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mwifiex: fix wrong return values in add_virtual_intf() error cases 

add_virtual_intf() needs to return an ERR_PTR(), instead of NULL,
on errors, otherwise cfg80211 will crash.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bing Zhao 2012-06-15 15:49:54 -07:00 committed by John W. Linville
parent 7f59ebb5f3
commit 858faa57dd
1 changed files with 11 additions and 14 deletions
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25
drivers/net/wireless/mwifiex/cfg80211.c
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@ -1484,7 +1484,7 @@ struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
struct wireless_dev *wdev;
if (!adapter)
return NULL;
return ERR_PTR(-EFAULT);
switch (type) {
case NL80211_IFTYPE_UNSPECIFIED:
@ -1494,12 +1494,12 @@ struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
if (priv->bss_mode) {
wiphy_err(wiphy,
"cannot create multiple sta/adhoc ifaces\n");
return NULL;
return ERR_PTR(-EINVAL);
}
wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
if (!wdev)
return NULL;
return ERR_PTR(-ENOMEM);
wdev->wiphy = wiphy;
priv->wdev = wdev;
@ -1522,12 +1522,12 @@ struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
if (priv->bss_mode) {
wiphy_err(wiphy, "Can't create multiple AP interfaces");
return NULL;
return ERR_PTR(-EINVAL);
}
wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
if (!wdev)
return NULL;
return ERR_PTR(-ENOMEM);
priv->wdev = wdev;
wdev->wiphy = wiphy;
@ -1544,14 +1544,15 @@ struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
break;
default:
wiphy_err(wiphy, "type not supported\n");
return NULL;
return ERR_PTR(-EINVAL);
}
dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), name,
ether_setup, 1);
if (!dev) {
wiphy_err(wiphy, "no memory available for netdevice\n");
goto error;
priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
return ERR_PTR(-ENOMEM);
}
mwifiex_init_priv_params(priv, dev);
@ -1582,7 +1583,9 @@ struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
/* Register network device */
if (register_netdevice(dev)) {
wiphy_err(wiphy, "cannot register virtual network device\n");
goto error;
free_netdev(dev);
priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
return ERR_PTR(-EFAULT);
}
sema_init(&priv->async_sem, 1);
@ -1594,12 +1597,6 @@ struct net_device *mwifiex_add_virtual_intf(struct wiphy *wiphy,
mwifiex_dev_debugfs_init(priv);
#endif
return dev;
error:
if (dev && (dev->reg_state == NETREG_UNREGISTERED))
free_netdev(dev);
priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
return NULL;
}
EXPORT_SYMBOL_GPL(mwifiex_add_virtual_intf);