diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
index 9e0f57cfa3bf..5fa156e89a73 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
@@ -476,15 +476,27 @@ int kfd_criu_checkpoint_events(struct kfd_process *p,
 	int ret =  0;
 	struct kfd_event *ev;
 	uint32_t ev_id;
+	uint32_t num_events;
 
-	uint32_t num_events = kfd_get_num_events(p);
+	/* Serialize the count and the walk below against concurrent event
+	 * create/destroy. Those paths take only p->event_mutex, not the
+	 * p->mutex held by the CRIU checkpoint caller, so without this the
+	 * event_idr can grow between kfd_get_num_events() and the loop and the
+	 * walk writes past the ev_privs allocation.
+	 */
+	mutex_lock(&p->event_mutex);
 
-	if (!num_events)
+	num_events = kfd_get_num_events(p);
+	if (!num_events) {
+		mutex_unlock(&p->event_mutex);
 		return 0;
+	}
 
 	ev_privs = kvzalloc(num_events * sizeof(*ev_privs), GFP_KERNEL);
-	if (!ev_privs)
+	if (!ev_privs) {
+		mutex_unlock(&p->event_mutex);
 		return -ENOMEM;
+	}
 
 
 	idr_for_each_entry(&p->event_idr, ev, ev_id) {
@@ -525,6 +537,8 @@ int kfd_criu_checkpoint_events(struct kfd_process *p,
 		i++;
 	}
 
+	mutex_unlock(&p->event_mutex);
+
 	ret = copy_to_user(user_priv_data + *priv_data_offset,
 			   ev_privs, num_events * sizeof(*ev_privs));
 	if (ret) {