This is a note to let you know that I've just added the patch titled
wifi: mac80211: ensure beacon is non-S1G prior to extracting the beacon timestamp field
to the 6.1-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-ensure-beacon-is-non-s1g-prior-to-extr.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 545470aa4acfcdde85cc410fc934c9dc9e791590
Author: Richard Kinder <richard.kinder@xxxxxxxxx>
Date: Thu Mar 28 11:57:25 2024 +1100
wifi: mac80211: ensure beacon is non-S1G prior to extracting the beacon timestamp field
[ Upstream commit d12b9779cc9ba29d65fbfc728eb8a037871dd331 ]
Logic inside ieee80211_rx_mgmt_beacon accesses the
mgmt->u.beacon.timestamp field without first checking whether the beacon
received is non-S1G format.
Fix the problem by checking the beacon is non-S1G format to avoid access
of the mgmt->u.beacon.timestamp field.
Signed-off-by: Richard Kinder <richard.kinder@xxxxxxxxx>
Link: https://msgid.link/20240328005725.85355-1-richard.kinder@xxxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index f25dc6931a5b1..9a5530ca2f6b2 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -5528,7 +5528,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link,
link->u.mgd.dtim_period = elems->dtim_period;
link->u.mgd.have_beacon = true;
ifmgd->assoc_data->need_beacon = false;
- if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) {
+ if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) &&
+ !ieee80211_is_s1g_beacon(hdr->frame_control)) {
link->conf->sync_tsf =
le64_to_cpu(mgmt->u.beacon.timestamp);
link->conf->sync_device_ts =
