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| author | Jouni Malinen <jouni.malinen@atheros.com> | 2009-03-20 21:21:17 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-03-27 20:13:04 -0400 |
| commit | 255e737eab645ec6037baeca04a5e0a7c3b1f459 (patch) | |
| tree | d178103256dcd352addf7e646b89e128e7be1cf9 /net/wireless | |
| parent | 65fc73ac4a310945dfeceac961726c2765ad2ec0 (diff) | |
| download | linux-255e737eab645ec6037baeca04a5e0a7c3b1f459.tar.gz linux-255e737eab645ec6037baeca04a5e0a7c3b1f459.tar.bz2 linux-255e737eab645ec6037baeca04a5e0a7c3b1f459.zip | |
nl80211: Add more through validation of MLME command parameters
Check that the used authentication type and reason code are valid here
so that drivers/mac80211 do not need to care about this. In addition,
remove the unnecessary validation of SSID attribute length which is
taken care of by netlink policy.
Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/nl80211.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 44c79972be57..6f38ee7a3c92 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2614,6 +2614,14 @@ static int nl80211_dump_scan(struct sk_buff *skb, return err; } +static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type) +{ + return auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM || + auth_type == NL80211_AUTHTYPE_SHARED_KEY || + auth_type == NL80211_AUTHTYPE_FT || + auth_type == NL80211_AUTHTYPE_NETWORK_EAP; +} + static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *drv; @@ -2666,6 +2674,10 @@ static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info) if (info->attrs[NL80211_ATTR_AUTH_TYPE]) { req.auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]); + if (!nl80211_valid_auth_type(req.auth_type)) { + err = -EINVAL; + goto out; + } } err = drv->ops->auth(&drv->wiphy, dev, &req); @@ -2718,10 +2730,6 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info) } } - if (nla_len(info->attrs[NL80211_ATTR_SSID]) > IEEE80211_MAX_SSID_LEN) { - err = -EINVAL; - goto out; - } req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); @@ -2769,9 +2777,15 @@ static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info) req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); - if (info->attrs[NL80211_ATTR_REASON_CODE]) + if (info->attrs[NL80211_ATTR_REASON_CODE]) { req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); + if (req.reason_code == 0) { + /* Reason Code 0 is reserved */ + err = -EINVAL; + goto out; + } + } if (info->attrs[NL80211_ATTR_IE]) { req.ie = nla_data(info->attrs[NL80211_ATTR_IE]); @@ -2817,9 +2831,15 @@ static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info) req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); - if (info->attrs[NL80211_ATTR_REASON_CODE]) + if (info->attrs[NL80211_ATTR_REASON_CODE]) { req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); + if (req.reason_code == 0) { + /* Reason Code 0 is reserved */ + err = -EINVAL; + goto out; + } + } if (info->attrs[NL80211_ATTR_IE]) { req.ie = nla_data(info->attrs[NL80211_ATTR_IE]); |