net/qede: fix possible null pointer dereference

In function qede_rss_reta_update(), the pointer params returned from
call to function rte_zmalloc() may be NULL and will be dereferenced.
So, should judge if the params is NULL or not.

Fixes: 8b3ee85efe11 ("net/qede: fix RSS table entries for 100G adapter")
Cc: stable@dpdk.org
Signed-off-by: RongQiang Xie <xie.rongqiang@zte.com.cn>
Acked-by: Harish Patil <harish.patil@cavium.com>

diff --git a/drivers/net/qede/qede_ethdev.c b/drivers/net/qede/qede_ethdev.c
index 0e05989..4e9e89f 100644 (file)
--- a/drivers/net/qede/qede_ethdev.c
+++ b/drivers/net/qede/qede_ethdev.c
@@ -2012,6 +2012,10 @@ int qede_rss_reta_update(struct rte_eth_dev *eth_dev,
        memset(&vport_update_params, 0, sizeof(vport_update_params));
        params = rte_zmalloc("qede_rss", sizeof(*params) * edev->num_hwfns,
                             RTE_CACHE_LINE_SIZE);
+       if (params == NULL) {
+               DP_ERR(edev, "failed to allocate memory\n");
+               return -ENOMEM;
+       }
 
        for (i = 0; i < reta_size; i++) {
                idx = i / RTE_RETA_GROUP_SIZE;