From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Fri, 28 Jan 2022 22:59:46 +0000 (-0500)
Subject: Fix: missing RCU read side critical sections
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=6ba36f78b2d1b3ca1dd6e544183bac92915e788f;p=lttng-tools.git

Fix: missing RCU read side critical sections

Based on the comments of the called functions.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Ica81b648ce88290c4ca7507fb00a78480457cf01
---

diff --git a/src/bin/lttng-sessiond/event.c b/src/bin/lttng-sessiond/event.c
index bfca8be6b..89510294e 100644
--- a/src/bin/lttng-sessiond/event.c
+++ b/src/bin/lttng-sessiond/event.c
@@ -471,6 +471,7 @@ static int agent_enable(struct agent *agt,
 	assert(event);
 	assert(agt);
 
+	rcu_read_lock();
 	aevent = agent_find_event(event->name, event->loglevel_type,
 			event->loglevel, filter_expression, agt);
 	if (!aevent) {
@@ -519,6 +520,7 @@ error:
 		agent_destroy_event(aevent);
 	}
 end:
+	rcu_read_unlock();
 	free(filter);
 	free(filter_expression);
 	return ret;