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wifi: mac80211: ensure beacon is non-S1G prior to extracting the beacon timestamp field

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[ Upstream commit d12b9779cc ]

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@gmail.com>
Link: https://msgid.link/20240328005725.85355-1-richard.kinder@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Richard Kinder 2024-03-28 11:57:25 +11:00 committed by Greg Kroah-Hartman
parent 0cfadb49ef
commit ea2121cdc7
1 changed files with 2 additions and 1 deletions
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3
net/mac80211/mlme.c
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@ -5979,7 +5979,8 @@ 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 =