diff options
| author | Janusz Dziedzic <janusz.dziedzic@gmail.com> | 2021-10-24 23:15:46 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2021-10-25 16:23:20 +0300 |
| commit | 689a0a9f505f7bffdefe6f17fddb41c8ab6344f6 (patch) | |
| tree | cdd143266a82c8c7cf3ca1b38c8cf65b071e2cb5 /net/wireless/util.c | |
| parent | 09b1d5dc6ce1c9151777f6c4e128a59457704c97 (diff) | |
| download | linux-689a0a9f505f7bffdefe6f17fddb41c8ab6344f6.tar.xz | |
cfg80211: correct bridge/4addr mode check
Without the patch we fail:
$ sudo brctl addbr br0
$ sudo brctl addif br0 wlp1s0
$ sudo iw wlp1s0 set 4addr on
command failed: Device or resource busy (-16)
Last command failed but iface was already in 4addr mode.
Fixes: ad4bb6f8883a ("cfg80211: disallow bridging managed/adhoc interfaces")
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@gmail.com>
Link: https://lore.kernel.org/r/20211024201546.614379-1-janusz.dziedzic@gmail.com
[add fixes tag, fix indentation, edit commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/util.c')
| -rw-r--r-- | net/wireless/util.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c index 18dba3d7c638..a1a99a574984 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1028,14 +1028,14 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev, !(rdev->wiphy.interface_modes & (1 << ntype))) return -EOPNOTSUPP; - /* if it's part of a bridge, reject changing type to station/ibss */ - if (netif_is_bridge_port(dev) && - (ntype == NL80211_IFTYPE_ADHOC || - ntype == NL80211_IFTYPE_STATION || - ntype == NL80211_IFTYPE_P2P_CLIENT)) - return -EBUSY; - if (ntype != otype) { + /* if it's part of a bridge, reject changing type to station/ibss */ + if (netif_is_bridge_port(dev) && + (ntype == NL80211_IFTYPE_ADHOC || + ntype == NL80211_IFTYPE_STATION || + ntype == NL80211_IFTYPE_P2P_CLIENT)) + return -EBUSY; + dev->ieee80211_ptr->use_4addr = false; dev->ieee80211_ptr->mesh_id_up_len = 0; wdev_lock(dev->ieee80211_ptr); |