From 9fbc630c89fd210e15ffe84fd6e968a2d39000b0 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 15 May 2010 15:46:17 +0200
Subject: [PATCH] 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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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) {
--
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