> Subject: [PATCH] RDMA/mana_ib: Prevent array underflow in
> mana_ib_create_qp_raw()
>
> The "port" comes from the user and if it is zero then the:
>
> ndev = mc->ports[port - 1];
>
> assignment does an out of bounds read. I have changed the if statement to fix
> this and to mirror how it is done in mana_ib_create_qp_rss().
>
> Fixes: 0266a177631d ("RDMA/mana_ib: Add a driver for Microsoft Azure
> Network Adapter")
> Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
Thank you.
Acked-by: Long Li <longli@xxxxxxxxxxxxx>
> ---
> drivers/infiniband/hw/mana/qp.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/hw/mana/qp.c b/drivers/infiniband/hw/mana/qp.c
> index ea15ec77e321..54b61930a7fd 100644
> --- a/drivers/infiniband/hw/mana/qp.c
> +++ b/drivers/infiniband/hw/mana/qp.c
> @@ -289,7 +289,7 @@ static int mana_ib_create_qp_raw(struct ib_qp *ibqp,
> struct ib_pd *ibpd,
>
> /* IB ports start with 1, MANA Ethernet ports start with 0 */
> port = ucmd.port;
> - if (ucmd.port > mc->num_ports)
> + if (port < 1 || port > mc->num_ports)
> return -EINVAL;
>
> if (attr->cap.max_send_wr > MAX_SEND_BUFFERS_PER_QUEUE) {
> --
> 2.35.1
