Re: [PATCH net 2/2] qed: Fix non TCP packets should be dropped on iWARP ll2 connection

[Joe Perches]

On Wed, 2018-03-14 at 14:49 +0200, Michal Kalderon wrote:
> FW workaround. The iWARP LL2 connection did not expect TCP packets
> to arrive on it's connection. The fix drops any non-tcp packets
[]
> diff --git a/drivers/net/ethernet/qlogic/qed/qed_iwarp.c 
> b/drivers/net/ethernet/qlogic/qed/qed_iwarp.c
[]
> @@ -1703,6 +1703,13 @@ qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
>       iph = (struct iphdr *)((u8 *)(ethh) + eth_hlen);
>  
>       if (eth_type == ETH_P_IP) {
> +             if (iph->protocol != IPPROTO_TCP) {
> +                     DP_NOTICE(p_hwfn,
> +                               "Unexpected ip protocol on ll2 %x\n",
> +                               iph->protocol);
> +                     return -EINVAL;
> +             }

Perhaps this should be ratelimited.

> +
>               cm_info->local_ip[0] = ntohl(iph->daddr);
>               cm_info->remote_ip[0] = ntohl(iph->saddr);
>               cm_info->ip_version = TCP_IPV4;
> @@ -1711,6 +1718,14 @@ qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
>               *payload_len = ntohs(iph->tot_len) - ip_hlen;
>       } else if (eth_type == ETH_P_IPV6) {
>               ip6h = (struct ipv6hdr *)iph;
> +
> +             if (ip6h->nexthdr != IPPROTO_TCP) {
> +                     DP_NOTICE(p_hwfn,
> +                               "Unexpected ip protocol on ll2 %x\n",
> +                               iph->protocol);
> +                     return -EINVAL;

here too

> +             }
> +
>               for (i = 0; i < 4; i++) {
>                       cm_info->local_ip[i] =
>                           ntohl(ip6h->daddr.in6_u.u6_addr32[i]);