| Message ID | 20240520070045.631029-2-quic_ppranees@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: ath12k: fix issues in rx fragmentation path | expand |
On 5/20/2024 12:00 AM, P Praneesh wrote: > For fragmented packets, ath12k reassembles each fragment as a normal > packet and then reinjects it into HW ring. In this case, the DMA > direction should be DMA_TO_DEVICE, not DMA_FROM_DEVICE. Otherwise, > an invalid payload may be reinjected into the HW and > subsequently delivered to the host. > > Given that arbitrary memory can be allocated to the skb buffer, > knowledge about the data contained in the reinjected buffer is lacking. > Consequently, there’s a risk of private information being leaked. > > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00209-QCAHKSWPL_SILICONZ-1 > > Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") > Co-developed-by: Baochen Qiang <quic_bqiang@quicinc.com> > Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com> > Signed-off-by: P Praneesh <quic_ppranees@quicinc.com> Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
P Praneesh <quic_ppranees@quicinc.com> wrote: > For fragmented packets, ath12k reassembles each fragment as a normal > packet and then reinjects it into HW ring. In this case, the DMA > direction should be DMA_TO_DEVICE, not DMA_FROM_DEVICE. Otherwise, > an invalid payload may be reinjected into the HW and > subsequently delivered to the host. > > Given that arbitrary memory can be allocated to the skb buffer, > knowledge about the data contained in the reinjected buffer is lacking. > Consequently, there’s a risk of private information being leaked. > > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00209-QCAHKSWPL_SILICONZ-1 > > Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") > Co-developed-by: Baochen Qiang <quic_bqiang@quicinc.com> > Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com> > Signed-off-by: P Praneesh <quic_ppranees@quicinc.com> > Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com> > Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> 3 patches applied to ath-next branch of ath.git, thanks. 33322e3ef074 wifi: ath12k: change DMA direction while mapping reinjected packets 073f9f249eec wifi: ath12k: fix invalid memory access while processing fragmented packets a57ab7cced45 wifi: ath12k: fix firmware crash during reo reinject
diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c index 37205e894afe..2bfcc19d15ea 100644 --- a/drivers/net/wireless/ath/ath12k/dp_rx.c +++ b/drivers/net/wireless/ath/ath12k/dp_rx.c @@ -3004,7 +3004,7 @@ static int ath12k_dp_rx_h_defrag_reo_reinject(struct ath12k *ar, buf_paddr = dma_map_single(ab->dev, defrag_skb->data, defrag_skb->len + skb_tailroom(defrag_skb), - DMA_FROM_DEVICE); + DMA_TO_DEVICE); if (dma_mapping_error(ab->dev, buf_paddr)) return -ENOMEM; @@ -3090,7 +3090,7 @@ static int ath12k_dp_rx_h_defrag_reo_reinject(struct ath12k *ar, spin_unlock_bh(&dp->rx_desc_lock); err_unmap_dma: dma_unmap_single(ab->dev, buf_paddr, defrag_skb->len + skb_tailroom(defrag_skb), - DMA_FROM_DEVICE); + DMA_TO_DEVICE); return ret; }
For fragmented packets, ath12k reassembles each fragment as a normal packet and then reinjects it into HW ring. In this case, the DMA direction should be DMA_TO_DEVICE, not DMA_FROM_DEVICE. Otherwise, an invalid payload may be reinjected into the HW and subsequently delivered to the host. Given that arbitrary memory can be allocated to the skb buffer, knowledge about the data contained in the reinjected buffer is lacking. Consequently, there’s a risk of private information being leaked. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00209-QCAHKSWPL_SILICONZ-1 Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") Co-developed-by: Baochen Qiang <quic_bqiang@quicinc.com> Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com> Signed-off-by: P Praneesh <quic_ppranees@quicinc.com> --- drivers/net/wireless/ath/ath12k/dp_rx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)