Re: [dpdk-dev] [PATCH v1] examples/vhost: fix missing args length check

[Maxime Coquelin <maxime.coquelin@redhat.com>]

On 11/6/20 4:24 AM, Cheng Jiang wrote:
> Add args length check before copying to fix the coverity issue.
> 
> Fixes: 3a04ecb21420 ("examples/vhost: add async vhost args parsing")
> Coverity issue: 363741
> 
> Signed-off-by: Cheng Jiang <Cheng1.jiang@intel.com>
> ---
>  examples/vhost/main.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c
> index 59a1aff07c..ec88874d16 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -634,6 +634,12 @@ us_vhost_parse_args(int argc, char **argv)
>  
>  			if (!strncmp(long_option[option_index].name,
>  						"dma-type", MAX_LONG_OPT_SZ)) {
> +				if (strlen(optarg) >= MAX_LONG_OPT_SZ) {
> +					RTE_LOG(INFO, VHOST_CONFIG,
> +						"Wrong DMA type\n");
> +					us_vhost_usage(prgname);
> +					return -1;
> +				}
>  				strcpy(dma_type, optarg);
>  			}
>  
> 

Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks,
Maxime