From: Stefan Bühler <redacted>

If wdev->wext.keys was initialized it didn't get reset to NULL on
unregister (and it doesn't get set in cfg80211_init_wdev either), but
wdev is reused if unregister was triggered through
cfg80211_switch_netns.

The next unregister (for whatever reason) will try to free
wdev->wext.keys again.

Signed-off-by: Stefan Bühler <redacted>
---
 net/wireless/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/wireless/core.c b/net/wireless/core.c
index 350513744575..3e25229a059d 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c

@@ -1102,6 +1102,7 @@ static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync)
 
 #ifdef CONFIG_CFG80211_WEXT
 	kzfree(wdev->wext.keys);
+	wdev->wext.keys = NULL;
 #endif
 	/* only initialized if we have a netdev */
 	if (wdev->netdev)

-- 
2.24.0