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wifi: mac80211: don't apply peer rates to off-channel frames

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All the off-channel frames (including scan) aren't really part of
the connection, so don't apply the station rates even if they're
being sent to the station in question (e.g. by accident). They
don't use the rate mask via IEEE80211_TX_CTRL_DONT_USE_RATE_MASK,
but the station might not have rates of them either, hitting the
warning found by syzbot.

Assisted-by: LLM
Reported-by: syzbot+34463a129786910405dd@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=34463a129786910405dd
Link: https://patch.msgid.link/20260904165722.ade6b07421b8.I59b7ea810eb021a7a68b3090828a757b6dd85e57@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2026-09-04 16:57:05 +02:00
parent f4e72e3758
commit f5dd0626d2
1 changed files with 8 additions and 0 deletions
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8
net/mac80211/rate.c
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@ -372,6 +372,14 @@ static void __rate_control_send_low(struct ieee80211_hw *hw,
u32 rate_flags = 0;
int i;
/*
* Frames that shouldn't use the rate mask could be anything,
* even on a different band, so don't take the sta into account
* to avoid ending up without rates.
*/
if (info->control.flags & IEEE80211_TX_CTRL_DONT_USE_RATE_MASK)
sta = NULL;
if (sband->band == NL80211_BAND_S1GHZ) {
info->control.rates[0].flags |= IEEE80211_TX_RC_S1G_MCS;
info->control.rates[0].idx = 0;