On 4/1/2024 11:26 AM, Aleksandr Aprelkov wrote:
> If num_rx_queues or num_tx_queues is 0, then division by zero occurs
> on j calculation.
> Also goto mark "err_get_rx_queue" used for tx queues too.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
>
> Fixes: 8d818c105501 ("crypto: caam/qi2 - add DPAA2-CAAM driver")
> Signed-off-by: Aleksandr Aprelkov <aaprelkov@xxxxxxxxxxxx>
> ---
> drivers/crypto/caam/caamalg_qi2.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/crypto/caam/caamalg_qi2.c b/drivers/crypto/caam/caamalg_qi2.c
> index a4f6884416a0..07cb1aad758f 100644
> --- a/drivers/crypto/caam/caamalg_qi2.c
> +++ b/drivers/crypto/caam/caamalg_qi2.c
> @@ -5049,6 +5049,11 @@ static int __cold dpaa2_dpseci_setup(struct fsl_mc_device *ls_dev)
>
> priv->num_pairs = min(priv->dpseci_attr.num_rx_queues,
> priv->dpseci_attr.num_tx_queues);
> + if (!priv->num_pairs) {
> + err = -EINVAL;
> + dev_err(dev, "one of queues number is 0\n");
> + goto err_get_queues;
> + }
dpseci objects are created in MC f/w using restool: https://github.com/nxp-qoriq/restool
restool validates the user-provided attributes of these objects,
including num_{rx,tx}_queues - which can't be zero, they must be at least 1.
More details in source code:
https://github.com/nxp-qoriq/restool/blob/master/dpseci_commands.c#L713
https://github.com/nxp-qoriq/restool/blob/master/dpseci_commands.c#L633
So thanks, but I don't think this check is required.
Horia
