From: Benjamin Berg <benjamin.berg@intel.com>
Date: Thu, 2 Jan 2025 14:20:05 +0000 (+0200)
Subject: wifi: mac80211: set key link ID to the deflink one
X-Git-Tag: v6.14-rc1~162^2~20^2~12
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6bd9a087c8035626e7bfb6b678c9e036b8b26038;p=thirdparty%2Fkernel%2Flinux.git

wifi: mac80211: set key link ID to the deflink one

When in non-MLO mode, the key ID was set to -1 even for keys that are
not pairwise. Change the link ID to be the link ID of the deflink in
this case so that drivers do not need to special cases for this.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250102161730.0c066f084677.I4a5c288465e75119edb6a0df90dddf6f30d14a02@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 0d7ddaa952ff0..c3ed2fcff8b79 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2229,7 +2229,7 @@ enum ieee80211_key_flags {
  * 	- Temporal Authenticator Rx MIC Key (64 bits)
  * @icv_len: The ICV length for this key type
  * @iv_len: The IV length for this key type
- * @link_id: the link ID for MLO, or -1 for non-MLO or pairwise keys
+ * @link_id: the link ID, 0 for non-MLO, or -1 for pairwise keys
  */
 struct ieee80211_key_conf {
 	atomic64_t tx_pn;
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index ae12c5dc74e6a..9351c64608a99 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -503,6 +503,9 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 	if (IS_ERR(link))
 		return PTR_ERR(link);
 
+	if (WARN_ON(pairwise && link_id >= 0))
+		return -EINVAL;
+
 	if (pairwise && params->mode == NL80211_KEY_SET_TX)
 		return ieee80211_set_tx(sdata, mac_addr, key_idx);
 
@@ -525,10 +528,12 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 	if (IS_ERR(key))
 		return PTR_ERR(key);
 
-	key->conf.link_id = link_id;
-
-	if (pairwise)
+	if (pairwise) {
 		key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
+		key->conf.link_id = -1;
+	} else {
+		key->conf.link_id = link->link_id;
+	}
 
 	if (params->mode == NL80211_KEY_NO_TX)
 		key->conf.flags |= IEEE80211_KEY_FLAG_NO_AUTO_TX;
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 67ecfea229829..dcf8643a0baa5 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -1409,7 +1409,7 @@ ieee80211_gtk_rekey_add(struct ieee80211_vif *vif,
 	if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
 		key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 
-	key->conf.link_id = link_id;
+	key->conf.link_id = link_data->link_id;
 
 	err = ieee80211_key_link(key, link_data, NULL);
 	if (err)