From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Tue, 18 Nov 2014 19:15:07 +0000 (-0500)
Subject: Fix: Missing rcu_read_locks in cmd_list_domains()
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=e0a74f0198e6b12320fb6118b5193759e4329f76

Fix: Missing rcu_read_locks in cmd_list_domains()

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 0b97ed61a..9fc21fcaf 100644
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -2415,12 +2415,14 @@ ssize_t cmd_list_domains(struct ltt_session *session,
 		DBG3("Listing domains found UST global domain");
 		nb_dom++;
 
+		rcu_read_lock();
 		cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter,
 				agt, node.node) {
 			if (agt->being_used) {
 				nb_dom++;
 			}
 		}
+		rcu_read_unlock();
 	}
 
 	if (!nb_dom) {
@@ -2443,6 +2445,7 @@ ssize_t cmd_list_domains(struct ltt_session *session,
 		(*domains)[index].buf_type = session->ust_session->buffer_type;
 		index++;
 
+		rcu_read_lock();
 		cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter,
 				agt, node.node) {
 			if (agt->being_used) {
@@ -2451,6 +2454,7 @@ ssize_t cmd_list_domains(struct ltt_session *session,
 				index++;
 			}
 		}
+		rcu_read_unlock();
 	}
 end:
 	return nb_dom;