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Commit f1940c57 authored by Johannes Berg's avatar Johannes Berg
Browse files

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: default avatarJohannes Berg <johannes.berg@intel.com>
parent 959867fa

net/wireless/mlme.c

+4 −0
Original line number Diff line number Diff line
@@ -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)

net/wireless/sme.c

+10 −5
Original line number Diff line number Diff line
@@ -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;

		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;



		cfg80211_hold_bss(bss_from_pub(bss));

	}



	wdev->current_bss = bss_from_pub(bss);



	cfg80211_upload_connect_keys(wdev);