[V3,1/1] net/mlx5: fix IPv6 next proto validation
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Commit Message
Previous patch added validation of the IPv6 next proto field, in order
to overcome a known limitation.
One of the values checked is IPPROTO_HOPOPTS, which is defined as 0.
If proto field is not specified for matching, or mask=0, as in the
following, a wrong validation takes place.
flow create 0 ingress pattern eth / ipv6 has_frag_ext is 0 / end actions
drop / end
Fix the validation only on proto asked by the user.
Fixes: 92be60e1b541 ("net/mlx5: enforce limitation on IPv6 next proto")
Signed-off-by: Eli Britstein <elibr@nvidia.com>
Acked-by: Dekel Peled <dekelp@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
---
drivers/net/mlx5/mlx5_flow.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Comments
Hi,
> -----Original Message-----
> From: Eli Britstein <elibr@nvidia.com>
> Sent: Thursday, October 22, 2020 11:26 AM
> To: dev@dpdk.org
> Cc: Dekel Peled <dekelp@nvidia.com>; Ori Kam <orika@nvidia.com>; Matan
> Azrad <matan@nvidia.com>; Raslan Darawsheh <rasland@nvidia.com>; Slava
> Ovsiienko <viacheslavo@nvidia.com>; Shahaf Shuler <shahafs@nvidia.com>;
> Asaf Penso <asafp@nvidia.com>; Eli Britstein <elibr@nvidia.com>
> Subject: [PATCH V3 1/1] net/mlx5: fix IPv6 next proto validation
>
> Previous patch added validation of the IPv6 next proto field, in order
> to overcome a known limitation.
> One of the values checked is IPPROTO_HOPOPTS, which is defined as 0.
> If proto field is not specified for matching, or mask=0, as in the
> following, a wrong validation takes place.
> flow create 0 ingress pattern eth / ipv6 has_frag_ext is 0 / end actions
> drop / end
> Fix the validation only on proto asked by the user.
>
> Fixes: 92be60e1b541 ("net/mlx5: enforce limitation on IPv6 next proto")
>
> Signed-off-by: Eli Britstein <elibr@nvidia.com>
> Acked-by: Dekel Peled <dekelp@nvidia.com>
> Acked-by: Matan Azrad <matan@nvidia.com>
> ---
> drivers/net/mlx5/mlx5_flow.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
> index 22fb4ee60a..d7243a878b 100644
> --- a/drivers/net/mlx5/mlx5_flow.c
> +++ b/drivers/net/mlx5/mlx5_flow.c
> @@ -1979,8 +1979,8 @@ mlx5_flow_validate_item_ipv6(const struct
> rte_flow_item *item,
> RTE_FLOW_ERROR_TYPE_ITEM,
> item,
> "IPv6 cannot follow L2/VLAN layer "
> "which ether type is not IPv6");
> - if (mask && spec)
> - next_proto = mask->hdr.proto & spec->hdr.proto;
> + if (mask && mask->hdr.proto == UINT8_MAX && spec)
> + next_proto = spec->hdr.proto;
> if (item_flags & MLX5_FLOW_LAYER_IPV6_ENCAP) {
> if (next_proto == IPPROTO_IPIP || next_proto ==
> IPPROTO_IPV6)
> return rte_flow_error_set(error, EINVAL,
> --
> 2.28.0.546.g385c171
Patch applied to next-net-mlx,
Kindest regards,
Raslan Darawsheh
On 10/22/2020 11:01 AM, Raslan Darawsheh wrote:
> Hi,
>
>> -----Original Message-----
>> From: Eli Britstein <elibr@nvidia.com>
>> Sent: Thursday, October 22, 2020 11:26 AM
>> To: dev@dpdk.org
>> Cc: Dekel Peled <dekelp@nvidia.com>; Ori Kam <orika@nvidia.com>; Matan
>> Azrad <matan@nvidia.com>; Raslan Darawsheh <rasland@nvidia.com>; Slava
>> Ovsiienko <viacheslavo@nvidia.com>; Shahaf Shuler <shahafs@nvidia.com>;
>> Asaf Penso <asafp@nvidia.com>; Eli Britstein <elibr@nvidia.com>
>> Subject: [PATCH V3 1/1] net/mlx5: fix IPv6 next proto validation
>>
>> Previous patch added validation of the IPv6 next proto field, in order
>> to overcome a known limitation.
>> One of the values checked is IPPROTO_HOPOPTS, which is defined as 0.
>> If proto field is not specified for matching, or mask=0, as in the
>> following, a wrong validation takes place.
>> flow create 0 ingress pattern eth / ipv6 has_frag_ext is 0 / end actions
>> drop / end
>> Fix the validation only on proto asked by the user.
>>
>> Fixes: 92be60e1b541 ("net/mlx5: enforce limitation on IPv6 next proto")
>>
>> Signed-off-by: Eli Britstein <elibr@nvidia.com>
>> Acked-by: Dekel Peled <dekelp@nvidia.com>
>> Acked-by: Matan Azrad <matan@nvidia.com>
>
>
> Patch applied to next-net-mlx,
>
Squashed into relevant commit in next-net, thanks.
@@ -1979,8 +1979,8 @@ mlx5_flow_validate_item_ipv6(const struct rte_flow_item *item,
RTE_FLOW_ERROR_TYPE_ITEM, item,
"IPv6 cannot follow L2/VLAN layer "
"which ether type is not IPv6");
- if (mask && spec)
- next_proto = mask->hdr.proto & spec->hdr.proto;
+ if (mask && mask->hdr.proto == UINT8_MAX && spec)
+ next_proto = spec->hdr.proto;
if (item_flags & MLX5_FLOW_LAYER_IPV6_ENCAP) {
if (next_proto == IPPROTO_IPIP || next_proto == IPPROTO_IPV6)
return rte_flow_error_set(error, EINVAL,