[PATCH] event/dlb2: fix QID inflight exploit

[Jerin Jacob]

On Mon, Jun 6, 2022 at 9:33 PM Timothy McDaniel
<timothy.mcdaniel at intel.com> wrote:
>
> If QID inflights is set to an invalid value it can cause the
> PMD to hang.  This commit adds checks to make sure that the
> value is valid before programming the hardware.
>
> Fixes: 1857f1922ce2 ("event/dlb2: use new implementation of resource file")
> Cc: stable at dpdk.org
>
> Signed-off-by: Timothy McDaniel <timothy.mcdaniel at intel.com>

Applied to dpdk-next-net-eventdev/for-main. Thanks


> ---
>  drivers/event/dlb2/pf/base/dlb2_resource.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/event/dlb2/pf/base/dlb2_resource.c b/drivers/event/dlb2/pf/base/dlb2_resource.c
> index d4c49c2992..548bebd068 100644
> --- a/drivers/event/dlb2/pf/base/dlb2_resource.c
> +++ b/drivers/event/dlb2/pf/base/dlb2_resource.c
> @@ -3701,7 +3701,7 @@ dlb2_verify_create_ldb_queue_args(struct dlb2_hw *hw,
>                 }
>         }
>
> -       if (args->num_qid_inflights > 4096) {
> +       if (args->num_qid_inflights < 1 || args->num_qid_inflights > 2048) {
>                 resp->status = DLB2_ST_INVALID_QID_INFLIGHT_ALLOCATION;
>                 return -EINVAL;
>         }
> --
> 2.25.1
>