wifi: mt76: mt7996: fix NULL pointer dereference in mt7996_mcu_sta_bfer_he

commit f503ae90c7355e8506e68498fe84c1357894cd5b upstream.

Fix the NULL pointer dereference in mt7996_mcu_sta_bfer_he
routine adding an sta interface to the mt7996 driver.

Found by code review.

Cc: stable@vger.kernel.org
Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://patch.msgid.link/20240813081242.3991814-1-make24@iscas.ac.cn
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
index 9176905451b5071093847e8ac87d82dfc4c2755f..36ab59885cf2b615e66ed055a523cb53c2a7302e 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
@@ -1544,6 +1544,9 @@ mt7996_mcu_sta_bfer_he(struct ieee80211_sta *sta, struct ieee80211_vif *vif,
        u8 nss_mcs = mt7996_mcu_get_sta_nss(mcs_map);
        u8 snd_dim, sts;
 
+       if (!vc)
+               return;
+
        bf->tx_mode = MT_PHY_TYPE_HE_SU;
 
        mt7996_mcu_sta_sounding_rate(bf);