From: Frédéric Lécaille <flecaille@haproxy.com>
Date: Wed, 2 Jun 2021 15:40:09 +0000 (+0200)
Subject: BUG/MINOR: quic: Missing cases treatement when updating ACK ranges
X-Git-Tag: v2.5-dev8~127
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ba4276d131d4e5201d73bcb988654cd82d3b922;p=thirdparty%2Fhaproxy.git

BUG/MINOR: quic: Missing cases treatement when updating ACK ranges

Let's say that we have to insert a range R between to others A and B
with A->first <= R->first <= B->first. We have to remove the ranges
which are overlapsed by R during. This was correctly done when
the intersection between A and R was not empty, but not when the
intersection between R and B was not empty. If this latter case
after having inserting a new range R we set <new> variable as the
node to consider to check the overlaping between R and its following
ranges.
---

diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index 847f4d30da..0337558693 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -2341,6 +2341,8 @@ int quic_update_ack_ranges_list(struct quic_arngs *arngs,
 			new_node = quic_insert_new_range(arngs, ar);
 			if (!new_node)
 				return 0;
+
+			new = &new_node->first;
 		}
 	}