github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-26 10:02:02 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

wifi: mac80211: don't drop scan probe requests for lack of peer rates

Browse Source 
While software scanning, ieee80211_tx_h_rate_ctrl() warns and drops the
frame if the target station has no usable bitrate on the band that's
currently being scanned.

But that's really meant for data frames, not if we happen to scan for
the BSSID on the wrong band, which can be constructed easily.

Skip the check for IEEE80211_TX_CTRL_DONT_USE_RATE_MASK, the previous
commit also ignored the station rate mask for such frames as well.

Assisted-by: LLM
Reported-by: syzbot+0d516b33238bd97ee864@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=0d516b33238bd97ee864
Link: https://patch.msgid.link/20260904165722.b57ea4ab82d3.Id6c9c42d5cef5901bfac88853647b03ba4077b3e@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2026-09-04 16:57:06 +02:00
parent f5dd0626d2
commit 23c68b4aaf
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/mac80211/tx.c
View File

@ -744,10 +744,12 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
/*
* Lets not bother rate control if we're associated and cannot
* talk to the sta. This should not happen.
* Lets not bother rate control if we're associated and cannot talk to
* the sta. This should not happen - except for frames that aren't
* really for the peer to start with and already ignore rates.
*/
if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
if (!(info->control.flags & IEEE80211_TX_CTRL_DONT_USE_RATE_MASK) &&
WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
!rate_usable_index_exists(sband, &tx->sta->sta),
"%s: Dropped data frame as no usable bitrate found while "
"scanning and associated. Target station: "