net/nfp: fix memcpy out of source range

drivers/net/nfp/nfp_net.c:669:2: error:
‘memcpy’ forming offset [5, 6] is out of the bounds [0, 4]
of object ‘tmp’ with type ‘uint32_t’ {aka ‘unsigned int’}
[-Werror=array-bounds]
memcpy(&hw->mac_addr[0], &tmp, sizeof(struct ether_addr));

Fixes: e6decee38209 ("net/nfp: use random MAC address if not configured")
Cc: stable@dpdk.org
Signed-off-by: Andy Green <andy@warmcat.com>
Acked-by: Alejandro Lucero <alejandro.lucero@netronome.com>
Tested-by: Alejandro Lucero <alejandro.lucero@netronome.com>

diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 8a712d6..80dc273 100644 (file)
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -527,7 +527,7 @@ nfp_net_vf_read_mac(struct nfp_net_hw *hw)
        uint32_t tmp;
 
        tmp = rte_be_to_cpu_32(nn_cfg_readl(hw, NFP_NET_CFG_MACADDR));
-       memcpy(&hw->mac_addr[0], &tmp, sizeof(struct ether_addr));
+       memcpy(&hw->mac_addr[0], &tmp, 4);
 
        tmp = rte_be_to_cpu_32(nn_cfg_readl(hw, NFP_NET_CFG_MACADDR + 4));
        memcpy(&hw->mac_addr[4], &tmp, 2);