From 6a6f457ed5fdf6777536c20644a9e42128a50ec2 Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sat, 22 Jan 2022 15:58:58 +0100
Subject: [PATCH] mt76: mt7615: check sta_rates pointer in mt7615_sta_rate_tbl_update
Git-commit: 6a6f457ed5fdf6777536c20644a9e42128a50ec2
Patch-mainline: v5.18-rc1
References: git-fixes
Check sta_rates pointer value in mt7615_sta_rate_tbl_update routine
since minstrel_ht_update_rates can fail allocating rates array.
Fixes: 04b8e65922f63 ("mt76: add mac80211 driver for MT7615 PCIe-based chipsets")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/mediatek/mt76/mt7615/main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/main.c b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
index 9f7ac78f1222..fca38f0e1a27 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
@@ -689,6 +689,9 @@ static void mt7615_sta_rate_tbl_update(struct ieee80211_hw *hw,
struct ieee80211_sta_rates *sta_rates = rcu_dereference(sta->rates);
int i;
+ if (!sta_rates)
+ return;
+
spin_lock_bh(&dev->mt76.lock);
for (i = 0; i < ARRAY_SIZE(msta->rates); i++) {
msta->rates[i].idx = sta_rates->rate[i].idx;
--
2.31.1