From: Amaury Denoyelle <adenoyelle@haproxy.com>
Date: Wed, 19 Nov 2025 10:40:40 +0000 (+0100)
Subject: BUG/MINOR: quic: do not decrement jobs for backend conns
X-Git-Tag: v3.3-dev14~35
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=46c5c232d72e9c2f193f654bc5b7529e02441fce;p=thirdparty%2Fhaproxy.git

BUG/MINOR: quic: do not decrement jobs for backend conns

jobs is a global counter which serves to account activity through the
whole process. Soft-stop procedure will wait until this counter is
resetted to the nul value.

jobs is not used for backend connections. Thus, it is not incremented
when a QUIC backend connection is instantiated as expected. However,
decrement is performed on all sides during quic_conn_release(). This
causes the counter wrapping.

Fix this by decrementing jobs only for frontend connections. Without
this patch, soft stop procedure will hang indefinitely if QUIC backend
connections were in use.
---

diff --git a/src/quic_conn.c b/src/quic_conn.c
index 12532594a..2a82484d7 100644
--- a/src/quic_conn.c
+++ b/src/quic_conn.c
@@ -1554,7 +1554,7 @@ int quic_conn_release(struct quic_conn *qc)
 		ret = 1;
 	}
 
-	if (qc_test_fd(qc))
+	if (!qc_is_back(qc) && qc_test_fd(qc))
 		_HA_ATOMIC_DEC(&jobs);
 
 	/* Close quic-conn socket fd. */