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authorKalle Valo <kalle.valo@iki.fi>2010-01-23 20:27:14 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-01-23 16:47:00 -0500
commit3b43a18743421cccd33902e29016fa49b2d52dbb (patch)
treeeaaab22a16260625854a51076fe64d5787e98ac4
parentf12553ebe045a8a40ab33fa500fb57d10706e226 (diff)
mac80211: fix tx select key null pointer crash with hostapdmaster-2010-01-23
Pavel Roskin reported a crash in ieee80211_tx_h_select_key(): http://marc.info/?l=linux-wireless&m=126419655108528&w=2 This is a regression from patch "mac80211: move control.hw_key assignment". Fix it as suggested by Johannes, adding an else statement to make sure that tx->key is not accessed when it's null. Compile-tested only. Reported-by: Pavel Roskin <proski@gnu.org> Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Kalle Valo <kalle.valo@iki.fi> Tested-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--net/mac80211/tx.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index fcfa988a37a..d017b3530d4 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -547,9 +547,10 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
!ieee80211_use_mfp(hdr->frame_control, tx->sta,
tx->skb))
tx->key = NULL;
- skip_hw = (tx->key->conf.flags &
- IEEE80211_KEY_FLAG_SW_MGMT) &&
- ieee80211_is_mgmt(hdr->frame_control);
+ else
+ skip_hw = (tx->key->conf.flags &
+ IEEE80211_KEY_FLAG_SW_MGMT) &&
+ ieee80211_is_mgmt(hdr->frame_control);
break;
case ALG_AES_CMAC:
if (!ieee80211_is_mgmt(hdr->frame_control))