wifi: mac80211: reject per-band vendor elements with MLO

The MLME code doesn't currently handle adding vendor elements
correctly with multi-link due to element inheritance. Simply
prevent that for now completely, if someone needs it we can
fix this later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250101070249.bb82d3aaf6ef.Ib30573d0666430a3d7a905e513dfc661edf0bf65@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index f13c14fa82e88d8f8cafa444edb3d4405c665e33..53e5aee4688569fb1291becbb9dc218ae4d47749 100644 (file)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1310,6 +1310,11 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                            sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
                            !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap))
                                return -EINVAL;
+
+                       /* no support for per-band vendor elems with MLO */
+                       if (WARN_ON(iftd->vendor_elems.len &&
+                                   hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
+                               return -EINVAL;
                }
 
                /* HT, VHT, HE require QoS, thus >= 4 queues */