From f8da73bd042f810f34d19f9eae02b46d870af394 Mon Sep 17 00:00:00 2001
From: James M Snell <jasnell@gmail.com>
Date: Sun, 19 Apr 2020 09:12:24 -0700
Subject: [PATCH] Earlier check for settings flood

---
 lib/nghttp2_session.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/nghttp2_session.c b/lib/nghttp2_session.c
index 415e3477..39f81f49 100644
--- a/lib/nghttp2_session.c
+++ b/lib/nghttp2_session.c
@@ -5653,6 +5653,12 @@ ssize_t nghttp2_session_mem_recv(nghttp2_session *session, const uint8_t *in,
           break;
         }
 
+        /* Check the settings flood counter early to be safe */
+        if (session->obq_flood_counter_ >= session->max_outbound_ack &&
+            !(iframe->frame.hd.flags & NGHTTP2_FLAG_ACK)) {
+          return NGHTTP2_ERR_FLOODED;
+        }
+
         iframe->state = NGHTTP2_IB_READ_SETTINGS;
 
         if (iframe->payloadleft) {