Re: [PATCH] net/mlx5: fix packet type and offload flags in Rx

[Adrien Mazarguil <adrien.mazarguil@6wind.com>]

On Thu, Jul 07, 2016 at 06:34:45PM +0200, Maxime Leroy wrote:
> In mlx5 rx function, the packet_type and ol_flags mbuf fields are not
> properly initialized when no rx offload feature is enabled (checksum, l2
> tun checksum, vlan_strip, crc). Thus, these fields can have a value
> different of 0 depending on their value when the mbuf was freed.
> 
> This can result in an incorrect application behavior if invalid
> ol_flags/ptype are set, or memory corruptions if IND_ATTACHED_MBUF is
> set in ol_flags.
> 
> Fixes: 081f7eae242e ("mlx5: process offload flags only when requested")
> 
> Signed-off-by: Maxime Leroy <maxime.leroy@6wind.com>
> ---
>  drivers/net/mlx5/mlx5_rxtx.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
> index 0c352f3f..4132fd74 100644
> --- a/drivers/net/mlx5/mlx5_rxtx.c
> +++ b/drivers/net/mlx5/mlx5_rxtx.c
> @@ -1599,6 +1599,8 @@ mlx5_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
>  			pkt = seg;
>  			assert(len >= (rxq->crc_present << 2));
>  			/* Update packet information. */
> +			pkt->packet_type = 0;
> +			pkt->ol_flags = 0;
>  			if (rxq->csum | rxq->csum_l2tun | rxq->vlan_strip |
>  			    rxq->crc_present) {
>  				if (rxq->csum) {
> -- 
> 2.1.4
> 

Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>

-- 
Adrien Mazarguil
6WIND