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Code Issues Releases Wiki Activity

cfg80211: fix wiphy_register error path

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If rfkill_register() fails in wiphy_register() the struct device
is unregistered but everything else isn't (regulatory, debugfs)
and we even leave the wiphy instance on all internal lists even
though it will likely be freed soon, which is clearly a problem.
Fix this by cleaning up properly.

Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2013-05-10 19:23:40 +02:00
parent 61f1598278
commit 03cd7e4e1e
1 changed files with 10 additions and 6 deletions
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16
net/wireless/core.c
View file

@ -638,17 +638,21 @@ int wiphy_register(struct wiphy *wiphy)
* cfg80211_mutex lock
*/
res = rfkill_register(rdev->rfkill);
if (res)
goto out_rm_dev;
if (res) {
device_del(&rdev->wiphy.dev);
mutex_lock(&cfg80211_mutex);
debugfs_remove_recursive(rdev->wiphy.debugfsdir);
list_del_rcu(&rdev->list);
wiphy_regulatory_deregister(wiphy);
mutex_unlock(&cfg80211_mutex);
return res;
}
rtnl_lock();
rdev->wiphy.registered = true;
rtnl_unlock();
return 0;
out_rm_dev:
device_del(&rdev->wiphy.dev);
return res;
}
EXPORT_SYMBOL(wiphy_register);