[dpdk-dev] [PATCH] net/af_xdp: use snprintf instead of strncpy

[Olivier Matz]

On Wed, Oct 07, 2020 at 10:40:32AM +0100, Ferruh Yigit wrote:
> On 10/7/2020 10:01 AM, Ciara Loftus wrote:
> > strncpy may leave the destination buffer not NULL terminated so use
> > snprintf instead.
> 
> What do you think using 'strlcpy'?

Or even better, rte_strscpy()
https://git.dpdk.org/dpdk/commit/?id=b0236c7cf761

> 
> > 
> > Coverity issue: 362975
> > Fixes: 339b88c6a91f ("net/af_xdp: support multi-queue")
> > Signed-off-by: Ciara Loftus <ciara.loftus at intel.com>
> > ---
> >   drivers/net/af_xdp/rte_eth_af_xdp.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
> > index eaf2c9c873..52495cb8fb 100644
> > --- a/drivers/net/af_xdp/rte_eth_af_xdp.c
> > +++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
> > @@ -1362,7 +1362,7 @@ xdp_get_channels_info(const char *if_name, int *max_queues,
> >   	channels.cmd = ETHTOOL_GCHANNELS;
> >   	ifr.ifr_data = (void *)&channels;
> > -	strncpy(ifr.ifr_name, if_name, IFNAMSIZ);
> > +	snprintf(ifr.ifr_name, IFNAMSIZ, "%s", if_name);
> >   	ret = ioctl(fd, SIOCETHTOOL, &ifr);
> >   	if (ret) {
> >   		if (errno == EOPNOTSUPP) {
> > 
>