From 92ffe055c3ea45856183bebed62f8880f75fef3b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 16 Sep 2008 20:39:36 +0200 Subject: [PATCH] cfg80211: reject invalid configuration items Reject configuring mesh-id for non-mesh, monitor flags for non-monitor. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/wireless/nl80211.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index a745932d1370..572793c8c7ab 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -418,7 +418,7 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) int err, ifindex; enum nl80211_iftype type; struct net_device *dev; - u32 flags; + u32 _flags, *flags = NULL; memset(¶ms, 0, sizeof(params)); @@ -442,18 +442,28 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) goto unlock; } - if (type == NL80211_IFTYPE_MESH_POINT && - info->attrs[NL80211_ATTR_MESH_ID]) { + if (info->attrs[NL80211_ATTR_MESH_ID]) { + if (type != NL80211_IFTYPE_MESH_POINT) { + err = -EINVAL; + goto unlock; + } params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]); params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); } + if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) { + if (type != NL80211_IFTYPE_MONITOR) { + err = -EINVAL; + goto unlock; + } + err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS], + &_flags); + if (!err) + flags = &_flags; + } rtnl_lock(); - err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ? - info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL, - &flags); err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex, - type, err ? NULL : &flags, ¶ms); + type, flags, ¶ms); dev = __dev_get_by_index(&init_net, ifindex); WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != type)); -- 2.20.1