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@xxxxxxxxxxx>
> Signed-off-by: Baochen Qiang <quic_bqiang@xxxxxxxxxxx>
> Signed-off-by: P Praneesh <quic_ppranees@xxxxxxxxxxx>
Acked-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx>
