commit d63b85da9b7a3dff7ce1361e038ee114f41481fb
author Willy Tarreau <w@1wt.eu> Thu Oct 31 15:10:03 2019 +0100
committer Christopher Faulet <cfaulet@haproxy.com> Wed Nov 06 11:04:26 2019 +0100
tree 73f8e060d4741b557db65afc00b6cdd5deb563a7
parent 72c48ce7f0e5a8811148c46b557032cbd4bb76d3

BUG/MEDIUM: mux-h2: report no available stream on a connection having errors

If an H2 mux has met an error, we must not report available streams
anymore, or it risks to accumulate new streams while not being able
to process them.

This should be backported to 2.0 and 1.9.

(cherry picked from commit c61966f9b468b72528f854f4bc64bb5934751384)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>

src/mux_h2.c

diff --git a/src/mux_h2.c b/src/mux_h2.c
index 8116df4..2b87a52 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -507,6 +507,9 @@
 	if (h2c->last_sid >= 0)
 		return 0;
 
+	if (h2c->st0 >= H2_CS_ERROR)
+		return 0;
+
 	/* note: may be negative if a SETTINGS frame changes the limit */
 	ret1 = h2c->streams_limit - h2c->nb_streams;