4.19-stable review patch. If anyone has any objections, please let me know.
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From: Felix Fietkau nbd@nbd.name
commit 393b6bc174b0dd21bb2a36c13b36e62fc3474a23 upstream.
Avoid potentially crashing in the driver because of uninitialized private data
Fixes: 5b3dc42b1b0d ("mac80211: add support for driver tx power reporting") Cc: stable@vger.kernel.org Signed-off-by: Felix Fietkau nbd@nbd.name Link: https://patch.msgid.link/20241002095630.22431-1-nbd@nbd.name Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/mac80211/cfg.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2443,7 +2443,8 @@ static int ieee80211_get_tx_power(struct struct ieee80211_local *local = wiphy_priv(wiphy); struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
- if (local->ops->get_txpower) + if (local->ops->get_txpower && + (sdata->flags & IEEE80211_SDATA_IN_DRIVER)) return drv_get_txpower(local, sdata, dbm);
if (!local->use_chanctx)