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wireless: check for dangling wdev->current_bss pointer 

If it *is* still set when the netdev is being deleted,
then we are about to leak a pointer.  Warn and clean up
in that case.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ben Greear 2013-06-19 14:06:26 -07:00 committed by Johannes Berg
parent 0e3a39b562
commit f9bef3df52
1 changed files with 6 additions and 0 deletions
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6
net/wireless/core.c
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@ -934,6 +934,12 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
* freed.
*/
cfg80211_process_wdev_events(wdev);
if (WARN_ON(wdev->current_bss)) {
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
wdev->current_bss = NULL;
}
break;
case NETDEV_PRE_UP:
if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))