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mac80211: fix another key non-race 

The code here is only not racy because all the
places that assign the pointers it uses are
holding the sta_mtx as well as the key_mtx and
so can't race against this because this code
holds the sta_mtx. But that's not intuitive,
so fix it to hold the key_mtx.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2011-05-12 15:07:15 +02:00 committed by John W. Linville
parent 5c0c36412b
commit 8cb231530f
1 changed files with 4 additions and 2 deletions
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6
net/mac80211/sta_info.c
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@ -652,10 +652,12 @@ static int __must_check __sta_info_destroy(struct sta_info *sta)
if (ret)
return ret;
mutex_lock(&local->key_mtx);
for (i = 0; i < NUM_DEFAULT_KEYS; i++)
ieee80211_key_free(local, sta->gtk[i]);
__ieee80211_key_free(sta->gtk[i]);
if (sta->ptk)
ieee80211_key_free(local, sta->ptk);
__ieee80211_key_free(sta->ptk);
mutex_unlock(&local->key_mtx);
sta->dead = true;