wifi: mac80211: ocb: skip rx_no_sta when interface is not joined

ieee80211_ocb_rx_no_sta() assumes a valid channel context, which is only
present after JOIN_OCB.

RX may run before JOIN_OCB is executed, in which case the OCB interface
is not operational. Skip RX peer handling when the interface is not
joined to avoid warnings in the RX path.

Reported-by: syzbot+b364457b2d1d4e4a3054@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=b364457b2d1d4e4a3054
Tested-by: syzbot+b364457b2d1d4e4a3054@syzkaller.appspotmail.com
Signed-off-by: Moon Hee Lee <moonhee.lee.ca@gmail.com>
Link: https://patch.msgid.link/20251216035932.18332-1-moonhee.lee.ca@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/ocb.c b/net/mac80211/ocb.c
index a5d4358f122ae485ad02151653e5724c8ef1a20d..ebb4f4d88c237f7869069311b6c9a8ca9eed2a88 100644 (file)
--- a/net/mac80211/ocb.c
+++ b/net/mac80211/ocb.c
@@ -47,6 +47,9 @@ void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
        struct sta_info *sta;
        int band;
 
+       if (!ifocb->joined)
+               return;
+
        /* XXX: Consider removing the least recently used entry and
         *      allow new one to be added.
         */