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authorJohannes Berg <johannes.berg@intel.com>2013-06-19 13:21:15 +0200
committerJohannes Berg <johannes.berg@intel.com>2013-06-19 18:55:39 +0200
commitf1940c5730f0f0555e42afbcf629be7f7fbbce8e (patch)
tree0e85c3b6f57bbb8e9f2640c28d0e98e0bdf55765 /net/wireless
parent959867fa55d0cb55fb3d08656e5e62607167617f (diff)
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>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/mlme.c4
-rw-r--r--net/wireless/sme.c15
2 files changed, 14 insertions, 5 deletions
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index dd6f79d7bd2e..bfac5e186f57 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -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)
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index ae7e2cbf45cb..c0bf781d4fbe 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -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);

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