diff options
| author | Benjamin Berg <benjamin.berg@intel.com> | 2023-06-08 16:36:02 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2023-06-09 13:30:32 +0200 |
| commit | 15846f95ab01b71fdb1cef8df73680aad41edf70 (patch) | |
| tree | dde4c327b289c5747419f3d476c4e8ed07a96034 | |
| parent | 1ff56684fa8682bdfbbce4e12cf67ab23cb1db05 (diff) | |
wifi: mac80211: take lock before setting vif links
ieee80211_vif_set_links requires the sdata->local->mtx lock to be held.
Add the appropriate locking around the calls in both the link add and
remove handlers.
This causes a warning when e.g. ieee80211_link_release_channel is called
via ieee80211_link_stop from ieee80211_vif_update_links.
Fixes: 0d8c4a3c8688 ("wifi: mac80211: implement add/del interface link callbacks")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230608163202.fa0c6597fdad.I83dd70359f6cda30f86df8418d929c2064cf4995@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | net/mac80211/cfg.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 86b2036d73ff..f2d08dbccfb7 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -4865,11 +4865,16 @@ static int ieee80211_add_intf_link(struct wiphy *wiphy, unsigned int link_id) { struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); + int res; if (wdev->use_4addr) return -EOPNOTSUPP; - return ieee80211_vif_set_links(sdata, wdev->valid_links); + mutex_lock(&sdata->local->mtx); + res = ieee80211_vif_set_links(sdata, wdev->valid_links); + mutex_unlock(&sdata->local->mtx); + + return res; } static void ieee80211_del_intf_link(struct wiphy *wiphy, @@ -4878,7 +4883,9 @@ static void ieee80211_del_intf_link(struct wiphy *wiphy, { struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); + mutex_lock(&sdata->local->mtx); ieee80211_vif_set_links(sdata, wdev->valid_links); + mutex_unlock(&sdata->local->mtx); } static int sta_add_link_station(struct ieee80211_local *local, |