From 30fe6d50eb088783c8729c7d930f65296b2b3fa7 Mon Sep 17 00:00:00 2001 From: Masashi Honma Date: Tue, 25 Sep 2018 11:15:00 +0900 Subject: nl80211: Fix possible Spectre-v1 for NL80211_TXRATE_HT Use array_index_nospec() to sanitize ridx with respect to speculation. Signed-off-by: Masashi Honma Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/wireless') diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 4b8ec659e797..bd26230de63e 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3756,6 +3756,7 @@ static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband, return false; /* check availability */ + ridx = array_index_nospec(ridx, IEEE80211_HT_MCS_MASK_LEN); if (sband->ht_cap.mcs.rx_mask[ridx] & rbit) mcs[ridx] |= rbit; else -- cgit v1.2.3