linux-kernel - [PATCH AUTOSEL 6.9 15/44] wifi: mac80211: apply mcast rate only if interface is up

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Date: Tue, 18 Jun 2024 08:34:56 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Johannes Berg <johannes.berg@...el.com>,
	syzbot+de87c09cc7b964ea2e23@...kaller.appspotmail.com,
	Sasha Levin <sashal@...nel.org>,
	johannes@...solutions.net,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 6.9 15/44] wifi: mac80211: apply mcast rate only if interface is up

From: Johannes Berg <johannes.berg@...el.com>

[ Upstream commit 02c665f048a439c0d58cc45334c94634bd7c18e6 ]

If the interface isn't enabled, don't apply multicast
rate changes immediately.

Reported-by: syzbot+de87c09cc7b964ea2e23@...kaller.appspotmail.com
Link: https://msgid.link/20240515133410.d6cffe5756cc.I47b624a317e62bdb4609ff7fa79403c0c444d32d@changeid
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/mac80211/cfg.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 07abaf7820c56..b70edd8e40ae9 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2954,8 +2954,9 @@ static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
 	memcpy(sdata->vif.bss_conf.mcast_rate, rate,
 	       sizeof(int) * NUM_NL80211_BANDS);
 
-	ieee80211_link_info_change_notify(sdata, &sdata->deflink,
-					  BSS_CHANGED_MCAST_RATE);
+	if (ieee80211_sdata_running(sdata))
+		ieee80211_link_info_change_notify(sdata, &sdata->deflink,
+						  BSS_CHANGED_MCAST_RATE);
 
 	return 0;
 }
-- 
2.43.0