diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2011-01-03 19:42:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 15:13:51 -0800 |
| commit | a8767f2c394355cf72898f528a901040a7f36881 (patch) | |
| tree | 1431fe189c85d397ea5c029e7a13af0f4ac7386c | |
| parent | 3524a55c6994c9a0c5f32cbdaf701c89e0b67b52 (diff) | |
mac80211: add missing synchronize_rcu
commit d2460f4b2fa6dbdeec800414f9cf5b1fc8b71197 upstream.
commit ad0e2b5a00dbec303e4682b403bb6703d11dcdb2
Author: Johannes Berg <johannes.berg@intel.com>
Date: Tue Jun 1 10:19:19 2010 +0200
mac80211: simplify key locking
removed the synchronization against RCU and thus
opened a race window where we can use a key for
TX while it is already freed. Put a synchronisation
into the right place to close that window.
Reported-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | net/mac80211/key.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/mac80211/key.c b/net/mac80211/key.c index ccd676b2f59..aa1b734a5e9 100644 --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -366,6 +366,12 @@ static void __ieee80211_key_destroy(struct ieee80211_key *key) if (!key) return; + /* + * Synchronize so the TX path can no longer be using + * this key before we free/remove it. + */ + synchronize_rcu(); + if (key->local) ieee80211_key_disable_hw_accel(key); |