From 98a4635bba7050afdbdce428cc44a0471779ffc5 Mon Sep 17 00:00:00 2001 From: Amitkumar Karwar Date: Thu, 14 Nov 2013 19:10:40 -0800 Subject: [PATCH] mwifiex: fix potential mem leak in .del_virtual_intf 1) Currently we freeing wdev for each interface in driver unload path. We may leak memory if user have already deleted an interface. mwifiex_add_virtual_intf() allocates wdev structure. So it should be freed in mwifiex_del_virtual_intf(). This will make sure that wdev will be freed when user deletes an interface and also in unload path. 2) "priv->netdev->ieee80211_ptr" should also be cleared in mwifiex_del_virtual_intf. Signed-off-by: Amitkumar Karwar Signed-off-by: Bing Zhao Signed-off-by: John W. Linville --- drivers/net/wireless/mwifiex/cfg80211.c | 3 +++ drivers/net/wireless/mwifiex/main.c | 6 ------ 2 files changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c index ccc9c0866b25..aeaea0e3b4c4 100644 --- a/drivers/net/wireless/mwifiex/cfg80211.c +++ b/drivers/net/wireless/mwifiex/cfg80211.c @@ -2310,7 +2310,10 @@ int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct wireless_dev *wdev) unregister_netdevice(wdev->netdev); /* Clear the priv in adapter */ + priv->netdev->ieee80211_ptr = NULL; priv->netdev = NULL; + kfree(wdev); + priv->wdev = NULL; priv->media_connected = false; diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c index 42d9a68f45de..78e8a6666cc6 100644 --- a/drivers/net/wireless/mwifiex/main.c +++ b/drivers/net/wireless/mwifiex/main.c @@ -998,12 +998,6 @@ int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) wiphy_unregister(priv->wdev->wiphy); wiphy_free(priv->wdev->wiphy); - for (i = 0; i < adapter->priv_num; i++) { - priv = adapter->priv[i]; - if (priv) - kfree(priv->wdev); - } - mwifiex_terminate_workqueue(adapter); /* Unregister device */