From 02405219424619a56e7e3a3619e157f942e4fdb4 Mon Sep 17 00:00:00 2001
From: Zdenek Kabelac <zkabelac@redhat.com>
Date: Fri, 14 Jun 2013 09:51:09 +0200
Subject: [PATCH] cleanup: add extra internal error

Ensure the target line will work only with segment with pool.
---
 lib/thin/thin.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/thin/thin.c b/lib/thin/thin.c
index d1ffd27a5..116b7e109 100644
--- a/lib/thin/thin.c
+++ b/lib/thin/thin.c
@@ -493,6 +493,11 @@ static int _thin_add_target_line(struct dev_manager *dm,
 	char *pool_dlid, *external_dlid;
 	uint32_t device_id = seg->device_id;
 
+	if (!seg->pool_lv) {
+		log_error(INTERNAL_ERROR "Segment %s has no pool.",
+			  seg->lv->name);
+		return 0;
+	}
 	if (!(pool_dlid = build_dm_uuid(mem, seg->pool_lv->lvid.s, lv_layer(seg->pool_lv)))) {
 		log_error("Failed to build uuid for pool LV %s.",
 			  seg->pool_lv->name);