add some safety checks to enet_packet_resize

lsalzman · Jun 29, 2024 · 0b924c7 · 0b924c7
1 parent 7083138
commit 0b924c7
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/packet.c b/packet.c
@@ -89,9 +89,14 @@ enet_packet_resize (ENetPacket * packet, size_t dataLength)
     if (newData == NULL)
       return -1;
 
-    memcpy (newData, packet -> data, packet -> dataLength);
-    enet_free (packet -> data);
-
+    if (packet -> data != NULL)
+    {
+       if (packet -> dataLength > 0)
+         memcpy (newData, packet -> data, packet -> dataLength);
+
+       enet_free (packet -> data);
+    }
+
     packet -> data = newData;
     packet -> dataLength = dataLength;