From 6ff9f07cdd7f83075c0891fcb3d1bda86bf8674e Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 26 Feb 2026 18:36:07 +0100 Subject: [PATCH] wifi: move action code from per-type frame structs The action code actually serves to identify the type of action frame, so it really isn't part of the per-type structure. Pull it out and have it in the general action frame format. In theory, whether or not the action code is present in this way is up to each category, but all categories that are defined right now all have that value. While at it, and since this change requires changing all users, remove the 'u' and make it an anonymous union in this case, so that all code using this changes. Change IEEE80211_MIN_ACTION_SIZE to take an argument which says how much of the frame is needed, e.g. category, action_code or the specific frame type that's defined in the union. Again this also ensures that all code is updated. In some cases, fix bugs where the SKB length was checked after having accessed beyond the checked length, in particular in FTM code, e.g. ieee80211_is_ftm(). Link: https://patch.msgid.link/20260226183607.67e71846b59e.I9a24328e3ffcaae179466a935f1c3345029f9961@changeid Signed-off-by: Johannes Berg --- mt76_connac_mac.c | 6 +++--- mt7925/mac.c | 4 ++-- mt7996/mac.c | 4 ++-- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/mt76_connac_mac.c b/mt76_connac_mac.c index 0f6738ad..8a8d608d 100644 --- a/mt76_connac_mac.c +++ b/mt76_connac_mac.c @@ -422,10 +422,10 @@ mt76_connac2_mac_write_txwi_80211(struct mt76_dev *dev, __le32 *txwi, u32 val; if (ieee80211_is_action(fc) && - skb->len >= IEEE80211_MIN_ACTION_SIZE + 1 && + skb->len >= IEEE80211_MIN_ACTION_SIZE(addba_req.capab) && mgmt->u.action.category == WLAN_CATEGORY_BACK && - mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ) { - u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); + mgmt->u.action.action_code == WLAN_ACTION_ADDBA_REQ) { + u16 capab = le16_to_cpu(mgmt->u.action.addba_req.capab); txwi[5] |= cpu_to_le32(MT_TXD5_ADD_BA); tid = (capab >> 2) & IEEE80211_QOS_CTL_TID_MASK; diff --git a/mt7925/mac.c b/mt7925/mac.c index 9fbafccd..101f571b 100644 --- a/mt7925/mac.c +++ b/mt7925/mac.c @@ -687,9 +687,9 @@ mt7925_mac_write_txwi_80211(struct mt76_dev *dev, __le32 *txwi, u32 val; if (ieee80211_is_action(fc) && - skb->len >= IEEE80211_MIN_ACTION_SIZE + 1 && + skb->len >= IEEE80211_MIN_ACTION_SIZE(action_code) && mgmt->u.action.category == WLAN_CATEGORY_BACK && - mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ) + mgmt->u.action.action_code == WLAN_ACTION_ADDBA_REQ) tid = MT_TX_ADDBA; else if (ieee80211_is_mgmt(hdr->frame_control)) tid = MT_TX_NORMAL; diff --git a/mt7996/mac.c b/mt7996/mac.c index 36d61d0d..75a391c4 100644 --- a/mt7996/mac.c +++ b/mt7996/mac.c @@ -774,9 +774,9 @@ mt7996_mac_write_txwi_80211(struct mt7996_dev *dev, __le32 *txwi, u32 val; if (ieee80211_is_action(fc) && - skb->len >= IEEE80211_MIN_ACTION_SIZE + 1 && + skb->len >= IEEE80211_MIN_ACTION_SIZE(action_code) && mgmt->u.action.category == WLAN_CATEGORY_BACK && - mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ) { + mgmt->u.action.action_code == WLAN_ACTION_ADDBA_REQ) { if (is_mt7990(&dev->mt76)) txwi[6] |= cpu_to_le32(FIELD_PREP(MT_TXD6_TID_ADDBA, tid)); else