cfg80211: clear wext keys when freeing and removing them
When freeing the keys stored for wireless extensions, clear the memory
to avoid having the key material stick around in memory "forever".
Similarly, when userspace overwrites a key, actually clear it instead
of just setting the key length to zero.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 9698fe70..55ec9be 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -1007,7 +1007,7 @@
rdev->devlist_generation++;
cfg80211_mlme_purge_registrations(wdev);
#ifdef CONFIG_CFG80211_WEXT
- kfree(wdev->wext.keys);
+ kzfree(wdev->wext.keys);
#endif
}
/*