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authorBing Zhao <bzhao@marvell.com>2012-06-15 15:49:54 -0700
committerJohn W. Linville <linville@tuxdriver.com>2012-06-19 14:59:19 -0400
commit858faa57dd9e2b91f3f870fbb1185982e42f5a2b (patch)
tree145bd3842a6d1af9b2e7ac2b6c90185443811778 /drivers/net
parent7f59ebb5f34380696d16094fa1090485ec077fb1 (diff)
downloadop-kernel-dev-858faa57dd9e2b91f3f870fbb1185982e42f5a2b.zip
op-kernel-dev-858faa57dd9e2b91f3f870fbb1185982e42f5a2b.tar.gz
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/mwifiex/cfg80211.c25
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 015fec3..ce61b6f 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -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);
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