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-rw-r--r--package/mac80211/patches/561-ath9k_antenna_mask_validate.patch28
1 files changed, 28 insertions, 0 deletions
diff --git a/package/mac80211/patches/561-ath9k_antenna_mask_validate.patch b/package/mac80211/patches/561-ath9k_antenna_mask_validate.patch
new file mode 100644
index 0000000000..c84162fe44
--- /dev/null
+++ b/package/mac80211/patches/561-ath9k_antenna_mask_validate.patch
@@ -0,0 +1,28 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -1929,12 +1929,24 @@ static u32 fill_chainmask(u32 cap, u32 n
+ return filled;
+ }
+
++static bool validate_antenna_mask(u32 val)
++{
++ switch (val & 0x7) {
++ case 0x1:
++ case 0x3:
++ case 0x7:
++ return true;
++ default:
++ return false;
++ }
++}
++
+ static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
+ {
+ struct ath_softc *sc = hw->priv;
+ struct ath_hw *ah = sc->sc_ah;
+
+- if (!rx_ant || !tx_ant)
++ if (!validate_antenna_mask(rx_ant) || !validate_antenna_mask(tx_ant))
+ return -EINVAL;
+
+ sc->ant_rx = rx_ant;