This is a note to let you know that I've just added the patch titled mt76: fix potential DMA mapping leak to the 5.11-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: mt76-fix-potential-dma-mapping-leak.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From b4403cee6400c5f679e9c4a82b91d61aa961eccf Mon Sep 17 00:00:00 2001 From: Felix Fietkau <nbd@xxxxxxxx> Date: Tue, 23 Mar 2021 22:47:37 +0100 Subject: mt76: fix potential DMA mapping leak From: Felix Fietkau <nbd@xxxxxxxx> commit b4403cee6400c5f679e9c4a82b91d61aa961eccf upstream. With buf uninitialized in mt76_dma_tx_queue_skb_raw, its field skip_unmap could potentially inherit a non-zero value from stack garbage. If this happens, it will cause DMA mappings for MCU command frames to not be unmapped after completion Fixes: 27d5c528a7ca ("mt76: fix double DMA unmap of the first buffer on 7615/7915") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Felix Fietkau <nbd@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/wireless/mediatek/mt76/dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -309,7 +309,7 @@ static int mt76_dma_tx_queue_skb_raw(struct mt76_dev *dev, struct mt76_queue *q, struct sk_buff *skb, u32 tx_info) { - struct mt76_queue_buf buf; + struct mt76_queue_buf buf = {}; dma_addr_t addr; if (q->queued + 1 >= q->ndesc - 1) Patches currently in stable-queue which might be from nbd@xxxxxxxx are queue-5.11/mt76-fix-potential-dma-mapping-leak.patch queue-5.11/mt76-mt7615-use-ieee80211_free_txskb-in-mt7615_tx_token_put.patch