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authorDaniel Drake <dsd@laptop.org>2012-08-02 18:41:48 +0100
committerJohn W. Linville <linville@tuxdriver.com>2012-08-06 14:29:58 -0400
commit1f6fc43e621167492ed4b7f3b4269c584c3d6ccc (patch)
tree9d1ad634c1405a8bdd0f9439b598508203cee829 /net
parentd4e5979c0da95791aa717c18e162540c7a596360 (diff)
cfg80211: process pending events when unregistering net device
libertas currently calls cfg80211_disconnected() when it is being brought down. This causes an event to be allocated, but since the wdev is already removed from the rdev by the time that the event processing work executes, the event is never processed or freed. http://article.gmane.org/gmane.linux.kernel.wireless.general/95666 Fix this leak, and other possible situations, by processing the event queue when a device is being unregistered. Thanks to Johannes Berg for the suggestion. Signed-off-by: Daniel Drake <dsd@laptop.org> Cc: stable@vger.kernel.org Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
-rw-r--r--net/wireless/core.c5
-rw-r--r--net/wireless/core.h1
-rw-r--r--net/wireless/util.c2
3 files changed, 7 insertions, 1 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 31b40cc4a9c3..dcd64d5b07aa 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -952,6 +952,11 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
*/
synchronize_rcu();
INIT_LIST_HEAD(&wdev->list);
+ /*
+ * Ensure that all events have been processed and
+ * freed.
+ */
+ cfg80211_process_wdev_events(wdev);
break;
case NETDEV_PRE_UP:
if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 5206c6844fd7..bc7430b54771 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -426,6 +426,7 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
struct net_device *dev, enum nl80211_iftype ntype,
u32 *flags, struct vif_params *params);
void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
+void cfg80211_process_wdev_events(struct wireless_dev *wdev);
int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 26f8cd30f712..994e2f0cc7a8 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -735,7 +735,7 @@ void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
wdev->connect_keys = NULL;
}
-static void cfg80211_process_wdev_events(struct wireless_dev *wdev)
+void cfg80211_process_wdev_events(struct wireless_dev *wdev)
{
struct cfg80211_event *ev;
unsigned long flags;

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