linux-kernel - [PATCH] staging: rtl8723au: os_dep: usb_intf.c: Fix for possible null pointer dereference

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Date:	Sun, 14 Dec 2014 23:39:14 +0100
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Larry Finger <Larry.Finger@...inger.net>,
	Jes Sorensen <Jes.Sorensen@...hat.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-wireless@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] staging: rtl8723au: os_dep: usb_intf.c:  Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/staging/rtl8723au/os_dep/usb_intf.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8723au/os_dep/usb_intf.c b/drivers/staging/rtl8723au/os_dep/usb_intf.c
index 865743e..71a6330 100644
--- a/drivers/staging/rtl8723au/os_dep/usb_intf.c
+++ b/drivers/staging/rtl8723au/os_dep/usb_intf.c
@@ -351,10 +351,11 @@ error_exit:
 int rtw_hw_resume23a(struct rtw_adapter *padapter)
 {
 	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
-	struct net_device *pnetdev = padapter->pnetdev;
+	struct net_device *pnetdev;
 
 	if (padapter) { /* system resume */
 		DBG_8723A("==> rtw_hw_resume23a\n");
+		pnetdev = padapter->pnetdev;
 		down(&pwrpriv->lock);
 		pwrpriv->bips_processing = true;
 		rtw_reset_drv_sw23a(padapter);
-- 
1.7.10.4

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