From: Antonio Quartulli <[email protected]>
When receiving an IBSS_JOINED event select the BSS object
based on the {bssid, channel} couple rather than the bssid
only.
With the current approach if another cell having the same
BSSID (but using a different channel) exists then cfg80211
picks up the wrong BSS object.
The result is a mismatching channel configuration between
cfg80211 and the driver, that can lead to any sort of
problem.
The issue can be triggered by having an IBSS sitting on
given channel and then asking the driver to create a new
cell using the same BSSID but with a different frequency.
By passing the channel to cfg80211_get_bss() we can solve
this ambiguity and retrieve/create the correct BSS object.
All the users of cfg80211_ibss_joined() have been changed
accordingly.
Moreover WARN when cfg80211_ibss_joined() gets a NULL
channel as argument and remove a bogus call of the same
function in ath6kl (it does not make sense to call
cfg80211_ibss_joined() with a zero BSSID on ibss-leave).
Cc: Kalle Valo <[email protected]>
Cc: Arend van Spriel <[email protected]>
Cc: Bing Zhao <[email protected]>
Cc: Jussi Kivilinna <[email protected]>
Cc: [email protected]
Acked-by: Kalle Valo <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
---
Changes from v2:
- use WARN_ON instead of WARN
- fix tracing function
Changes from v1:
- WARN in cfg80211_ibss_joined() in case of NULL channel
- remove bogus cfg80211_ibss_joined() invocation in ath6kl
- squash patch: "cfg80211: use the proper union member when sending a
IBSS_JOINED event"
- add channel argument to tracing function
drivers/net/wireless/ath/ath6kl/cfg80211.c | 4 +---
.../net/wireless/brcm80211/brcmfmac/wl_cfg80211.c | 4 +++-
drivers/net/wireless/libertas/cfg.c | 3 ++-
drivers/net/wireless/mwifiex/cfg80211.c | 3 ++-
drivers/net/wireless/rndis_wlan.c | 4 +++-
include/net/cfg80211.h | 4 +++-
net/mac80211/ibss.c | 2 +-
net/wireless/core.h | 4 +++-
net/wireless/ibss.c | 17 ++++++++++------
net/wireless/trace.h | 23 +++++++++++++++++-----
net/wireless/util.c | 3 ++-
11 files changed, 49 insertions(+), 22 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index eba32f5..ab1e869 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -790,7 +790,7 @@ void ath6kl_cfg80211_connect_event(struct ath6kl_vif *vif, u16 channel,
if (nw_type & ADHOC_NETWORK) {
ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "ad-hoc %s selected\n",
nw_type & ADHOC_CREATOR ? "creator" : "joiner");
- cfg80211_ibss_joined(vif->ndev, bssid, GFP_KERNEL);
+ cfg80211_ibss_joined(vif->ndev, bssid, chan, GFP_KERNEL);
cfg80211_put_bss(ar->wiphy, bss);
return;
}
@@ -866,8 +866,6 @@ void ath6kl_cfg80211_disconnect_event(struct ath6kl_vif *vif, u8 reason,
"%s: ath6k not in ibss mode\n", __func__);
return;
}
- memset(bssid, 0, ETH_ALEN);
- cfg80211_ibss_joined(vif->ndev, bssid, GFP_KERNEL);
return;
}
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
index 711524e..cb2e3e2 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
@@ -4655,6 +4655,7 @@ brcmf_notify_connect_status(struct brcmf_if *ifp,
struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
struct net_device *ndev = ifp->ndev;
struct brcmf_cfg80211_profile *profile = &ifp->vif->profile;
+ struct ieee80211_channel *chan;
s32 err = 0;
if (ifp->vif->mode == WL_MODE_AP) {
@@ -4662,9 +4663,10 @@ brcmf_notify_connect_status(struct brcmf_if *ifp,
} else if (brcmf_is_linkup(e)) {
brcmf_dbg(CONN, "Linkup\n");
if (brcmf_is_ibssmode(ifp->vif)) {
+ chan = ieee80211_get_channel(cfg->wiphy, cfg->channel);
memcpy(profile->bssid, e->addr, ETH_ALEN);
wl_inform_ibss(cfg, ndev, e->addr);
- cfg80211_ibss_joined(ndev, e->addr, GFP_KERNEL);
+ cfg80211_ibss_joined(ndev, e->addr, chan, GFP_KERNEL);
clear_bit(BRCMF_VIF_STATUS_CONNECTING,
&ifp->vif->sme_state);
set_bit(BRCMF_VIF_STATUS_CONNECTED,
diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c
index 32f7500..2d72a6b 100644
--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -1766,7 +1766,8 @@ static void lbs_join_post(struct lbs_private *priv,
memcpy(priv->wdev->ssid, params->ssid, params->ssid_len);
priv->wdev->ssid_len = params->ssid_len;
- cfg80211_ibss_joined(priv->dev, bssid, GFP_KERNEL);
+ cfg80211_ibss_joined(priv->dev, bssid, params->chandef.chan,
+ GFP_KERNEL);
/* TODO: consider doing this at MACREG_INT_CODE_LINK_SENSED time */
priv->connect_status = LBS_CONNECTED;
diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 648e2ff..e10a99b 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1872,7 +1872,8 @@ mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
params->privacy);
done:
if (!ret) {
- cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid, GFP_KERNEL);
+ cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid,
+ params->chandef.chan, GFP_KERNEL);
dev_dbg(priv->adapter->dev,
"info: joined/created adhoc network with bssid"
" %pM successfully\n", priv->cfg_bssid);
diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c
index c3cdda1..dd2bae8 100644
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -2836,7 +2836,9 @@ static void rndis_wlan_do_link_up_work(struct usbnet *usbdev)
bssid, req_ie, req_ie_len,
resp_ie, resp_ie_len, GFP_KERNEL);
} else if (priv->infra_mode == NDIS_80211_INFRA_ADHOC)
- cfg80211_ibss_joined(usbdev->net, bssid, GFP_KERNEL);
+ cfg80211_ibss_joined(usbdev->net, bssid,
+ get_current_channel(usbdev, NULL),
+ GFP_KERNEL);
kfree(info);
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 459700e..c23f6a4 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -3895,6 +3895,7 @@ void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
*
* @dev: network device
* @bssid: the BSSID of the IBSS joined
+ * @channel: the channel of the IBSS joined
* @gfp: allocation flags
*
* This function notifies cfg80211 that the device joined an IBSS or
@@ -3904,7 +3905,8 @@ void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
* with the locally generated beacon -- this guarantees that there is
* always a scan result for this IBSS. cfg80211 will handle the rest.
*/
-void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp);
+void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+ struct ieee80211_channel *channel, gfp_t gfp);
/**
* cfg80211_notify_new_candidate - notify cfg80211 of a new mesh peer candidate
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index ed7eec3..d5821ee 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -386,7 +386,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
presp->head_len, 0, GFP_KERNEL);
cfg80211_put_bss(local->hw.wiphy, bss);
netif_carrier_on(sdata->dev);
- cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL);
+ cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL);
}
static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 37ec16d..8a820f9 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -210,6 +210,7 @@ struct cfg80211_event {
} dc;
struct {
u8 bssid[ETH_ALEN];
+ struct ieee80211_channel *channel;
} ij;
};
};
@@ -257,7 +258,8 @@ int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool nowext);
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool nowext);
-void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
+void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+ struct ieee80211_channel *channel);
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev);
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index f911c5f..e37e39c 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -14,7 +14,8 @@
#include "rdev-ops.h"
-void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
+void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+ struct ieee80211_channel *channel)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_bss *bss;
@@ -28,8 +29,7 @@ void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
if (!wdev->ssid_len)
return;
- bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
- wdev->ssid, wdev->ssid_len,
+ bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
if (WARN_ON(!bss))
@@ -54,21 +54,26 @@ void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
#endif
}
-void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
+void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
+ struct ieee80211_channel *channel, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_event *ev;
unsigned long flags;
- trace_cfg80211_ibss_joined(dev, bssid);
+ trace_cfg80211_ibss_joined(dev, bssid, channel);
+
+ if (WARN_ON(!channel))
+ return;
ev = kzalloc(sizeof(*ev), gfp);
if (!ev)
return;
ev->type = EVENT_IBSS_JOINED;
- memcpy(ev->cr.bssid, bssid, ETH_ALEN);
+ memcpy(ev->ij.bssid, bssid, ETH_ALEN);
+ ev->ij.channel = channel;
spin_lock_irqsave(&wdev->event_lock, flags);
list_add_tail(&ev->list, &wdev->event_list);
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index fbcc23e..5eaeed5 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -2278,11 +2278,6 @@ DECLARE_EVENT_CLASS(cfg80211_rx_evt,
TP_printk(NETDEV_PR_FMT ", " MAC_PR_FMT, NETDEV_PR_ARG, MAC_PR_ARG(addr))
);
-DEFINE_EVENT(cfg80211_rx_evt, cfg80211_ibss_joined,
- TP_PROTO(struct net_device *netdev, const u8 *addr),
- TP_ARGS(netdev, addr)
-);
-
DEFINE_EVENT(cfg80211_rx_evt, cfg80211_rx_spurious_frame,
TP_PROTO(struct net_device *netdev, const u8 *addr),
TP_ARGS(netdev, addr)
@@ -2293,6 +2288,24 @@ DEFINE_EVENT(cfg80211_rx_evt, cfg80211_rx_unexpected_4addr_frame,
TP_ARGS(netdev, addr)
);
+TRACE_EVENT(cfg80211_ibss_joined,
+ TP_PROTO(struct net_device *netdev, const u8 *bssid,
+ struct ieee80211_channel *channel),
+ TP_ARGS(netdev, bssid, channel),
+ TP_STRUCT__entry(
+ NETDEV_ENTRY
+ MAC_ENTRY(bssid)
+ CHAN_ENTRY
+ ),
+ TP_fast_assign(
+ NETDEV_ASSIGN;
+ MAC_ASSIGN(bssid, bssid);
+ CHAN_ASSIGN(channel);
+ ),
+ TP_printk(NETDEV_PR_FMT ", bssid: " MAC_PR_FMT ", " CHAN_PR_FMT,
+ NETDEV_PR_ARG, MAC_PR_ARG(bssid), CHAN_PR_ARG)
+);
+
TRACE_EVENT(cfg80211_probe_status,
TP_PROTO(struct net_device *netdev, const u8 *addr, u64 cookie,
bool acked),
diff --git a/net/wireless/util.c b/net/wireless/util.c
index d39c371..7526a4d 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -820,7 +820,8 @@ void cfg80211_process_wdev_events(struct wireless_dev *wdev)
ev->dc.reason, true);
break;
case EVENT_IBSS_JOINED:
- __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
+ __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
+ ev->ij.channel);
break;
}
wdev_unlock(wdev);
--
1.8.5.3
On Wed, 2014-01-29 at 17:53 +0100, Antonio Quartulli wrote:
> From: Antonio Quartulli <[email protected]>
>
> When receiving an IBSS_JOINED event select the BSS object
> based on the {bssid, channel} couple rather than the bssid
> only.
> With the current approach if another cell having the same
> BSSID (but using a different channel) exists then cfg80211
> picks up the wrong BSS object.
> The result is a mismatching channel configuration between
> cfg80211 and the driver, that can lead to any sort of
> problem.
>
> The issue can be triggered by having an IBSS sitting on
> given channel and then asking the driver to create a new
> cell using the same BSSID but with a different frequency.
> By passing the channel to cfg80211_get_bss() we can solve
> this ambiguity and retrieve/create the correct BSS object.
> All the users of cfg80211_ibss_joined() have been changed
> accordingly.
>
> Moreover WARN when cfg80211_ibss_joined() gets a NULL
> channel as argument and remove a bogus call of the same
> function in ath6kl (it does not make sense to call
> cfg80211_ibss_joined() with a zero BSSID on ibss-leave).
Applied, with a small code cleanup in ath6kl.
johannes