Re: [PATCH rdma-rc 2/9] IB/mlx4: Check gid_index return value

[Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>]

FWIW
Reviewed-by: Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>

On Sat, Nov 05, 2016 at 09:57:15PM +0200, Leon Romanovsky wrote:
> From: Daniel Jurgens <danielj-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> 
> Check the returned gid index value and return an error if it is invalid.
> 
> Fixes: 5070cd2239bd('IB/mlx4: Replace mechanism for RoCE GID management')
> Signed-off-by: Daniel Jurgens <danielj-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> Signed-off-by: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Signed-off-by: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> ---
>  drivers/infiniband/hw/mlx4/ah.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/hw/mlx4/ah.c b/drivers/infiniband/hw/mlx4/ah.c
> index 6be7dc3..8dfc76f 100644
> --- a/drivers/infiniband/hw/mlx4/ah.c
> +++ b/drivers/infiniband/hw/mlx4/ah.c
> @@ -102,7 +102,10 @@ static struct ib_ah *create_iboe_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr
>  	if (vlan_tag < 0x1000)
>  		vlan_tag |= (ah_attr->sl & 7) << 13;
>  	ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
> -	ah->av.eth.gid_index = mlx4_ib_gid_index_to_real_index(ibdev, ah_attr->port_num, ah_attr->grh.sgid_index);
> +	ret = mlx4_ib_gid_index_to_real_index(ibdev, ah_attr->port_num, ah_attr->grh.sgid_index);
> +	if (ret < 0)
> +		return ERR_PTR(ret);
> +	ah->av.eth.gid_index = ret;
>  	ah->av.eth.vlan = cpu_to_be16(vlan_tag);
>  	ah->av.eth.hop_limit = ah_attr->grh.hop_limit;
>  	if (ah_attr->static_rate) {
> -- 
> 2.7.4
> 
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