[dpdk-dev] [PATCH] app/testpmd: fix copying the name of the dynflag

[Iremonger, Bernard]

Hi Ori,

> -----Original Message-----
> From: Ori Kam <orika at mellanox.com>
> Sent: Thursday, January 30, 2020 1:23 PM
> To: Lu, Wenzhuo <wenzhuo.lu at intel.com>; Wu, Jingjing
> <jingjing.wu at intel.com>; Iremonger, Bernard
> <bernard.iremonger at intel.com>
> Cc: dev at dpdk.org; orika at mellanox.com; Yigit, Ferruh
> <ferruh.yigit at intel.com>; viacheslavo at mellanox.com
> Subject: [PATCH] app/testpmd: fix copying the name of the dynflag
> 
> When working with testpmd and setting the dynflag name, we copy the
> name given by the cmd to the dynflag name.
> 
> The issue is that the size of the dynflag name is smaller then the string used
> by testpmd.
> 
> This commit solves this issue by usign strncpy.
> 
> Coverity issue: 353610
> 
> Fixes: b57b66a97ebf ("app/testpmd: support mbuf dynamic flag")
> 
> Signed-off-by: Ori Kam <orika at mellanox.com>
> ---
>  app/test-pmd/cmdline.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c index
> dab22bc..09429f9 100644
> --- a/app/test-pmd/cmdline.c
> +++ b/app/test-pmd/cmdline.c
> @@ -18867,7 +18867,7 @@ struct cmd_config_tx_dynf_specific_result {
>  		return;
>  	flag = rte_mbuf_dynflag_lookup(res->name, NULL);
>  	if (flag <= 0) {
> -		strcpy(desc_flag.name, res->name);
> +		strncpy(desc_flag.name, res->name,
> sizeof(*desc_flag.name));

This does not look correct to me.
Should it be sizeof(desc_flag.name[RTE_MBUF_DYN_NAMESIZE]));

>  		desc_flag.flags = 0;
>  		flag = rte_mbuf_dynflag_register(&desc_flag);
>  		if (flag < 0) {
> --
> 1.8.3.1

Regards,

Bernard.