From: Xinming Hu <huxm@marvell.com>
Date: Fri, 18 Sep 2015 13:32:07 +0000 (-0700)
Subject: mwifiex: NULL check for cfg80211_inform_bss()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=02421dd3f6af1b6becb6d9a690a2b70c73c03a7a;p=linux-beck.git

mwifiex: NULL check for cfg80211_inform_bss()

cfg80211_inform_bss would return null in some cases, such as
memory allocation failure.

This patch adds sanity check for this case, to avoid possible
issues when above corner case is hit.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---

diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index d8143409da60..30cbafbd17c6 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1994,8 +1994,10 @@ static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv)
 				  CFG80211_BSS_FTYPE_UNKNOWN,
 				  bss_info.bssid, 0, WLAN_CAPABILITY_IBSS,
 				  0, ie_buf, ie_len, 0, GFP_KERNEL);
-	cfg80211_put_bss(priv->wdev.wiphy, bss);
-	memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN);
+	if (bss) {
+		cfg80211_put_bss(priv->wdev.wiphy, bss);
+		ether_addr_copy(priv->cfg_bssid, bss_info.bssid);
+	}
 
 	return 0;
 }
diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c
index 5847863a2d6b..3675730fc3b5 100644
--- a/drivers/net/wireless/mwifiex/scan.c
+++ b/drivers/net/wireless/mwifiex/scan.c
@@ -1839,14 +1839,18 @@ mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
 					    bssid, timestamp,
 					    cap_info_bitmap, beacon_period,
 					    ie_buf, ie_len, rssi, GFP_KERNEL);
-			bss_priv = (struct mwifiex_bss_priv *)bss->priv;
-			bss_priv->band = band;
-			bss_priv->fw_tsf = fw_tsf;
-			if (priv->media_connected &&
-			    !memcmp(bssid, priv->curr_bss_params.bss_descriptor
-				    .mac_address, ETH_ALEN))
-				mwifiex_update_curr_bss_params(priv, bss);
-			cfg80211_put_bss(priv->wdev.wiphy, bss);
+			if (bss) {
+				bss_priv = (struct mwifiex_bss_priv *)bss->priv;
+				bss_priv->band = band;
+				bss_priv->fw_tsf = fw_tsf;
+				if (priv->media_connected &&
+				    !memcmp(bssid, priv->curr_bss_params.
+					    bss_descriptor.mac_address,
+					    ETH_ALEN))
+					mwifiex_update_curr_bss_params(priv,
+								       bss);
+				cfg80211_put_bss(priv->wdev.wiphy, bss);
+			}
 
 			if ((chan->flags & IEEE80211_CHAN_RADAR) ||
 			    (chan->flags & IEEE80211_CHAN_NO_IR)) {