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Commit 1ff79dfa authored by Johannes Berg's avatar Johannes Berg
Browse files

nl80211: check channel switch validity better 



Before allowing userspace to initiate a channel switch, check
that it's actually connected in some sense. Also use a more
appropriate error code for the not connected case.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent c782bf8c

net/wireless/nl80211.c

+6 −1
Original line number Diff line number Diff line
@@ -5771,10 +5771,15 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info) 


		/* useless if AP is not running */

		if (!wdev->beacon_interval)

			return -EINVAL;

			return -ENOTCONN;

		break;

	case NL80211_IFTYPE_ADHOC:

		if (!wdev->ssid_len)

			return -ENOTCONN;

		break;

	case NL80211_IFTYPE_MESH_POINT:

		if (!wdev->mesh_id_len)

			return -ENOTCONN;

		break;

	default:

		return -EOPNOTSUPP;