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wifi: mac80211: don't use rate mask for scanning 

[ Upstream commit ab9177d83c ]

The rate mask is intended for use during operation, and
can be set to only have masks for the currently active
band. As such, it cannot be used for scanning which can
be on other bands as well.

Simply ignore the rate masks during scanning to avoid
warnings from incorrect settings.

Reported-by: syzbot+fdc5123366fb9c3fdc6d@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=fdc5123366fb9c3fdc6d
Co-developed-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Tested-by: Dmitry Antipov <dmantipov@yandex.ru>
Link: https://msgid.link/20240326220854.9594cbb418ca.I7f86c0ba1f98cf7e27c2bacf6c2d417200ecea5c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johannes Berg 2024-03-26 22:08:54 +01:00 committed by Greg Kroah-Hartman
parent c16b3e290b
commit d88d383920
4 changed files with 18 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/mac80211.h
View File

@ -932,6 +932,8 @@ 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_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
@ -952,6 +954,7 @@ 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_MLO_LINK = 0xf0000000,
};

6
net/mac80211/rate.c
View File

@ -877,6 +877,7 @@ void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
struct ieee80211_sub_if_data *sdata;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_supported_band *sband;
u32 mask = ~0;
rate_control_fill_sta_table(sta, info, dest, max_rates);
@ -889,9 +890,12 @@ 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))
mask = sdata->rc_rateidx_mask[info->band];
if (dest[0].idx < 0)
__rate_control_send_low(&sdata->local->hw, sband, sta, info,
sdata->rc_rateidx_mask[info->band]);
mask);
if (sta)
rate_fixup_ratelist(vif, sband, info, dest, max_rates);

1
net/mac80211/scan.c
View File

@ -638,6 +638,7 @@ 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_tx_skb_tid_band(sdata, skb, 7, channel->band);
}
}

13
net/mac80211/tx.c
View File

@ -701,11 +701,16 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
txrc.bss_conf = &tx->sdata->vif.bss_conf;
txrc.skb = tx->skb;
txrc.reported_rate.idx = -1;
txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
if (tx->sdata->rc_has_mcs_mask[info->band])
txrc.rate_idx_mcs_mask =
tx->sdata->rc_rateidx_mcs_mask[info->band];
if (unlikely(info->control.flags & IEEE80211_TX_CTRL_SCAN_TX)) {
txrc.rate_idx_mask = ~0;
} else {
txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
if (tx->sdata->rc_has_mcs_mask[info->band])
txrc.rate_idx_mcs_mask =
tx->sdata->rc_rateidx_mcs_mask[info->band];
}
txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||