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Couple of fixes:

Browse Source 
* fix aggregation on mesh
  * fix late enabling of 4-addr mode
  * leave monitor SKBs with some headroom
  * limit band information for old applications
  * fix virt-wifi WARN_ON
  * fix memory leak in cfg80211 BSS list maintenance
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Merge tag 'mac80211-for-net-2021-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Couple of fixes:
 * fix aggregation on mesh
 * fix late enabling of 4-addr mode
 * leave monitor SKBs with some headroom
 * limit band information for old applications
 * fix virt-wifi WARN_ON
 * fix memory leak in cfg80211 BSS list maintenance
This commit is contained in:
David S. Miller 2021-07-23 17:57:09 +01:00
commit 1f22cf1349
8 changed files with 95 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/net/wireless/virt_wifi.c
View File

@ -136,6 +136,29 @@ static struct ieee80211_supported_band band_5ghz = {
/* Assigned at module init. Guaranteed locally-administered and unicast. */
static u8 fake_router_bssid[ETH_ALEN] __ro_after_init = {};
static void virt_wifi_inform_bss(struct wiphy *wiphy)
{
u64 tsf = div_u64(ktime_get_boottime_ns(), 1000);
struct cfg80211_bss *informed_bss;
static const struct {
u8 tag;
u8 len;
u8 ssid[8];
} __packed ssid = {
.tag = WLAN_EID_SSID,
.len = 8,
.ssid = "VirtWifi",
};
informed_bss = cfg80211_inform_bss(wiphy, &channel_5ghz,
CFG80211_BSS_FTYPE_PRESP,
fake_router_bssid, tsf,
WLAN_CAPABILITY_ESS, 0,
(void *)&ssid, sizeof(ssid),
DBM_TO_MBM(-50), GFP_KERNEL);
cfg80211_put_bss(wiphy, informed_bss);
}
/* Called with the rtnl lock held. */
static int virt_wifi_scan(struct wiphy *wiphy,
struct cfg80211_scan_request *request)
@ -156,28 +179,13 @@ static int virt_wifi_scan(struct wiphy *wiphy,
/* Acquires and releases the rdev BSS lock. */
static void virt_wifi_scan_result(struct work_struct *work)
{
struct {
u8 tag;
u8 len;
u8 ssid[8];
} __packed ssid = {
.tag = WLAN_EID_SSID, .len = 8, .ssid = "VirtWifi",
};
struct cfg80211_bss *informed_bss;
struct virt_wifi_wiphy_priv *priv =
container_of(work, struct virt_wifi_wiphy_priv,
scan_result.work);
struct wiphy *wiphy = priv_to_wiphy(priv);
struct cfg80211_scan_info scan_info = { .aborted = false };
u64 tsf = div_u64(ktime_get_boottime_ns(), 1000);
informed_bss = cfg80211_inform_bss(wiphy, &channel_5ghz,
CFG80211_BSS_FTYPE_PRESP,
fake_router_bssid, tsf,
WLAN_CAPABILITY_ESS, 0,
(void *)&ssid, sizeof(ssid),
DBM_TO_MBM(-50), GFP_KERNEL);
cfg80211_put_bss(wiphy, informed_bss);
virt_wifi_inform_bss(wiphy);
/* Schedules work which acquires and releases the rtnl lock. */
cfg80211_scan_done(priv->scan_request, &scan_info);
@ -225,10 +233,12 @@ static int virt_wifi_connect(struct wiphy *wiphy, struct net_device *netdev,
if (!could_schedule)
return -EBUSY;
if (sme->bssid)
if (sme->bssid) {
ether_addr_copy(priv->connect_requested_bss, sme->bssid);
else
} else {
virt_wifi_inform_bss(wiphy);
eth_zero_addr(priv->connect_requested_bss);
}
wiphy_debug(wiphy, "connect\n");
@ -241,11 +251,13 @@ static void virt_wifi_connect_complete(struct work_struct *work)
struct virt_wifi_netdev_priv *priv =
container_of(work, struct virt_wifi_netdev_priv, connect.work);
u8 *requested_bss = priv->connect_requested_bss;
bool has_addr = !is_zero_ether_addr(requested_bss);
bool right_addr = ether_addr_equal(requested_bss, fake_router_bssid);
u16 status = WLAN_STATUS_SUCCESS;
if (!priv->is_up || (has_addr && !right_addr))
if (is_zero_ether_addr(requested_bss))
requested_bss = NULL;
if (!priv->is_up || (requested_bss && !right_addr))
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
else
priv->is_connected = true;

19
net/mac80211/cfg.c
View File

@ -152,6 +152,8 @@ static int ieee80211_change_iface(struct wiphy *wiphy,
struct vif_params *params)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
int ret;
ret = ieee80211_if_change_type(sdata, type);
@ -162,7 +164,24 @@ static int ieee80211_change_iface(struct wiphy *wiphy,
RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
ieee80211_check_fast_rx_iface(sdata);
} else if (type == NL80211_IFTYPE_STATION && params->use_4addr >= 0) {
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
if (params->use_4addr == ifmgd->use_4addr)
return 0;
sdata->u.mgd.use_4addr = params->use_4addr;
if (!ifmgd->associated)
return 0;
mutex_lock(&local->sta_mtx);
sta = sta_info_get(sdata, ifmgd->bssid);
if (sta)
drv_sta_set_4addr(local, sdata, &sta->sta,
params->use_4addr);
mutex_unlock(&local->sta_mtx);
if (params->use_4addr)
ieee80211_send_4addr_nullfunc(local, sdata);
}
if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {

2
net/mac80211/ieee80211_i.h
View File

@ -2201,6 +2201,8 @@ void ieee80211_dynamic_ps_timer(struct timer_list *t);
void ieee80211_send_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
bool powersave);
void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata);
void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
struct ieee80211_hdr *hdr, bool ack, u16 tx_time);

4
net/mac80211/mlme.c
View File

@ -1095,8 +1095,8 @@ void ieee80211_send_nullfunc(struct ieee80211_local *local,
ieee80211_tx_skb(sdata, skb);
}
static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata)
void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata)
{
struct sk_buff *skb;
struct ieee80211_hdr *nullfunc;

3
net/mac80211/rx.c
View File

@ -730,7 +730,8 @@ ieee80211_make_monitor_skb(struct ieee80211_local *local,
* Need to make a copy and possibly remove radiotap header
* and FCS from the original.
*/
skb = skb_copy_expand(*origskb, needed_headroom, 0, GFP_ATOMIC);
skb = skb_copy_expand(*origskb, needed_headroom + NET_SKB_PAD,
0, GFP_ATOMIC);
if (!skb)
return NULL;

57
net/mac80211/tx.c
View File

@ -1147,6 +1147,29 @@ static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
return queued;
}
static void
ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct sk_buff *skb)
{
struct rate_control_ref *ref = sdata->local->rate_ctrl;
u16 tid;
if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
return;
if (!sta || !sta->sta.ht_cap.ht_supported ||
!sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
skb->protocol == sdata->control_port_protocol)
return;
tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
if (likely(sta->ampdu_mlme.tid_tx[tid]))
return;
ieee80211_start_tx_ba_session(&sta->sta, tid, 0);
}
/*
* initialises @tx
* pass %NULL for the station if unknown, a valid pointer if known
@ -1160,6 +1183,7 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
struct ieee80211_local *local = sdata->local;
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
bool aggr_check = false;
int tid;
memset(tx, 0, sizeof(*tx));
@ -1188,8 +1212,10 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
} else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
tx->sta = sta_info_get_bss(sdata, hdr->addr1);
}
if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) {
tx->sta = sta_info_get(sdata, hdr->addr1);
aggr_check = true;
}
}
if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
@ -1199,8 +1225,12 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
struct tid_ampdu_tx *tid_tx;
tid = ieee80211_get_tid(hdr);
tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
if (!tid_tx && aggr_check) {
ieee80211_aggr_check(sdata, tx->sta, skb);
tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
}
if (tid_tx) {
bool queued;
@ -4120,29 +4150,6 @@ void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
}
EXPORT_SYMBOL(ieee80211_txq_schedule_start);
static void
ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct sk_buff *skb)
{
struct rate_control_ref *ref = sdata->local->rate_ctrl;
u16 tid;
if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
return;
if (!sta || !sta->sta.ht_cap.ht_supported ||
!sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
skb->protocol == sdata->control_port_protocol)
return;
tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
if (likely(sta->ampdu_mlme.tid_tx[tid]))
return;
ieee80211_start_tx_ba_session(&sta->sta, tid, 0);
}
void __ieee80211_subif_start_xmit(struct sk_buff *skb,
struct net_device *dev,
u32 info_flags,

5
net/wireless/nl80211.c
View File

@ -2351,7 +2351,10 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
goto nla_put_failure;
for (band = state->band_start;
band < NUM_NL80211_BANDS; band++) {
band < (state->split ?
NUM_NL80211_BANDS :
NL80211_BAND_60GHZ + 1);
band++) {
struct ieee80211_supported_band *sband;
/* omit higher bands for ancient software */

6
net/wireless/scan.c
View File

@ -1754,16 +1754,14 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev,
* be grouped with this beacon for updates ...
*/
if (!cfg80211_combine_bsses(rdev, new)) {
kfree(new);
bss_ref_put(rdev, new);
goto drop;
}
}
if (rdev->bss_entries >= bss_entries_limit &&
!cfg80211_bss_expire_oldest(rdev)) {
if (!list_empty(&new->hidden_list))
list_del(&new->hidden_list);
kfree(new);
bss_ref_put(rdev, new);
goto drop;
}