Re: [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy constant and NUL

["Shaikh, Shahed" <Shahed.Shaikh@cavium.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Bruce Richardson
> Sent: Tuesday, May 8, 2018 2:53 PM
> To: dev-bounces@dpdk.org
> Cc: Andy Green <andy@warmcat.com>; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy constant
> and NUL
> 
> On Tue, May 08, 2018 at 05:59:47PM +0000, dev-bounces@dpdk.org wrote:
> >
> >
> > > -----Original Message-----
> > > From: dev <dev-bounces@dpdk.org> On Behalf Of Andy Green
> > > Sent: Monday, May 7, 2018 11:30 PM
> > > To: dev@dpdk.org
> > > Subject: [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy
> > > constant and NUL
> > >
> > >
> > > ---
> > >  drivers/net/qede/base/ecore_int.c |   10 ++++++----
> > >  1 file changed, 6 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/net/qede/base/ecore_int.c
> > > b/drivers/net/qede/base/ecore_int.c
> > > index f43781ba4..c809d84ef 100644
> > > --- a/drivers/net/qede/base/ecore_int.c
> > > +++ b/drivers/net/qede/base/ecore_int.c
> > > @@ -1103,10 +1103,12 @@ static enum _ecore_status_t
> > > ecore_int_deassertion(struct ecore_hwfn *p_hwfn,
> > >  						OSAL_SNPRINTF(bit_name, 30,
> > >  							      p_aeu->bit_name,
> > >  							      num);
> > > -					else
> > > -						OSAL_STRNCPY(bit_name,
> > > -							     p_aeu->bit_name,
> > > -							     30);
> > > +					else {
> > > +						strncpy(bit_name,
> > > +							p_aeu->bit_name,
> > > +							sizeof(bit_name) - 1);
> > > +						bit_name[sizeof(bit_name) - 1]
> > > = '\0';
> > > +					}
> >
> > I think you can retain OSAL_STRNCPY and just replace 30 with
> 'bit_name[sizeof(bit_name) - 1'  and then set last byte with '\0' just like you did.
> 
> Can that actually be fixed inside OSAL_STRNCPY itself, rather than having each
> use needing to explicitly null-terminate?

Although there is only instance of OSAL_STRNCPY, it makes sense to modify it.

Thanks,
Shahed