[PATCH] hostapd: revert upstream commit to fix #13156

[stijn at linux-ipv6.be]

Commit e978072baaca ("Do prune_association only after the STA is
authorized") causes issues when an STA roams from one interface to
another interface on the same PHY. The mt7915 driver is not able to
handle this properly. While the commits fixes a DoS, there are other
devices and drivers with the same limitation, so revert to the orginal
behavior for now, until we have a better solution in place.

Fixes: #13156
Signed-off-by: Stijn Tintel <stijn at linux-ipv6.be>
---
 .../patches/991-Fix-OpenWrt-13156.patch       | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 package/network/services/hostapd/patches/991-Fix-OpenWrt-13156.patch

diff --git a/package/network/services/hostapd/patches/991-Fix-OpenWrt-13156.patch b/package/network/services/hostapd/patches/991-Fix-OpenWrt-13156.patch
new file mode 100644
index 0000000000..671b8ffecd
--- /dev/null
+++ b/package/network/services/hostapd/patches/991-Fix-OpenWrt-13156.patch
@@ -0,0 +1,63 @@
+From 26cd9bafc1d25e602952ee86cd2a5b8c3a995490 Mon Sep 17 00:00:00 2001
+From: Stijn Tintel <stijn at linux-ipv6.be>
+Date: Fri, 28 Jul 2023 16:27:47 +0300
+Subject: [PATCH] Revert "Do prune_association only after the STA is
+ authorized"
+
+Commit e978072baaca ("Do prune_association only after the STA is
+authorized") causes issues when an STA roams from one interface to
+another interface on the same PHY. The mt7915 driver is not able to
+handle this properly. While the commits fixes a DoS, there are other
+devices and drivers with the same limitation, so revert to the orginal
+behavior for now, until we have a better solution in place.
+
+Ref: https://github.com/openwrt/openwrt/issues/13156
+Signed-off-by: Stijn Tintel <stijn at linux-ipv6.be>
+---
+ src/ap/hostapd.c  | 14 +++++++++++---
+ src/ap/sta_info.c |  3 ---
+ 2 files changed, 11 insertions(+), 6 deletions(-)
+
+--- a/src/ap/hostapd.c
++++ b/src/ap/hostapd.c
+@@ -3619,6 +3619,8 @@ int hostapd_remove_iface(struct hapd_int
+ void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
+ 			   int reassoc)
+ {
++	int mld_assoc_link_id = -1;
++
+ 	if (hapd->tkip_countermeasures) {
+ 		hostapd_drv_sta_deauth(hapd, sta->addr,
+ 				       WLAN_REASON_MICHAEL_MIC_FAILURE);
+@@ -3626,10 +3628,16 @@ void hostapd_new_assoc_sta(struct hostap
+ 	}
+ 
+ #ifdef CONFIG_IEEE80211BE
+-	if (hapd->conf->mld_ap && sta->mld_info.mld_sta &&
+-	    sta->mld_assoc_link_id != hapd->mld_link_id)
+-		return;
++	if (hapd->conf->mld_ap && sta->mld_info.mld_sta) {
++		if (sta->mld_assoc_link_id == hapd->mld_link_id) {
++			mld_assoc_link_id = sta->mld_assoc_link_id;
++		} else {
++			return;
++		}
++	}
+ #endif /* CONFIG_IEEE80211BE */
++        if (mld_assoc_link_id != -2)
++		hostapd_prune_associations(hapd, sta->addr, mld_assoc_link_id);
+ 
+ 	ap_sta_clear_disconnect_timeouts(hapd, sta);
+ 	sta->post_csa_sa_query = 0;
+--- a/src/ap/sta_info.c
++++ b/src/ap/sta_info.c
+@@ -1318,9 +1318,6 @@ void ap_sta_set_authorized(struct hostap
+ 				mld_assoc_link_id = -2;
+ 		}
+ #endif /* CONFIG_IEEE80211BE */
+-		if (mld_assoc_link_id != -2)
+-			hostapd_prune_associations(hapd, sta->addr,
+-						   mld_assoc_link_id);
+ 		sta->flags |= WLAN_STA_AUTHORIZED;
+ 	} else {
+ 		sta->flags &= ~WLAN_STA_AUTHORIZED;
-- 
2.41.0