From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Tue, 18 Nov 2014 18:37:29 +0000 (-0500)
Subject: Fix: Missing rcu_read_lock in ust_app_get_nb_stream()
X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=commitdiff_plain;h=b7064eaa65112fa87bd75ddeed768bae0645f271

Fix: Missing rcu_read_lock in ust_app_get_nb_stream()

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

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 132bde1bd..891d75f7c 100644
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -5152,10 +5152,12 @@ unsigned int ust_app_get_nb_stream(struct ltt_ust_session *usess)
 		cds_list_for_each_entry(reg, &usess->buffer_reg_uid_list, lnode) {
 			struct buffer_reg_channel *reg_chan;
 
+			rcu_read_lock();
 			cds_lfht_for_each_entry(reg->registry->channels->ht, &iter.iter,
 					reg_chan, node.node) {
 				ret += reg_chan->stream_count;
 			}
+			rcu_read_unlock();
 		}
 		break;
 	}