[lttng-dev] [PATCH lttng-tools] Fix: Hold consumer socket lock for consumer_send_msg

[Jonathan Rajotte]

The lock is held and released during the recv section but not
during the send section for a failure to lookup the PID registry.

Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien at efficios.com>
---
 src/bin/lttng-sessiond/ust-consumer.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/bin/lttng-sessiond/ust-consumer.c b/src/bin/lttng-sessiond/ust-consumer.c
index d8d6c32..b9865a0 100644
--- a/src/bin/lttng-sessiond/ust-consumer.c
+++ b/src/bin/lttng-sessiond/ust-consumer.c
@@ -513,7 +513,9 @@ int ust_consumer_metadata_request(struct consumer_socket *socket)
 
 			memset(&msg, 0, sizeof(msg));
 			msg.cmd_type = LTTNG_ERR_UND;
+			pthread_mutex_lock(socket->lock);
 			(void) consumer_send_msg(socket, &msg);
+			pthread_mutex_unlock(socket->lock);
 			/*
 			 * This is possible since the session might have been destroyed
 			 * during a consumer metadata request. So here, return gracefully
-- 
2.7.4