From: Olivier Houchard <ohouchard@haproxy.com>
Date: Tue, 21 Aug 2018 13:59:43 +0000 (+0200)
Subject: BUG/MEDIUM: stream-int: Check if the conn_stream exist in si_cs_io_cb.
X-Git-Tag: v1.9-dev2~137
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a6ff03577017848e1246cbca985060fae97f43b3;p=thirdparty%2Fhaproxy.git

BUG/MEDIUM: stream-int: Check if the conn_stream exist in si_cs_io_cb.

It is possible that the conn_stream gets detached from the stream_interface,
and as it subscribed to the wait list, si_cs_io_cb() gets called anyway,
so make sure we have a conn_stream before attempting to send more data.

This is 1.9-specific, no backport is needed.
---

diff --git a/src/stream_interface.c b/src/stream_interface.c
index 4b5b760c85..52aa7c43d1 100644
--- a/src/stream_interface.c
+++ b/src/stream_interface.c
@@ -760,8 +760,12 @@ wake_others:
 struct task *si_cs_io_cb(struct task *t, void *ctx, unsigned short state)
 {
 	struct stream_interface *si = ctx;
+	struct conn_stream *cs = objt_cs(si->end);
+
+	if (!cs)
+		return NULL;
 	if (!(si->wait_list.wait_reason & SUB_CAN_SEND))
-		si_cs_send(__objt_cs(si->end));
+		si_cs_send(cs);
 	return (NULL);
 }