git.openwrt.org Git - openwrt/openwrt.git/blob

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 2 Oct 2024 11:45:35 +0200
   3 Subject: [PATCH] wifi: mac80211: do not pass a stopped vif to the driver in
   4  .get_txpower
   5
   6 Avoid potentially crashing in the driver because of uninitialized private data
   7
   8 Fixes: 5b3dc42b1b0d ("mac80211: add support for driver tx power reporting")
   9 Cc: stable@vger.kernel.org
  10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  11 ---
  12
  13 --- a/net/mac80211/cfg.c
  14 +++ b/net/mac80211/cfg.c
  15 @@ -3134,7 +3134,8 @@ static int ieee80211_get_tx_power(struct
  16         struct ieee80211_local *local = wiphy_priv(wiphy);
  17         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
  18
  19 -       if (local->ops->get_txpower)
  20 +       if (local->ops->get_txpower &&
  21 +           (sdata->flags & IEEE80211_SDATA_IN_DRIVER))
  22                 return drv_get_txpower(local, sdata, dbm);
  23
  24         if (local->emulate_chanctx)