Re: [EXTERNAL] [PATCH v2] app/graph: fix destination buffer too small

[Mahmoud Matook <mahmoudmatook.mm@gmail.com>]

On 06/25, Kiran Kumar Kokkilagadda wrote:

> 
> 
> From: Mahmoud Maatuq <mahmoudmatook.mm@gmail.com>
> Sent: Tuesday, June 25, 2024 1:31 AM
> To: Sunil Kumar Kori <skori@marvell.com>; Rakesh Kudurumalla <rkudurumalla@marvell.com>; Nithin Kumar Dabilpuram <ndabilpuram@marvell.com>; Jerin Jacob <jerinj@marvell.com>
> Cc: dev@dpdk.org; Mahmoud Maatuq <mahmoudmatook.mm@gmail.com>
> Subject: [EXTERNAL] [PATCH v2] app/graph: fix destination buffer too small
> 
> as sizeof(config. rx. mempool_name) is < sizeof(res->mempool) we should copy at most sizeof(config. rx. mempool_name) and replace memcpy with strlcpy as mempool name is a null terminated string Coverity issue: 415430 Fixes: 3850cb06ab9c ("app/graph: 
> 
> 
> as sizeof(config.rx.mempool_name) is < sizeof(res->mempool) we should
> 
> copy at most sizeof(config.rx.mempool_name) and replace memcpy with
> 
> strlcpy as mempool name is a null terminated string
> 
> 
> 
> Coverity issue: 415430
> 
> Fixes: 3850cb06ab9c ("app/graph: add ethdev commands")
> 
> Cc: skori@marvell.com<mailto:skori@marvell.com>
> 
> 
> 
> Signed-off-by: Mahmoud Maatuq <mahmoudmatook.mm@gmail.com<mailto:mahmoudmatook.mm@gmail.com>>
> 
> ---
> 
> v2:
> 
> * replaced memcpy with strlcpy
> 
> ---
> 
>  app/graph/ethdev.c | 3 ++-
> 
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> 
> 
> diff --git a/app/graph/ethdev.c b/app/graph/ethdev.c
> 
> index cfc1b18569..e7a02b40a9 100644
> 
> --- a/app/graph/ethdev.c
> 
> +++ b/app/graph/ethdev.c
> 
> @@ -16,6 +16,7 @@
> 
> 
> 
>  #include "ethdev_priv.h"
> 
>  #include "module_api.h"
> 
> +#include "rte_string_fns.h"
> 
> 
> 
>  static const char
> 
>  cmd_ethdev_mtu_help[] = "ethdev <ethdev_name> mtu <mtu_sz>";
> 
> @@ -671,7 +672,7 @@ cmd_ethdev_parsed(void *parsed_result, __rte_unused struct cmdline *cl, void *da
> 
>               memset(&config, 0, sizeof(struct ethdev_config));
> 
>               config.rx.n_queues = res->nb_rxq;
> 
>               config.rx.queue_size = ETHDEV_RX_DESC_DEFAULT;
> 
> -            memcpy(config.rx.mempool_name, res->mempool, strlen(res->mempool));
> 
> +           strlcpy(config.rx.mempool_name, res->mempool, sizeof(config.rx.mempool_name));
> 
> 
> 
> Can be changed to strlcpy(config.rx.mempool_name, res->mempool->name, sizeof(config.rx.mempool_name)); ?

mempool field is of type cmdline_fixed_string_t (array of char)

> 
> 
> 
>               config.tx.n_queues = res->nb_txq;
> 
>               config.tx.queue_size = ETHDEV_TX_DESC_DEFAULT;
> 
> --
> 
> 2.43.0
> 
>