wifi: mac80211: reject TDLS operations when station is not associated

[ Upstream commit 16ecdab5446f15a61ec88eb0d23d25d009821db0 ]

syzbot triggered a WARN in ieee80211_tdls_oper() by sending
NL80211_TDLS_ENABLE_LINK immediately after NL80211_CMD_CONNECT,
before association completed and without prior TDLS setup.

This left internal state like sdata->u.mgd.tdls_peer uninitialized,
leading to a WARN_ON() in code paths that assumed it was valid.

Reject the operation early if not in station mode or not associated.

Reported-by: syzbot+f73f203f8c9b19037380@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=f73f203f8c9b19037380
Fixes: 81dd2b882241 ("mac80211: move TDLS data to mgd private part")
Tested-by: syzbot+f73f203f8c9b19037380@syzkaller.appspotmail.com
Signed-off-by: Moon Hee Lee <moonhee.lee.ca@gmail.com>
Link: https://patch.msgid.link/20250715230904.661092-2-moonhee.lee.ca@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index f07b409164854ce2046719ff8edd900c43621391..1cb42c5b9b04b0564665af1fb30066fc2b83b8d2 100644 (file)
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -1421,7 +1421,7 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
        if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
                return -EOPNOTSUPP;
 
-       if (sdata->vif.type != NL80211_IFTYPE_STATION)
+       if (sdata->vif.type != NL80211_IFTYPE_STATION || !sdata->vif.cfg.assoc)
                return -EINVAL;
 
        switch (oper) {