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* [PATCH] [v2] Staging: rtl8188eu: rtw_mlme: Fix uninitialized variable authmode
@ 2020-07-28  7:21 Dinghao Liu
  2020-07-28  8:58 ` Dan Carpenter
  0 siblings, 1 reply; 2+ messages in thread
From: Dinghao Liu @ 2020-07-28  7:21 UTC (permalink / raw)
  To: dinghao.liu, kjlu, dan.carpenter
  Cc: devel, Greg Kroah-Hartman, linux-kernel, Shreeya Patel, Larry Finger

The variable authmode can be uninitialized. The danger would be if
it equals to _WPA_IE_ID_ (0xdd) or _WPA2_IE_ID_ (0x33). We can avoid
this by setting it to zero instead. This is the approach that was
used in the rtl8723bs driver.

Fixes: 7b464c9fa5cc ("staging: r8188eu: Add files for new driver - part 4")
Co-developed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---

Changelog:

v2: - Move the initialization after 'else' statement.
      Refine commit message.
---
 drivers/staging/rtl8188eu/core/rtw_mlme.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme.c b/drivers/staging/rtl8188eu/core/rtw_mlme.c
index 9de2d421f6b1..4f2abe1e14d5 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme.c
@@ -1729,9 +1729,11 @@ int rtw_restruct_sec_ie(struct adapter *adapter, u8 *in_ie, u8 *out_ie, uint in_
 	if ((ndisauthmode == Ndis802_11AuthModeWPA) ||
 	    (ndisauthmode == Ndis802_11AuthModeWPAPSK))
 		authmode = _WPA_IE_ID_;
-	if ((ndisauthmode == Ndis802_11AuthModeWPA2) ||
+	else if ((ndisauthmode == Ndis802_11AuthModeWPA2) ||
 	    (ndisauthmode == Ndis802_11AuthModeWPA2PSK))
 		authmode = _WPA2_IE_ID_;
+	else
+		authmode = 0x0;
 
 	if (check_fwstate(pmlmepriv, WIFI_UNDER_WPS)) {
 		memcpy(out_ie + ielength, psecuritypriv->wps_ie, psecuritypriv->wps_ie_len);
-- 
2.17.1

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^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH] [v2] Staging: rtl8188eu: rtw_mlme: Fix uninitialized variable authmode
  2020-07-28  7:21 [PATCH] [v2] Staging: rtl8188eu: rtw_mlme: Fix uninitialized variable authmode Dinghao Liu
@ 2020-07-28  8:58 ` Dan Carpenter
  0 siblings, 0 replies; 2+ messages in thread
From: Dan Carpenter @ 2020-07-28  8:58 UTC (permalink / raw)
  To: Dinghao Liu
  Cc: devel, Greg Kroah-Hartman, kjlu, linux-kernel, Shreeya Patel,
	Larry Finger

Thanks!

regards,
dan carpenter

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devel mailing list
devel@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2020-07-28  7:21 [PATCH] [v2] Staging: rtl8188eu: rtw_mlme: Fix uninitialized variable authmode Dinghao Liu
2020-07-28  8:58 ` Dan Carpenter

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