A non-MLD sta could want to send offchannel management frame (e.g. to
do a offchannel scan). Because ieee80211_rx_for_interface() fills the
link_id information with the link the sta is currently using; hostapd
would send back management frame responses through wrong link causing
the sta to miss them.
To fix that, do not fill link_id indication for management frames,
relying on hostapd instead to infer the proper link from the received
frame frequency.
Signed-off-by: Remi Pommarel <repk@xxxxxxxxxxxx>
---
net/mac80211/rx.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index e73431549ce7..deebdce6d9c7 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -5112,9 +5112,14 @@ static bool ieee80211_rx_for_interface(struct ieee80211_rx_data *rx,
* have the link information if needed.
*/
link_sta = link_sta_info_get_bss(rx->sdata, hdr->addr2);
+
if (link_sta) {
sta = link_sta->sta;
- link_id = link_sta->link_id;
+ /* Do no use sta link id information on management frames to allow for
+ * offchannel scan, roaming, etc.
+ */
+ if (!ieee80211_is_mgmt(hdr->frame_control))
+ link_id = link_sta->link_id;
} else {
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
--
2.40.0
