netdev - [PATCH] net: arc_emac: Fix the error-dereferencing freed memory 'bus'

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Date:   Mon, 20 Sep 2021 21:25:37 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>,
        <dan.carpenter@...cle.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Cai Huoqing <caihuoqing@...du.com>
Subject: [PATCH] net: arc_emac: Fix the error-dereferencing freed memory 'bus'

Don't print 'bus->name' in the error info，because 'bus'
has already been freed.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
---
 drivers/net/ethernet/arc/emac_mdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/arc/emac_mdio.c b/drivers/net/ethernet/arc/emac_mdio.c
index 9acf589b1178..2c08855a826c 100644
--- a/drivers/net/ethernet/arc/emac_mdio.c
+++ b/drivers/net/ethernet/arc/emac_mdio.c
@@ -167,7 +167,7 @@ int arc_mdio_probe(struct arc_emac_priv *priv)
 	if (error) {
 		mdiobus_free(bus);
 		return dev_err_probe(priv->dev, error,
-				     "cannot register MDIO bus %s\n", bus->name);
+				     "Failed to register MDIO bus\n");
 	}
 
 	return 0;
-- 
2.25.1