From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Mon, 2 Nov 2015 22:51:04 +0000 (-0500)
Subject: Fix: Check for NULL hash tables on relay daemon teardown
X-Git-Tag: v2.8.0-rc1~235
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=ce3f3ba3aee62c0a317b448c2f19578ab7f057e4;p=lttng-tools.git

Fix: Check for NULL hash tables on relay daemon teardown

The relay daemon will log any "leaked" object on exit. However,
some errors encountered early-on during the daemon's
initialization may result in the teardown being executed with
uninitialized hash tables.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-relayd/session.c b/src/bin/lttng-relayd/session.c
index 7fffea8af..d1c2098f8 100644
--- a/src/bin/lttng-relayd/session.c
+++ b/src/bin/lttng-relayd/session.c
@@ -230,6 +230,10 @@ void print_sessions(void)
 	struct lttng_ht_iter iter;
 	struct relay_session *session;
 
+	if (!sessions_ht) {
+		return;
+	}
+
 	rcu_read_lock();
 	cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session,
 			session_n.node) {
diff --git a/src/bin/lttng-relayd/stream.c b/src/bin/lttng-relayd/stream.c
index cbd7ceb88..335a1cf5f 100644
--- a/src/bin/lttng-relayd/stream.c
+++ b/src/bin/lttng-relayd/stream.c
@@ -446,6 +446,10 @@ void print_relay_streams(void)
 	struct lttng_ht_iter iter;
 	struct relay_stream *stream;
 
+	if (!relay_streams_ht) {
+		return;
+	}
+
 	rcu_read_lock();
 	cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream,
 			node.node) {
diff --git a/src/bin/lttng-relayd/viewer-stream.c b/src/bin/lttng-relayd/viewer-stream.c
index 623f94ca7..7c59cd05d 100644
--- a/src/bin/lttng-relayd/viewer-stream.c
+++ b/src/bin/lttng-relayd/viewer-stream.c
@@ -338,6 +338,10 @@ void print_viewer_streams(void)
 	struct lttng_ht_iter iter;
 	struct relay_viewer_stream *vstream;
 
+	if (!viewer_streams_ht) {
+		return;
+	}
+
 	rcu_read_lock();
 	cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, vstream,
 			stream_n.node) {