rtl8xxxu: Check return value of kmemdup()

In rtl8xxxu_load_firmware() check the return value of kmemdup() and
error out with -ENOMEM in case of NULL to prevent a NULL pointer
dereference.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
index e98e053..08d8e1f 100644 (file)
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
@@ -2197,6 +2197,10 @@ static int rtl8xxxu_load_firmware(struct rtl8xxxu_priv *priv, char *fw_name)
        }
 
        priv->fw_data = kmemdup(fw->data, fw->size, GFP_KERNEL);
+       if (!priv->fw_data) {
+               ret = -ENOMEM;
+               goto exit;
+       }
        priv->fw_size = fw->size - sizeof(struct rtl8xxxu_firmware_header);
 
        signature = le16_to_cpu(priv->fw_data->signature);