LU-8001 nodemap: fix null deref when reclassifying

[fs/lustre-release.git] / lustre / ptlrpc / nodemap_member.c

diff --git a/lustre/ptlrpc/nodemap_member.c b/lustre/ptlrpc/nodemap_member.c
index d4ffc23..7ec2fd6 100644 (file)
--- a/lustre/ptlrpc/nodemap_member.c
+++ b/lustre/ptlrpc/nodemap_member.c
@@ -147,10 +147,15 @@ void nm_member_reclassify_nodemap(struct lu_nodemap *nodemap)
        mutex_lock(&nodemap->nm_member_list_lock);
        list_for_each_entry_safe(exp, tmp, &nodemap->nm_member_list,
                                 exp_target_data.ted_nodemap_member) {
-               lnet_nid_t nid = exp->exp_connection->c_peer.nid;
+               struct ptlrpc_connection *conn = exp->exp_connection;
+
+               /* if no conn assigned to this exp, reconnect will reclassify */
+               if (conn)
+                       /* nodemap_classify_nid requires nmc_range_tree_lock */
+                       new_nodemap = nodemap_classify_nid(conn->c_peer.nid);
+               else
+                       continue;
 
-               /* nodemap_classify_nid requires nmc_range_tree_lock */
-               new_nodemap = nodemap_classify_nid(nid);
                if (new_nodemap != nodemap) {
                        /* don't use member_del because ted_nodemap
                         * should never be null