From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 15 May 2010 13:46:17 +0000 (+0200)
Subject: cfg80211: fix crash in cfg80211_set_freq()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9fbc630c89fd210e15ffe84fd6e968a2d39000b0;p=linux-beck.git

cfg80211: fix crash in cfg80211_set_freq()

Since wdev can be NULL, check it before dereferencing it

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index d92d088026bf..b01a6f6397d7 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -50,7 +50,7 @@ int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
 	struct ieee80211_channel *chan;
 	int result;
 
-	if (wdev->iftype == NL80211_IFTYPE_MONITOR)
+	if (wdev && wdev->iftype == NL80211_IFTYPE_MONITOR)
 		wdev = NULL;
 
 	if (wdev) {