From 6e9b35774807f99a437aa267a5d68dd12e1db6fe Mon Sep 17 00:00:00 2001
From: Tomas Bzatek <tbzatek@redhat.com>
Date: Wed, 1 Dec 2021 18:15:59 +0100
Subject: [PATCH] tree: Handle NULL hostid in nvme_lookup_host()

When hostid is specified for lookup and some of the tree
host records carry a NULL, avoid a segfault here on strcmp().
---
 src/nvme/tree.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nvme/tree.c b/src/nvme/tree.c
index c1e58f93..a782f04a 100644
--- a/src/nvme/tree.c
+++ b/src/nvme/tree.c
@@ -374,8 +374,8 @@ struct nvme_host *nvme_lookup_host(nvme_root_t r, const char *hostnqn,
 	nvme_for_each_host(r, h) {
 		if (strcmp(h->hostnqn, hostnqn))
 			continue;
-		if (hostid &&
-		    strcmp(h->hostid, hostid))
+		if (hostid && (!h->hostid ||
+		    strcmp(h->hostid, hostid)))
 			continue;
 		return h;
 	}
-- 
2.50.1