From 70df4c21c0da3baacb6601d924dd1fb2b3cad1b3 Mon Sep 17 00:00:00 2001
From: luozhengzheng <luo.zhengzheng@zte.com.cn>
Date: Wed, 9 Nov 2016 06:34:52 +0800
Subject: [PATCH] Fix coverity defects: 154021

CID 154021: Null pointer dereference

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: luozhengzheng <luo.zhengzheng@zte.com.cn>
Closes #5380
---
 cmd/zed/agents/fmd_serd.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmd/zed/agents/fmd_serd.c b/cmd/zed/agents/fmd_serd.c
index 6143c5d7e1..043552862e 100644
--- a/cmd/zed/agents/fmd_serd.c
+++ b/cmd/zed/agents/fmd_serd.c
@@ -300,6 +300,9 @@ fmd_serd_eng_gc(fmd_serd_eng_t *sgp)
 		return; /* no garbage collection needed if empty or fired */
 
 	sep = list_head(&sgp->sg_list);
+	if (sep == NULL)
+		return;
+
 	hrt = sep->se_hrt - sgp->sg_t;
 
 	for (sep = list_head(&sgp->sg_list); sep != NULL; sep = nep) {