From: Pontus Fuchs Date: Tue, 12 Jun 2012 12:13:19 +0000 (+0200) Subject: mac80211: Disallow changing chan type on monitor when CHAN_MODE_FIXED X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ac4d82fa01c194dba10b9a7c35449ba36eb642fc;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git mac80211: Disallow changing chan type on monitor when CHAN_MODE_FIXED If you add a monitor interface in parallel to a normal interface mac80211 will let you to change the channel type on the monitor interface even if you are connected. Add an explicit check to disallow this. Signed-off-by: Pontus Fuchs [fix typo in commit log, use sdata instead of netdev] Signed-off-by: Johannes Berg --- diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 9a974579ba8..cd8b1fb05d4 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -689,7 +689,8 @@ static int ieee80211_set_channel(struct wiphy *wiphy, case CHAN_MODE_HOPPING: return -EBUSY; case CHAN_MODE_FIXED: - if (local->oper_channel != chan) + if (local->oper_channel != chan || + (!sdata && local->_oper_channel_type != channel_type)) return -EBUSY; if (!sdata && local->_oper_channel_type == channel_type) return 0;