6.11-stable review patch. If anyone has any objections, please let me know.
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From: Ping-Ke Shih pkshih@realtek.com
[ 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/6ab2dc9c3afe753ca6fdcdd1421e7a1f47e87...
Reported-by: syzbot+8dd98a9e98ee28dc484a@syzkaller.appspotmail.com Closes: https://lore.kernel.org/linux-wireless/000000000000fdef8706191a3f7b@google.c... Fixes: 9df66d5b9f45 ("cfg80211: fix default HE tx bitrate mask in 2G band") Signed-off-by: Ping-Ke Shih pkshih@realtek.com Link: https://patch.msgid.link/20240729074816.20323-1-pkshih@realtek.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- include/net/mac80211.h | 7 ++++--- net/mac80211/offchannel.c | 1 + net/mac80211/rate.c | 2 +- net/mac80211/scan.c | 2 +- net/mac80211/tx.c | 2 +- 5 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 0a04eaf5343c6..fae37598c1106 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -994,8 +994,9 @@ 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 @@ -1016,7 +1017,7 @@ 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 28d03196ef75a..29fab7ae47b4c 100644 --- a/net/mac80211/offchannel.c +++ b/net/mac80211/offchannel.c @@ -997,6 +997,7 @@ 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];