From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Jonas Jelonek <jelonek.jonas@gmail.com>,
Johannes Berg <johannes.berg@intel.com>,
Sasha Levin <sashal@kernel.org>,
johannes@sipsolutions.net, kvalo@kernel.org, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 1/6] wifi: mac80211_hwsim: fix debugfs attribute ps with rc table support
Date: Fri, 18 Nov 2022 21:16:25 -0500 [thread overview]
Message-ID: <20221119021630.1775586-1-sashal@kernel.org> (raw)
From: Jonas Jelonek <jelonek.jonas@gmail.com>
[ Upstream commit 69188df5f6e4cecc6b76b958979ba363cd5240e8 ]
Fixes a warning that occurs when rc table support is enabled
(IEEE80211_HW_SUPPORTS_RC_TABLE) in mac80211_hwsim and the PS mode
is changed via the exported debugfs attribute.
When the PS mode is changed, a packet is broadcasted via
hwsim_send_nullfunc by creating and transmitting a plain skb with only
header initialized. The ieee80211 rate array in the control buffer is
zero-initialized. When ratetbl support is enabled, ieee80211_get_tx_rates
is called for the skb with sta parameter set to NULL and thus no
ratetbl can be used. The final rate array then looks like
[-1,0; 0,0; 0,0; 0,0] which causes the warning in ieee80211_get_tx_rate.
The issue is fixed by setting the count of the first rate with idx '0'
to 1 and hence ieee80211_get_tx_rates won't overwrite it with idx '-1'.
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mac80211_hwsim.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 55cca2ffa392..d3905e70b1e9 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -670,6 +670,7 @@ static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
+ struct ieee80211_tx_info *cb;
if (!vp->assoc)
return;
@@ -690,6 +691,10 @@ static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
memcpy(hdr->addr2, mac, ETH_ALEN);
memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
+ cb = IEEE80211_SKB_CB(skb);
+ cb->control.rates[0].count = 1;
+ cb->control.rates[1].idx = -1;
+
rcu_read_lock();
mac80211_hwsim_tx_frame(data->hw, skb,
rcu_dereference(vif->chanctx_conf)->def.chan);
--
2.35.1
next reply other threads:[~2022-11-19 2:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-19 2:16 Sasha Levin [this message]
2022-11-19 2:16 ` [PATCH AUTOSEL 4.14 3/6] wifi: mac80211: Fix ack frame idr leak when mesh has no route Sasha Levin
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