From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Mon, 8 Oct 2012 00:43:45 +0000 (+0800)
Subject: staging: r8712u: fix potential NULL pointer dereference in r871x_wps_start()
X-Git-Tag: master-2012-12-14~44^2~1119
X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=605fba82a2d6f8e19b7530805b792487562429a7;p=~andy%2Flinux

staging: r8712u: fix potential NULL pointer dereference in r871x_wps_start()

The dereference should be moved below the NULL test.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
index c9a6a7fbb89..3a647906451 100644
--- a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
+++ b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
@@ -2110,10 +2110,10 @@ static int r871x_wps_start(struct net_device *dev,
 	struct iw_point *pdata = &wrqu->data;
 	u32   u32wps_start = 0;
 
-	if (copy_from_user((void *)&u32wps_start, pdata->pointer, 4))
-		return -EFAULT;
 	if ((padapter->bDriverStopped) || (pdata == NULL))
 		return -EINVAL;
+	if (copy_from_user((void *)&u32wps_start, pdata->pointer, 4))
+		return -EFAULT;
 	if (u32wps_start == 0)
 		u32wps_start = *extra;
 	if (u32wps_start == 1) /* WPS Start */