commit 9fbc630c89fd210e15ffe84fd6e968a2d39000b0
author Felix Fietkau <nbd@openwrt.org> Sat May 15 15:46:17 2010 +0200
committer John W. Linville <linville@tuxdriver.com> Fri May 21 14:40:00 2010 -0400
tree 7cd2283f43fcae0ce5779cffd976579977757989
parent b9f2e39d4c2bcd8e94f73ae14450d7764f930a41

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>

net/wireless/chan.c

diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index d92d088..b01a6f6 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -50,7 +50,7 @@
 	struct ieee80211_channel *chan;
 	int result;
 
-	if (wdev->iftype == NL80211_IFTYPE_MONITOR)
+	if (wdev && wdev->iftype == NL80211_IFTYPE_MONITOR)
 		wdev = NULL;
 
 	if (wdev) {