net: mvpp2: Use strscpy to handle stat strings

[ Upstream commit d37acd5aa99c57505b64913e0e2624ec3daed8c5 ]

Use a safe strscpy call to copy the ethtool stat strings into the
relevant buffers, instead of a memcpy that will be accessing
out-of-bound data.

Fixes: 118d6298f6f0 ("net: mvpp2: add ethtool GOP statistics")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 59212d3..df5b74f 100644 (file)
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -1310,8 +1310,8 @@ static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset,
                int i;
 
                for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++)
-                       memcpy(data + i * ETH_GSTRING_LEN,
-                              &mvpp2_ethtool_regs[i].string, ETH_GSTRING_LEN);
+                       strscpy(data + i * ETH_GSTRING_LEN,
+                               mvpp2_ethtool_regs[i].string, ETH_GSTRING_LEN);
        }
 }