The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 906d2d3f874a54183df5a609fda180adf0462428 Mon Sep 17 00:00:00 2001

From: Felix Fietkau nbd@nbd.name Date: Fri, 25 Jan 2019 17:59:06 +0100 Subject: [PATCH] mt76: fix corrupted software generated tx CCMP PN

Since ccmp_pn is u8 *, the second half needs to start at array index 4 instead of 0. Fixes a connection stall after a certain amount of traffic

Fixes: 23405236460b9 ("mt76: fix transmission of encrypted management frames") Cc: stable@vger.kernel.org Signed-off-by: Felix Fietkau nbd@nbd.name

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c index bf39624c9b98..eab713723b7e 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c @@ -314,7 +314,7 @@ void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi, ccmp_pn[6] = pn >> 32; ccmp_pn[7] = pn >> 40; txwi->iv = *((__le32 *)&ccmp_pn[0]); - txwi->eiv = *((__le32 *)&ccmp_pn[1]); + txwi->eiv = *((__le32 *)&ccmp_pn[4]); }

spin_lock_bh(&dev->mt76.lock);