On 04/03/2019 10:27, xiangxia.m....@gmail.com wrote:
> From: Tonghao Zhang <xiangxia.m....@gmail.com>
>
> If we try to set VFs mac address on a VF (not PF) net device,
> the kernel will be crash. The commands are show as below:
>
> $ echo 2 > /sys/class/net/$MLX_PF0/device/sriov_numvfs
> $ ip link set $MLX_VF0 vf 0 mac 00:11:22:33:44:00
>
> [exception RIP: mlx5_eswitch_set_vport_mac+41]
> [ffffb8b7079e3688] do_setlink at ffffffff8f67f85b
> [ffffb8b7079e37a8] __rtnl_newlink at ffffffff8f683778
> [ffffb8b7079e3b68] rtnl_newlink at ffffffff8f683a63
> [ffffb8b7079e3b90] rtnetlink_rcv_msg at ffffffff8f67d812
> [ffffb8b7079e3c10] netlink_rcv_skb at ffffffff8f6b88ab
> [ffffb8b7079e3c60] netlink_unicast at ffffffff8f6b808f
> [ffffb8b7079e3ca0] netlink_sendmsg at ffffffff8f6b8412
> [ffffb8b7079e3d18] sock_sendmsg at ffffffff8f6452f6
> [ffffb8b7079e3d30] ___sys_sendmsg at ffffffff8f645860
> [ffffb8b7079e3eb0] __sys_sendmsg at ffffffff8f647a38
> [ffffb8b7079e3f38] do_syscall_64 at ffffffff8f00401b
> [ffffb8b7079e3f50] entry_SYSCALL_64_after_hwframe at ffffffff8f80008c
>
> and
>
> [exception RIP: mlx5_eswitch_get_vport_config+12]
> [ffffa70607e57678] mlx5e_get_vf_config at ffffffffc03c7f8f [mlx5_core]
> [ffffa70607e57688] do_setlink at ffffffffbc67fa59
> [ffffa70607e577a8] __rtnl_newlink at ffffffffbc683778
> [ffffa70607e57b68] rtnl_newlink at ffffffffbc683a63
> [ffffa70607e57b90] rtnetlink_rcv_msg at ffffffffbc67d812
> [ffffa70607e57c10] netlink_rcv_skb at ffffffffbc6b88ab
> [ffffa70607e57c60] netlink_unicast at ffffffffbc6b808f
> [ffffa70607e57ca0] netlink_sendmsg at ffffffffbc6b8412
> [ffffa70607e57d18] sock_sendmsg at ffffffffbc6452f6
> [ffffa70607e57d30] ___sys_sendmsg at ffffffffbc645860
> [ffffa70607e57eb0] __sys_sendmsg at ffffffffbc647a38
> [ffffa70607e57f38] do_syscall_64 at ffffffffbc00401b
> [ffffa70607e57f50] entry_SYSCALL_64_after_hwframe at ffffffffbc80008c
>
> Fixes: a8d70a054a718 ("net/mlx5: E-Switch, Disallow vlan/spoofcheck setup if
> not being esw manager")
> Cc: Eli Cohen <e...@mellanox.com>
> Signed-off-by: Tonghao Zhang <xiangxia.m....@gmail.com>
> ---
> v1->v2: check only the esw is null, instead of ESW_ALLOWED.
> ---
> drivers/net/ethernet/mellanox/mlx5/core/eswitch.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> index 6cb9710..385e5cc 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> @@ -1871,7 +1871,7 @@ int mlx5_eswitch_set_vport_mac(struct mlx5_eswitch *esw,
> u64 node_guid;
> int err = 0;
>
> - if (!MLX5_CAP_GEN(esw->dev, vport_group_manager))
> + if (!esw || !MLX5_CAP_GEN(esw->dev, vport_group_manager))
> return -EPERM;
> if (!LEGAL_VPORT(esw, vport) || is_multicast_ether_addr(mac))
> return -EINVAL;
> @@ -1945,7 +1945,7 @@ int mlx5_eswitch_get_vport_config(struct mlx5_eswitch
> *esw,
> {
> struct mlx5_vport *evport;
>
> - if (!MLX5_CAP_GEN(esw->dev, vport_group_manager))
> + if (!esw || !MLX5_CAP_GEN(esw->dev, vport_group_manager))
> return -EPERM;
> if (!LEGAL_VPORT(esw, vport))
> return -EINVAL;
>
Reviewed-by: Roi Dayan <r...@mellanox.com>
