cluster: RHEL6 - rgmanager: Check for NULL when attempting to access the member list

[Ryan McCabe]

Gitweb:       
http://git.fedorahosted.org/git/?p=cluster.git;a=commitdiff;h=52816e6e75e...
Commit:        52816e6e75e47f23414afde26bdce2f0d6f21feb
Parent:        abd0d212698ca681e42d3d2869fc728d1908f346
Author:        Ryan McCabe <rmccabe(a)redhat.com&gt;
AuthorDate:    Mon Jun 6 11:26:53 2016 -0400
Committer:     Ryan McCabe <rmccabe(a)redhat.com&gt;
CommitterDate: Mon Jun 6 11:26:53 2016 -0400

rgmanager: Check for NULL when attempting to access the member list

Check that the membership list is not NULL before accessing it while sending
state information. This can happen during very shortly after startup if
modclusterd is running and sends a clustat command before initialization is
complete.

Resolves: rhbz#1228170
Signed-off-by: Ryan McCabe <rmccabe(a)redhat.com&gt;
---
 rgmanager/src/daemons/main.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/rgmanager/src/daemons/main.c b/rgmanager/src/daemons/main.c
index 3679d57..127015b 100644
--- a/rgmanager/src/daemons/main.c
+++ b/rgmanager/src/daemons/main.c
@@ -77,6 +77,9 @@ send_node_states(msgctx_t *ctx)
 	generic_msg_hdr hdr;
 	cluster_member_list_t *ml = member_list();
 
+	if (!ml)
+		return;
+
 	master.m_nodeid = 0;
 	event_master_info_cached(&master);