6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Aditya Kumar Singh aditya.kumar.singh@oss.qualcomm.com
[ Upstream commit 32d340ae675800672e1219444a17940a8efe5cca ]
In ieee80211_rx_handle_packet(), if the caller does not provide pubsta information, an attempt is made to find the station using the address 2 (source address) field in the header. Since pubsta is missing, link information such as link_valid and link_id is also unavailable. Now if such a situation comes, and if a matching ML station entry is found based on the source address, currently the packet is dropped due to missing link ID in the status field which is not correct.
Hence, to fix this issue, if link_valid is not set and the station is an ML station, make an attempt to find a link station entry using the source address. If a valid link station is found, derive the link ID and proceed with packet processing. Otherwise, drop the packet as per the existing flow.
Fixes: ea9d807b5642 ("wifi: mac80211: add link information in ieee80211_rx_status") Suggested-by: Vasanthakumar Thiagarajan vasanthakumar.thiagarajan@oss.qualcomm.com Signed-off-by: Aditya Kumar Singh aditya.kumar.singh@oss.qualcomm.com Link: https://patch.msgid.link/20250917-fix_data_packet_rx_with_mlo_and_no_pubsta-... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/rx.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 8c0d91dfd7e2b..538c6eea645f2 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -5280,12 +5280,20 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, }
rx.sdata = prev_sta->sdata; + if (!status->link_valid && prev_sta->sta.mlo) { + struct link_sta_info *link_sta; + + link_sta = link_sta_info_get_bss(rx.sdata, + hdr->addr2); + if (!link_sta) + continue; + + link_id = link_sta->link_id; + } + if (!ieee80211_rx_data_set_sta(&rx, prev_sta, link_id)) goto out;
- if (!status->link_valid && prev_sta->sta.mlo) - continue; - ieee80211_prepare_and_rx_handle(&rx, skb, false);
prev_sta = sta; @@ -5293,10 +5301,18 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
if (prev_sta) { rx.sdata = prev_sta->sdata; - if (!ieee80211_rx_data_set_sta(&rx, prev_sta, link_id)) - goto out; + if (!status->link_valid && prev_sta->sta.mlo) { + struct link_sta_info *link_sta; + + link_sta = link_sta_info_get_bss(rx.sdata, + hdr->addr2); + if (!link_sta) + goto out;
- if (!status->link_valid && prev_sta->sta.mlo) + link_id = link_sta->link_id; + } + + if (!ieee80211_rx_data_set_sta(&rx, prev_sta, link_id)) goto out;
if (ieee80211_prepare_and_rx_handle(&rx, skb, true))