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wifi: mac80211: fix potential sta-link leak

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When a station is allocated, links are added but not
set to valid yet (e.g. during connection to an AP MLD),
we might remove the station without ever marking links
valid, and leak them. Fix that.

Fixes: cb71f1d136 ("wifi: mac80211: add sta link addition/removal")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240111181514.6573998beaf8.I09ac2e1d41c80f82a5a616b8bd1d9d8dd709a6a6@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2024-01-11 18:17:44 +02:00
parent 26490da5a7
commit b01a74b3ca
1 changed files with 4 additions and 1 deletions
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5
net/mac80211/sta_info.c
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@ -404,7 +404,10 @@ void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
int i;
for (i = 0; i < ARRAY_SIZE(sta->link); i++) {
if (!(sta->sta.valid_links & BIT(i)))
struct link_sta_info *link_sta;
link_sta = rcu_access_pointer(sta->link[i]);
if (!link_sta)
continue;
sta_remove_link(sta, i, false);