Fix: missing rcu_read_lock in cmd_start_trace()

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

diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c
index 62324455fe68aeee93fca8a4ebd8c00f8c19b6a3..d40b58c365be01609300faa1eb77ce2f3063a313 100644 (file)
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -1836,7 +1836,9 @@ int cmd_start_trace(struct ltt_session *session)
         * possible to enable channel thus inform the client.
         */
        if (usess && usess->domain_global.channels) {
+               rcu_read_lock();
                nb_chan += lttng_ht_get_count(usess->domain_global.channels);
+               rcu_read_unlock();
        }
        if (ksession) {
                nb_chan += ksession->channel_count;