From 269a47906403c420614b2fe21a4c5ea38b911de6 Mon Sep 17 00:00:00 2001
From: Jim Harris <james.r.harris@intel.com>
Date: Fri, 1 Jun 2018 07:17:34 -0700
Subject: [PATCH] nvme/overhead: fix segfault when no SSD found

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I862a7eb89d6357c85285d2a6cd90ad9f633d2435

Reviewed-on: https://review.gerrithub.io/413285
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
---
 test/nvme/overhead/overhead.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/test/nvme/overhead/overhead.c b/test/nvme/overhead/overhead.c
index 053c99d65..86c37f268 100644
--- a/test/nvme/overhead/overhead.c
+++ b/test/nvme/overhead/overhead.c
@@ -683,9 +683,11 @@ int main(int argc, char **argv)
 	print_stats();
 
 cleanup:
-	spdk_histogram_data_free(g_ns->submit_histogram);
-	spdk_histogram_data_free(g_ns->complete_histogram);
-	free(g_ns);
+	if (g_ns) {
+		spdk_histogram_data_free(g_ns->submit_histogram);
+		spdk_histogram_data_free(g_ns->complete_histogram);
+		free(g_ns);
+	}
 	if (g_ctrlr) {
 		spdk_nvme_detach(g_ctrlr->ctrlr);
 		free(g_ctrlr);