cfg80211: add missing device list locking
When calling into the wext code from the NETDEV_UP
notifier, we need to hold the devlist_mtx mutex as
the wext code ends up calling into channel checks.
Reported-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 62e1ac0..e630648 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -710,6 +710,7 @@
case NETDEV_UP:
#ifdef CONFIG_WIRELESS_EXT
cfg80211_lock_rdev(rdev);
+ mutex_lock(&rdev->devlist_mtx);
wdev_lock(wdev);
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
@@ -722,6 +723,7 @@
break;
}
wdev_unlock(wdev);
+ mutex_unlock(&rdev->devlist_mtx);
cfg80211_unlock_rdev(rdev);
#endif
break;