Fix: Missing rcu_read_lock in get_session_max_subbuf_size()

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 e9427eb249cfc5e9af9add223160947dfcd5875d..49243ae2639f95f506107df2d9b46cafeba29dd1 100644 (file)
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -3036,12 +3036,14 @@ static uint64_t get_session_max_subbuf_size(struct ltt_session *session)
                struct ltt_ust_channel *uchan;
                struct ltt_ust_session *usess = session->ust_session;
 
+               rcu_read_lock();
                cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter,
                                uchan, node.node) {
                        if (uchan->attr.subbuf_size > max_size) {
                                max_size = uchan->attr.subbuf_size;
                        }
                }
+               rcu_read_unlock();
        }
 
        return max_size;