mac80211_hwsim: fix module init error paths for netlink

There is no unregister netlink notifier and family on error paths
in init_mac80211_hwsim(). Also there is an error path where
hwsim_class is not destroyed.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Fixes: 62759361eb49 ("mac80211-hwsim: Provide multicast event for HWSIM_CMD_NEW_RADIO")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index aa8058264d5b5bd6d6d112eeaaf999acde15d263..07f958c633345aaa6925a9cd36ba4b96a79077b5 100644 (file)
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -3703,16 +3703,16 @@ static int __init init_mac80211_hwsim(void)
        if (err)
                goto out_unregister_pernet;
 
+       err = hwsim_init_netlink();
+       if (err)
+               goto out_unregister_driver;
+
        hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
        if (IS_ERR(hwsim_class)) {
                err = PTR_ERR(hwsim_class);
-               goto out_unregister_driver;
+               goto out_exit_netlink;
        }
 
-       err = hwsim_init_netlink();
-       if (err < 0)
-               goto out_unregister_driver;
-
        for (i = 0; i < radios; i++) {
                struct hwsim_new_radio_params param = { 0 };
 
@@ -3818,6 +3818,8 @@ out_free_mon:
        free_netdev(hwsim_mon);
 out_free_radios:
        mac80211_hwsim_free();
+out_exit_netlink:
+       hwsim_exit_netlink();
 out_unregister_driver:
        platform_driver_unregister(&mac80211_hwsim_driver);
 out_unregister_pernet: