overflow errors

src/input.c

@@ -158,10 +158,13 @@ char *editorPrompt(char *prompt, char *placeHolder, char bPathMode) {
     } else if (!iscntrl(c) && c < 256) {
       if (buf_len == buf_size - 1) {
         buf_size *= 2;
-        buf = realloc(buf, buf_size);
+        char *new_buf = realloc(buf, buf_size);
+        if (!new_buf) {
+          free(buf);
+          return NULL;
+        }
+        buf = new_buf;
       }
-      buf[buf_len++] = (char)c;
-      buf[buf_len] = '\0';
     }
   }
 }