Re: [dpdk-dev] [dpdk-stable] [PATCH] net/i40e: add parameter check for RSS flow init

["Zhao1, Wei" <wei.zhao1@intel.com>]

> -----Original Message-----
> From: Yigit, Ferruh
> Sent: Wednesday, November 14, 2018 7:11 AM
> To: Zhao1, Wei <wei.zhao1@intel.com>; dev@dpdk.org
> Cc: Zhang, Qi Z <qi.z.zhang@intel.com>; stable@dpdk.org; Peng, Yuan
> <yuan.peng@intel.com>
> Subject: Re: [dpdk-stable] [PATCH] net/i40e: add parameter check for RSS
> flow init
> 
> On 11/12/2018 9:25 AM, Wei Zhao wrote:
> > There need an parameter check for RSS flow init, or it may cause core
> > dump if pointer is NULL in memory copy.
> >
> > Fixes: ac8d22de2394 ("ethdev: flatten RSS configuration in flow API")
> >
> > Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
> > ---
> >  drivers/net/i40e/i40e_ethdev.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/i40e/i40e_ethdev.c
> > b/drivers/net/i40e/i40e_ethdev.c index 1c77906..217a8dc 100644
> > --- a/drivers/net/i40e/i40e_ethdev.c
> > +++ b/drivers/net/i40e/i40e_ethdev.c
> > @@ -12552,13 +12552,16 @@ i40e_rss_conf_init(struct
> i40e_rte_flow_rss_conf *out,
> >  	if (in->key_len > RTE_DIM(out->key) ||
> >  	    in->queue_num > RTE_DIM(out->queue))
> >  		return -EINVAL;
> > +	if (!in->key && in->key_len)
> > +		return -EINVAL;
> > +	if (out->key && in->key)
> > +		out->conf.key = memcpy(out->key, in->key, in->key_len);
> 
> Giving following warning [1] with clang, which looks like valid warning.
> i40e_rte_flow_rss_conf->key is an array, no need to check its address.

Yes, you are right, thanks.

> 
> I will remove it while merging.
> 
> [1]
> .../drivers/net/i40e/i40e_ethdev.c:12557:11: error: address of array 'out-
> >key'
> will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]
> 
> 
>         if (out->key && in->key)
>             ~~~~~^~~ ~~
> 
> >  	out->conf = (struct rte_flow_action_rss){
> >  		.func = in->func,
> >  		.level = in->level,
> >  		.types = in->types,
> >  		.key_len = in->key_len,
> >  		.queue_num = in->queue_num,
> > -		.key = memcpy(out->key, in->key, in->key_len),
> >  		.queue = memcpy(out->queue, in->queue,
> >  				sizeof(*in->queue) * in->queue_num),
> >  	};
> >