From e548f749b096133d6da3dd7235ecfc6bd67be306 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 26 Nov 2019 15:09:39 +0300
Subject: [PATCH] mac80211: airtime: Fix an off by one in ieee80211_calc_rx_airtime()
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Git-commit: e548f749b096133d6da3dd7235ecfc6bd67be306
Patch-mainline: v5.5-rc3
References: jsc#SLE-13430
This code was copied from mt76 and inherited an off by one bug from
there. The > should be >= so that we don't read one element beyond
the end of the array.
Fixes: db3e1c40cf2f ("mac80211: Import airtime calculation code from mt76")
Reported-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20191126120910.ftr4t7me3by32aiz@kili.mountain
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/mac80211/airtime.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mac80211/airtime.c b/net/mac80211/airtime.c
index 63cb0028b02d..9fc2968856c0 100644
--- a/net/mac80211/airtime.c
+++ b/net/mac80211/airtime.c
@@ -442,7 +442,7 @@ u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
return 0;
sband = hw->wiphy->bands[status->band];
- if (!sband || status->rate_idx > sband->n_bitrates)
+ if (!sband || status->rate_idx >= sband->n_bitrates)
return 0;
rate = &sband->bitrates[status->rate_idx];
--
2.16.4