Only set SIG_FLAG_REQUIRE_STREAM if signature inspects TCP.

src/detect-parse.c

@@ -1121,6 +1121,8 @@ static int SigValidate(Signature *s) {
         }
     }
 
+    /* TCP: pkt vs stream vs depth/offset */
+    if (s->proto.proto[IPPROTO_TCP / 8] & (1 << (IPPROTO_TCP % 8))) {
         if (!(s->flags & (SIG_FLAG_REQUIRE_PACKET | SIG_FLAG_REQUIRE_STREAM))) {
             s->flags |= SIG_FLAG_REQUIRE_STREAM;
             SigMatch *sm = s->sm_lists[DETECT_SM_LIST_PMATCH];
@@ -1134,6 +1136,7 @@ static int SigValidate(Signature *s) {
                 sm = sm->next;
             }
         }
+    }
 
 #ifdef DEBUG
     int i;