From 4996d7b5c500553aa1c5af33ba152fdf6ec19d71 Mon Sep 17 00:00:00 2001
From: Paul Luse <paul.e.luse@intel.com>
Date: Mon, 16 Jul 2018 17:03:12 -0700
Subject: [PATCH] test: check for null before deref of g_head

Followup to earlier fix, didn't see this until after fixing bdev
the rest of the way...

Change-Id: Idc663ffe6a90e6cb3511e4e703f2e9c667a3eac4
Signed-off-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-on: https://review.gerrithub.io/419445
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ziye Yang <optimistyzy@gmail.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
---
 test/bdev/bdevperf/bdevperf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test/bdev/bdevperf/bdevperf.c b/test/bdev/bdevperf/bdevperf.c
index a5cc7d855..a47b8bc31 100644
--- a/test/bdev/bdevperf/bdevperf.c
+++ b/test/bdev/bdevperf/bdevperf.c
@@ -809,6 +809,9 @@ spdk_bdevperf_shutdown_cb(void)
 
 	/* Send events to stop all I/O on each core */
 	for (i = 0; i < spdk_env_get_core_count(); i++) {
+		if (g_head == NULL) {
+			break;
+		}
 		target = g_head[i];
 		if (target == NULL) {
 			break;