From fa83a2189870cdcd6fb4deeed391e0b988dc9a19 Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Mon, 29 Mar 2010 23:36:15 -0700 Subject: [PATCH] mac80211: Fix dropping of unprotected robust multicast frames When selecting the RX key for group-addressed robust management frames, we do not actually select any BIP key if the frame is unprotected (since we cannot find the key index from MMIE). This results in the drop_unencrypted check in failing to drop the frame. It is enough to verify that we have a STA entry for the transmitter and that MFP is enabled for that STA; we do not need to check rx->key here. This fixes BIP processing for unprotected, group-addressed, robust management frames. Signed-off-by: Jouni Malinen Signed-off-by: John W. Linville --- net/mac80211/rx.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 11ed5aa90f83..ea71e1abc4c8 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -1421,8 +1421,7 @@ ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) return -EACCES; /* BIP does not use Protected field, so need to check MMIE */ if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && - ieee80211_get_mmie_keyidx(rx->skb) < 0 && - rx->key)) + ieee80211_get_mmie_keyidx(rx->skb) < 0)) return -EACCES; /* * When using MFP, Action frames are not allowed prior to -- GitLab