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@xxxxxxxxxxx>
---
net/wireless/nl80211.c | 32 ++++++++++++++++++++++++++------
1 file changed, 26 insertions(+), 6 deletions(-)
--- uml.orig/net/wireless/nl80211.c 2009-03-20 18:03:53.000000000 +0200
+++ uml/net/wireless/nl80211.c 2009-03-20 18:03:57.000000000 +0200
@@ -2614,6 +2614,14 @@ static int nl80211_dump_scan(struct sk_b
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 s
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_b
}
}
- 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
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 s
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]);
--
--
Jouni Malinen PGP id EFC895FA
--
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