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wifi: mac80211: more station handling sanity checks

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Add more sanity checks to the API handling, we shouldn't
be able to create a station without links, nor should we
be able to add a link to a station that wasn't created as
an MLD with links in the first place.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-07-18 23:01:19 +02:00
parent 0ad49045f2
commit 956b961337
1 changed files with 7 additions and 0 deletions
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7
net/mac80211/cfg.c
View file

@ -4649,6 +4649,9 @@ static int sta_add_link_station(struct ieee80211_local *local,
if (!sta)
return -ENOENT;
if (!sta->sta.valid_links)
return -EINVAL;
if (sta->sta.valid_links & BIT(params->link_id))
return -EALREADY;
@ -4724,6 +4727,10 @@ static int sta_del_link_station(struct ieee80211_sub_if_data *sdata,
if (!(sta->sta.valid_links & BIT(params->link_id)))
return -EINVAL;
/* must not create a STA without links */
if (sta->sta.valid_links == BIT(params->link_id))
return -EINVAL;
ieee80211_sta_remove_link(sta, params->link_id);
return 0;