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 <pontus.fuchs@gmail.com>
[fix typo in commit log, use sdata instead of netdev]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9a97457..cd8b1fb 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -689,7 +689,8 @@
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;