num_pages * PAGE_SIZE > mpr.size) {
+            va_res = INVALID_VA;
         } else {
-            INFO("failed mem map on mem map cpy");
+            mpr.size = num_pages * PAGE_SIZE;
+            bool broadcast = mem_broadcast(asd, &mpr, true);
+            if (mem_map(asd, &mpr, broadcast, false)) {
+                va_res = vas;
+            } else {
+                INFO("failed mem map on mem map cpy");
+            }
         }
     } else {
         INFO("failed mem map cpy");