This is a note to let you know that I've just added the patch titled
wifi: mac80211: don't use rate mask for offchannel TX either
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mac80211-don-t-use-rate-mask-for-offchannel-tx-.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit dd42ea5ff78672fb073cf2f3037c97246c1e37ad
Author: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Date: Mon Jul 29 15:48:16 2024 +0800
wifi: mac80211: don't use rate mask for offchannel TX either
[ Upstream commit e7a7ef9a0742dbd0818d5b15fba2c5313ace765b ]
Like the commit ab9177d83c04 ("wifi: mac80211: don't use rate mask for
scanning"), ignore incorrect settings to avoid no supported rate warning
reported by syzbot.
The syzbot did bisect and found cause is commit 9df66d5b9f45 ("cfg80211:
fix default HE tx bitrate mask in 2G band"), which however corrects
bitmask of HE MCS and recognizes correctly settings of empty legacy rate
plus HE MCS rate instead of returning -EINVAL.
As suggestions [1], follow the change of SCAN TX to consider this case of
offchannel TX as well.
[1] https://lore.kernel.org/linux-wireless/6ab2dc9c3afe753ca6fdcdd1421e7a1f47e87b84.camel@xxxxxxxxxxxxxxxx/T/#m2ac2a6d2be06a37c9c47a3d8a44b4f647ed4f024
Reported-by: syzbot+8dd98a9e98ee28dc484a@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://lore.kernel.org/linux-wireless/000000000000fdef8706191a3f7b@xxxxxxxxxx/
Fixes: 9df66d5b9f45 ("cfg80211: fix default HE tx bitrate mask in 2G band")
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Link: https://patch.msgid.link/20240729074816.20323-1-pkshih@xxxxxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 45ad37adbe328..7b3f56d862de4 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -953,8 +953,9 @@ enum mac80211_tx_info_flags {
* of their QoS TID or other priority field values.
* @IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX: first MLO TX, used mostly internally
* for sequence number assignment
- * @IEEE80211_TX_CTRL_SCAN_TX: Indicates that this frame is transmitted
- * due to scanning, not in normal operation on the interface.
+ * @IEEE80211_TX_CTRL_DONT_USE_RATE_MASK: Don't use rate mask for this frame
+ * which is transmitted due to scanning or offchannel TX, not in normal
+ * operation on the interface.
* @IEEE80211_TX_CTRL_MLO_LINK: If not @IEEE80211_LINK_UNSPECIFIED, this
* frame should be transmitted on the specific link. This really is
* only relevant for frames that do not have data present, and is
@@ -975,7 +976,7 @@ enum mac80211_tx_control_flags {
IEEE80211_TX_CTRL_NO_SEQNO = BIT(7),
IEEE80211_TX_CTRL_DONT_REORDER = BIT(8),
IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX = BIT(9),
- IEEE80211_TX_CTRL_SCAN_TX = BIT(10),
+ IEEE80211_TX_CTRL_DONT_USE_RATE_MASK = BIT(10),
IEEE80211_TX_CTRL_MLO_LINK = 0xf0000000,
};
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index 65e1e9e971fd6..5810d938edc44 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -964,6 +964,7 @@ int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
}
IEEE80211_SKB_CB(skb)->flags = flags;
+ IEEE80211_SKB_CB(skb)->control.flags |= IEEE80211_TX_CTRL_DONT_USE_RATE_MASK;
skb->dev = sdata->dev;
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 4dc1def695486..3dc9752188d58 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -890,7 +890,7 @@ void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
if (ieee80211_is_tx_data(skb))
rate_control_apply_mask(sdata, sta, sband, dest, max_rates);
- if (!(info->control.flags & IEEE80211_TX_CTRL_SCAN_TX))
+ if (!(info->control.flags & IEEE80211_TX_CTRL_DONT_USE_RATE_MASK))
mask = sdata->rc_rateidx_mask[info->band];
if (dest[0].idx < 0)
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index b5f2df61c7f67..1c5d99975ad04 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -649,7 +649,7 @@ static void ieee80211_send_scan_probe_req(struct ieee80211_sub_if_data *sdata,
cpu_to_le16(IEEE80211_SN_TO_SEQ(sn));
}
IEEE80211_SKB_CB(skb)->flags |= tx_flags;
- IEEE80211_SKB_CB(skb)->control.flags |= IEEE80211_TX_CTRL_SCAN_TX;
+ IEEE80211_SKB_CB(skb)->control.flags |= IEEE80211_TX_CTRL_DONT_USE_RATE_MASK;
ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
}
}
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index bca7b341dd772..a9ee869822592 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -699,7 +699,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
txrc.skb = tx->skb;
txrc.reported_rate.idx = -1;
- if (unlikely(info->control.flags & IEEE80211_TX_CTRL_SCAN_TX)) {
+ if (unlikely(info->control.flags & IEEE80211_TX_CTRL_DONT_USE_RATE_MASK)) {
txrc.rate_idx_mask = ~0;
} else {
txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
