[U-Boot] [PATCH 1/1] net: core: avoid possible NULL pointer dereference

Heinrich Schuchardt xypron.glpk at gmx.de
Tue May 16 03:07:01 UTC 2017


Checking if dev is NULL after dereferencing it does not make sense.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 net/eth-uclass.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/eth-uclass.c b/net/eth-uclass.c
index c3cc3152a2..b659961a5d 100644
--- a/net/eth-uclass.c
+++ b/net/eth-uclass.c
@@ -181,7 +181,7 @@ int eth_get_dev_index(void)
 
 static int eth_write_hwaddr(struct udevice *dev)
 {
-	struct eth_pdata *pdata = dev->platdata;
+	struct eth_pdata *pdata;
 	int ret = 0;
 
 	if (!dev || !device_active(dev))
@@ -189,6 +189,7 @@ static int eth_write_hwaddr(struct udevice *dev)
 
 	/* seq is valid since the device is active */
 	if (eth_get_ops(dev)->write_hwaddr && !eth_mac_skip(dev->seq)) {
+		pdata = dev->platdata;
 		if (!is_valid_ethaddr(pdata->enetaddr)) {
 			printf("\nError: %s address %pM illegal value\n",
 			       dev->name, pdata->enetaddr);
-- 
2.11.0



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