From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Thu, 13 Nov 2014 21:09:57 +0000 (-0500)
Subject: Fix: missing rcu_read_lock in cmd_start_trace()
X-Git-Tag: v2.4.3~36
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=204ce14b8b883eb25afbdf9336e5cd3d7f8b8fb9;p=lttng-tools.git

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 022d5cee1..fc8c39250 100644
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -1805,7 +1805,9 @@ 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;