4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Felix Fietkau <nbd@xxxxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Link: https://patch.msgid.link/20241002095630.22431-1-nbd@xxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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)
