[dpdk-dev] [PATCH v2 2/2] graph: fix dereferencing null pointer

[Min Hu (Connor)]

From: HongBo Zheng <zhenghongbo3 at huawei.com>

In function 'stats_mem_init', pointer 'stats' should
be confirmed not null before memset it.

Fixes: af1ae8b6a32c ("graph: implement stats")
Cc: stable at dpdk.org

Signed-off-by: HongBo Zheng <zhenghongbo3 at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
---
 lib/graph/graph_stats.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/graph/graph_stats.c b/lib/graph/graph_stats.c
index 30e295d..aa70929 100644
--- a/lib/graph/graph_stats.c
+++ b/lib/graph/graph_stats.c
@@ -119,8 +119,8 @@ stats_mem_init(struct cluster *cluster,
 	cluster_node_size = RTE_ALIGN(cluster_node_size, RTE_CACHE_LINE_SIZE);
 
 	stats = realloc(NULL, sz);
-	memset(stats, 0, sz);
 	if (stats) {
+		memset(stats, 0, sz);
 		stats->fn = fn;
 		stats->cluster_node_size = cluster_node_size;
 		stats->max_nodes = 0;
-- 
2.7.4