[PATCH] net: thunderx: nicvf_main: Fix potential NULL pointer dereference

[Gustavo A. R. Silva]

Add null check on kmalloc() return value in order to prevent
a null pointer dereference.

Addresses-Coverity-ID: 1467429 ("Dereference null return value")
Fixes: 37c3347eb247 ("net: thunderx: add ndo_set_rx_mode callback 
implementation for VF")
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
 drivers/net/ethernet/cavium/thunder/nicvf_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c 
b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 1e9a31f..468321a 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -1999,6 +1999,8 @@ static void nicvf_set_rx_mode(struct net_device *netdev)
                                struct xcast_addr *xaddr;
 
                                mc_list = kmalloc(sizeof(*mc_list), GFP_ATOMIC);
+                               if (unlikely(!mc_list))
+                                       return;
                                INIT_LIST_HEAD(&mc_list->list);
                                netdev_hw_addr_list_for_each(ha, &netdev->mc) {
                                        xaddr = kmalloc(sizeof(*xaddr),
-- 
2.7.4