This is a note to let you know that I've just added the patch titled
wifi: mac80211: make rate u32 in sta_set_rate_info_rx()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-mac80211-make-rate-u32-in-sta_set_rate_info_rx.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7dfde2775b4b037514e94d246f293a41d757507d
Author: Shayne Chen <shayne.chen@xxxxxxxxxxxx>
Date: Thu Feb 9 19:06:59 2023 +0800
wifi: mac80211: make rate u32 in sta_set_rate_info_rx()
[ Upstream commit 59336e07b287d91dc4ec265e07724e8f7e3d0209 ]
The value of last_rate in ieee80211_sta_rx_stats is degraded from u32 to
u16 after being assigned to rate variable, which causes information loss
in STA_STATS_FIELD_TYPE and later bitfields.
Signed-off-by: Shayne Chen <shayne.chen@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230209110659.25447-1-shayne.chen@xxxxxxxxxxxx
Fixes: 41cbb0f5a295 ("mac80211: add support for HE")
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 7b2e8c890381a..4d6890250337d 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -2121,7 +2121,7 @@ static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
{
- u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
+ u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
if (rate == STA_STATS_RATE_INVALID)
return -EINVAL;
