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cfg80211: hold BSS over association process 

This fixes the potential issue that the BSS struct that we use
and later assign to wdev->current_bss is removed from the scan
list while associating.

Also warn when we don't have a BSS struct in connect_result
unless it's from a driver that only has the connect() API.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2013-06-19 13:21:15 +02:00
parent 959867fa55
commit f1940c5730
2 changed files with 14 additions and 5 deletions
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4
net/wireless/mlme.c
View File

@ -38,6 +38,7 @@ void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss,
* frame instead of reassoc.
*/
if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) {
cfg80211_unhold_bss(bss_from_pub(bss));
cfg80211_put_bss(wiphy, bss);
return;
}
@ -142,6 +143,7 @@ void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss)
nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL);
cfg80211_sme_assoc_timeout(wdev);
cfg80211_unhold_bss(bss_from_pub(bss));
cfg80211_put_bss(wiphy, bss);
}
EXPORT_SYMBOL(cfg80211_assoc_timeout);
@ -309,6 +311,8 @@ int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
goto out;
err = rdev_assoc(rdev, dev, req);
if (!err)
cfg80211_hold_bss(bss_from_pub(req->bss));
out:
if (err)

15
net/wireless/sme.c
View File

@ -615,19 +615,24 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
kfree(wdev->connect_keys);
wdev->connect_keys = NULL;
wdev->ssid_len = 0;
cfg80211_put_bss(wdev->wiphy, bss);
if (bss) {
cfg80211_unhold_bss(bss_from_pub(bss));
cfg80211_put_bss(wdev->wiphy, bss);
}
return;
}
if (!bss)
if (!bss) {
WARN_ON_ONCE(!wiphy_to_dev(wdev->wiphy)->ops->connect);
bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
wdev->ssid, wdev->ssid_len,
WLAN_CAPABILITY_ESS,
WLAN_CAPABILITY_ESS);
if (WARN_ON(!bss))
return;
if (WARN_ON(!bss))
return;
cfg80211_hold_bss(bss_from_pub(bss));
}
cfg80211_hold_bss(bss_from_pub(bss));
wdev->current_bss = bss_from_pub(bss);
cfg80211_upload_connect_keys(wdev);