dnp3: avoids DOS by too long loop over null-sized objects

diff --git a/scripts/dnp3-gen/dnp3-gen.py b/scripts/dnp3-gen/dnp3-gen.py
index ae2fef7baa898d8a7fedd21ed4a3daf888f34c69..0396b6d5c654635fe0ba04ab3d651a04ecd9af16 100755 (executable)
--- a/scripts/dnp3-gen/dnp3-gen.py
+++ b/scripts/dnp3-gen/dnp3-gen.py
@@ -437,6 +437,9 @@ static int DNP3DecodeObjectG{{object.group}}V{{object.variation}}(const uint8_t
 {% endfor %}
 {% endif %}
 
+    if (*len < count/8) {
+        goto error;
+    }
     while (count--) {
 
         object = SCCalloc(1, sizeof(*object));