From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F3FA9343D75; Tue, 16 Dec 2025 12:26:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765887996; cv=none; b=qQKMWOjidfGJlARNLHiwq/EsXOvv5jVdjgN+Zeb3LaOxKeBngpySXaAfr2L//HZbwWdruOCIRVXh3n1dN6keeQRr8rAy2hLB1Yj9F0iOacNLUnN2gGQPQMom8dxBap1lzkl+QakD3ddsnV2zaDR0OIqotQWRQS/36ts9QjP5L28= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765887996; c=relaxed/simple; bh=YRo0vJIJZ8Ht9YvMX2ypA3rGlfxNNKh66djMMPlPgAk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pDmUmsoBRMD+AUjU1gi4RT95/d63S/hWBPFRBaM84n8/qd7ryeJAtFHn5hg9Rq0sFD6Kw5M//Gp2YpsOzdK1TbYrtW2oMLbjQRiefQCmtxYwg43rxdxTmID4oNaKrihdtKYK4gxBgwczobu4sPM7IDKFhFB913bP+A5IxQ8uDGQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=J7rUUgOZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="J7rUUgOZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 62232C4CEF1; Tue, 16 Dec 2025 12:26:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1765887995; bh=YRo0vJIJZ8Ht9YvMX2ypA3rGlfxNNKh66djMMPlPgAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J7rUUgOZg9mE+g8nRHZdjsjK46AIR7InNsWu7F7NnB7ifsgHAxRNmMiGxMajUCS5W ZoxN6AW5BF9rpjNhekvx0YNo/TWr8jrOv264SCG3b7K6LaQb8ghkkfGtno5dJVK7nV R71CrdffqBPJxCjn1QB2Hn/+qPZ6UcTookkGQP9s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lorenzo Bianconi , Felix Fietkau , Sasha Levin Subject: [PATCH 6.18 383/614] wifi: mt76: mt7996: fix null pointer deref in mt7996_conf_tx() Date: Tue, 16 Dec 2025 12:12:30 +0100 Message-ID: <20251216111415.237812355@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251216111401.280873349@linuxfoundation.org> References: <20251216111401.280873349@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Felix Fietkau [ Upstream commit 79277f8ad15ec5f255ed0e1427c7a8a3e94e7f52 ] If a link does not have an assigned channel yet, mt7996_vif_link returns NULL. We still need to store the updated queue settings in that case, and apply them later. Move the location of the queue params to within struct mt7996_vif_link. Fixes: c0df2f0caa8d ("wifi: mt76: mt7996: prepare mt7996_mcu_set_tx for MLO support") Acked-by: Lorenzo Bianconi Link: https://patch.msgid.link/20250929111723.52486-1-nbd@nbd.name Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt7996/main.c | 6 +++--- drivers/net/wireless/mediatek/mt76/mt7996/mcu.c | 5 ++++- drivers/net/wireless/mediatek/mt76/mt7996/mt7996.h | 7 ++++++- 3 files changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/main.c b/drivers/net/wireless/mediatek/mt76/mt7996/main.c index 581314368c5ba..b53ca702591c6 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c @@ -665,8 +665,8 @@ mt7996_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, unsigned int link_id, u16 queue, const struct ieee80211_tx_queue_params *params) { - struct mt7996_dev *dev = mt7996_hw_dev(hw); - struct mt7996_vif_link *mlink = mt7996_vif_link(dev, vif, link_id); + struct mt7996_vif *mvif = (struct mt7996_vif *)vif->drv_priv; + struct mt7996_vif_link_info *link_info = &mvif->link_info[link_id]; static const u8 mq_to_aci[] = { [IEEE80211_AC_VO] = 3, [IEEE80211_AC_VI] = 2, @@ -675,7 +675,7 @@ mt7996_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, }; /* firmware uses access class index */ - mlink->queue_params[mq_to_aci[queue]] = *params; + link_info->queue_params[mq_to_aci[queue]] = *params; /* no need to update right away, we'll get BSS_CHANGED_QOS */ return 0; diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c index 0347ee0c2dd75..afa6a43bd51e5 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c @@ -3414,6 +3414,9 @@ int mt7996_mcu_set_tx(struct mt7996_dev *dev, struct ieee80211_vif *vif, #define WMM_PARAM_SET (WMM_AIFS_SET | WMM_CW_MIN_SET | \ WMM_CW_MAX_SET | WMM_TXOP_SET) struct mt7996_vif_link *link = mt7996_vif_conf_link(dev, vif, link_conf); + struct mt7996_vif *mvif = (struct mt7996_vif *)vif->drv_priv; + unsigned int link_id = link_conf->link_id; + struct mt7996_vif_link_info *link_info = &mvif->link_info[link_id]; struct { u8 bss_idx; u8 __rsv[3]; @@ -3431,7 +3434,7 @@ int mt7996_mcu_set_tx(struct mt7996_dev *dev, struct ieee80211_vif *vif, skb_put_data(skb, &hdr, sizeof(hdr)); for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { - struct ieee80211_tx_queue_params *q = &link->queue_params[ac]; + struct ieee80211_tx_queue_params *q = &link_info->queue_params[ac]; struct edca *e; struct tlv *tlv; diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mt7996.h b/drivers/net/wireless/mediatek/mt76/mt7996/mt7996.h index 8ec2acdb33193..718e4d4ad85f2 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mt7996.h +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mt7996.h @@ -253,16 +253,21 @@ struct mt7996_vif_link { struct mt7996_sta_link msta_link; struct mt7996_phy *phy; - struct ieee80211_tx_queue_params queue_params[IEEE80211_NUM_ACS]; struct cfg80211_bitrate_mask bitrate_mask; u8 mld_idx; }; +struct mt7996_vif_link_info { + struct ieee80211_tx_queue_params queue_params[IEEE80211_NUM_ACS]; +}; + struct mt7996_vif { struct mt7996_vif_link deflink; /* must be first */ struct mt76_vif_data mt76; + struct mt7996_vif_link_info link_info[IEEE80211_MLD_MAX_NUM_LINKS]; + u8 mld_group_idx; u8 mld_remap_idx; }; -- 2.51.0