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| author | Felix Fietkau <nbd@nbd.name> | 2021-03-23 22:47:37 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2021-04-12 23:07:24 +0200 |
| commit | b4403cee6400c5f679e9c4a82b91d61aa961eccf (patch) | |
| tree | ae283c2ac5dedbe6b425dce756c38af8a999f85b /drivers/net/wireless/mediatek/mt76/dma.c | |
| parent | 4da64fe086d95daa66d0def40fbd1b02d4f813fd (diff) | |
| download | linux-stable-b4403cee6400c5f679e9c4a82b91d61aa961eccf.tar.gz linux-stable-b4403cee6400c5f679e9c4a82b91d61aa961eccf.tar.bz2 linux-stable-b4403cee6400c5f679e9c4a82b91d61aa961eccf.zip | |
mt76: fix potential DMA mapping leak
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@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/dma.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index b87b46538b95..6ea58aecca41 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -318,7 +318,7 @@ 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) |