- Fix http2 drop handling to clear the postpone_drop state so that

other streams on the http2 session are not affected by a drop,
  and can clean up properly if also dropped. Fix http2 send reply
  so that when there is a send failure is does not recurse into
  the mesh functions and also does not drop the connection due to
  the condition of one stream.

doc/Changelog

@@ -1,3 +1,11 @@
+3 December 2025: Wouter
+	- Fix http2 drop handling to clear the postpone_drop state so that
+	  other streams on the http2 session are not affected by a drop,
+	  and can clean up properly if also dropped. Fix http2 send reply
+	  so that when there is a send failure is does not recurse into
+	  the mesh functions and also does not drop the connection due to
+	  the condition of one stream.
+
 2 December 2025: Wouter
 	- Fix to remove http2 stream mesh state when mesh new request is
 	  dropping the new request.

services/listen_dnsport.c

@@ -2884,6 +2884,7 @@ submit_http_error:
 	sldns_buffer_flip(h2_stream->qbuffer);
 	h2_session->postpone_drop = 1;
 	query_read_done = http2_query_read_done(h2_session, h2_stream);
+	h2_session->postpone_drop = 0;
 	if(query_read_done < 0)
 		return NGHTTP2_ERR_CALLBACK_FAILURE;
 	else if(!query_read_done) {
@@ -2893,11 +2894,9 @@ submit_http_error:
 			 * failure will result in reclaiming (and closing)
 			 * of comm point. */
 			verbose(VERB_QUERY, "http2 query dropped in worker cb");
-			h2_session->postpone_drop = 0;
 			return NGHTTP2_ERR_CALLBACK_FAILURE;
 		}
 		/* nothing to submit right now, query added to mesh. */
-		h2_session->postpone_drop = 0;
 		return 0;
 	}
 	if(!http2_submit_dns_response(h2_session)) {

util/netevent.c

@@ -6728,7 +6728,6 @@ comm_point_send_reply(struct comm_reply *repinfo)
 			tcp_req_info_send_reply(repinfo->c->tcp_req_info);
 		} else if(repinfo->c->use_h2) {
 			if(!http2_submit_dns_response(repinfo->c->h2_session)) {
-				comm_point_drop_reply(repinfo);
 				return;
 			}
 			repinfo->c->h2_stream = NULL;