Re: [dpdk-dev] [PATCH] net/mlx5: fix crash when releasing the meter table

[Suanming Mou <suanmingm@mellanox.com>]

Hi Tonghao,

Good catch.
Add maintainers.

Thanks,
SuanmingMou

> -----Original Message-----
> From: xiangxia.m.yue@gmail.com <xiangxia.m.yue@gmail.com>
> Sent: Wednesday, April 15, 2020 4:52 PM
> To: Suanming Mou <suanmingm@mellanox.com>;
> david.marchand@redhat.com
> Cc: dev@dpdk.org; Tonghao Zhang <xiangxia.m.yue@gmail.com>;
> stable@dpdk.org
> Subject: [PATCH] net/mlx5: fix crash when releasing the meter table
> 
> From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
> 
> The meters of ports share the same meter table on the port. When releasing
> meters, don't check value returned using assert. Because other meters may
> reference to it.
> 
> Fixes: 46a5e6bc6a85 ("net/mlx5: prepare meter flow tables")
> Fixes: 708aa5608f98 ("net/mlx5: fix meter suffix table leak")
> 
> Cc: stable@dpdk.org
> 
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Reviewed-off-by: Suanming Mou <suanmingm@mellanox.com>
> ---
>  drivers/net/mlx5/mlx5_flow_dv.c | 18 ++++++------------
>  1 file changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_flow_dv.c
> b/drivers/net/mlx5/mlx5_flow_dv.c index ae00ca431eec..2174b9aa37dc
> 100644
> --- a/drivers/net/mlx5/mlx5_flow_dv.c
> +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> @@ -8552,11 +8552,9 @@ struct field_modify_info modify_tcp[] = {
>  		claim_zero(mlx5_glue->dv_destroy_flow_matcher
>  			  (mtd->egress.any_matcher));
>  	if (mtd->egress.tbl)
> -		claim_zero(flow_dv_tbl_resource_release(dev,
> -							mtd->egress.tbl));
> +		flow_dv_tbl_resource_release(dev, mtd->egress.tbl);
>  	if (mtd->egress.sfx_tbl)
> -		claim_zero(flow_dv_tbl_resource_release(dev,
> -							mtd->egress.sfx_tbl));
> +		flow_dv_tbl_resource_release(dev, mtd->egress.sfx_tbl);
>  	if (mtd->ingress.color_matcher)
>  		claim_zero(mlx5_glue->dv_destroy_flow_matcher
>  			  (mtd->ingress.color_matcher));
> @@ -8564,11 +8562,9 @@ struct field_modify_info modify_tcp[] = {
>  		claim_zero(mlx5_glue->dv_destroy_flow_matcher
>  			  (mtd->ingress.any_matcher));
>  	if (mtd->ingress.tbl)
> -		claim_zero(flow_dv_tbl_resource_release(dev,
> -							mtd->ingress.tbl));
> +		flow_dv_tbl_resource_release(dev, mtd->ingress.tbl);
>  	if (mtd->ingress.sfx_tbl)
> -		claim_zero(flow_dv_tbl_resource_release(dev,
> -							mtd->ingress.sfx_tbl));
> +		flow_dv_tbl_resource_release(dev, mtd->ingress.sfx_tbl);
>  	if (mtd->transfer.color_matcher)
>  		claim_zero(mlx5_glue->dv_destroy_flow_matcher
>  			  (mtd->transfer.color_matcher));
> @@ -8576,11 +8572,9 @@ struct field_modify_info modify_tcp[] = {
>  		claim_zero(mlx5_glue->dv_destroy_flow_matcher
>  			  (mtd->transfer.any_matcher));
>  	if (mtd->transfer.tbl)
> -		claim_zero(flow_dv_tbl_resource_release(dev,
> -							mtd->transfer.tbl));
> +		flow_dv_tbl_resource_release(dev, mtd->transfer.tbl);
>  	if (mtd->transfer.sfx_tbl)
> -		claim_zero(flow_dv_tbl_resource_release(dev,
> -							mtd->transfer.sfx_tbl));
> +		flow_dv_tbl_resource_release(dev, mtd->transfer.sfx_tbl);
>  	if (mtd->drop_actn)
>  		claim_zero(mlx5_glue->destroy_flow_action(mtd->drop_actn));
>  	rte_free(mtd);
> --
> 1.8.3.1