From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Wed, 14 Feb 2018 20:24:40 +0000 (-0500)
Subject: Fix: send_channel_monitor_pipe does not take the consumer socket lock
X-Git-Tag: v2.10.3~15
X-Git-Url: http://git.liburcu.org/?p=lttng-tools.git;a=commitdiff_plain;h=e4049c75f9408fa96a8ed034972c9687fce78de6

Fix: send_channel_monitor_pipe does not take the consumer socket lock

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

diff --git a/src/bin/lttng-sessiond/consumer.c b/src/bin/lttng-sessiond/consumer.c
index 5e723e9b3..251944606 100644
--- a/src/bin/lttng-sessiond/consumer.c
+++ b/src/bin/lttng-sessiond/consumer.c
@@ -1068,6 +1068,7 @@ int consumer_send_channel_monitor_pipe(struct consumer_socket *consumer_sock,
 	memset(&msg, 0, sizeof(msg));
 	msg.cmd_type = LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE;
 
+	pthread_mutex_lock(consumer_sock->lock);
 	DBG3("Sending set_channel_monitor_pipe command to consumer");
 	ret = consumer_send_msg(consumer_sock, &msg);
 	if (ret < 0) {
@@ -1083,6 +1084,7 @@ int consumer_send_channel_monitor_pipe(struct consumer_socket *consumer_sock,
 
 	DBG2("Channel monitoring pipe successfully sent");
 error:
+	pthread_mutex_unlock(consumer_sock->lock);
 	return ret;
 }
 
diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index ea28feecf..30f3b714e 100644
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -1270,6 +1270,7 @@ restart:
 	if (!cmd_socket_wrapper) {
 		goto error;
 	}
+	cmd_socket_wrapper->lock = &consumer_data->lock;
 
 	ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper,
 			consumer_data->channel_monitor_pipe);