linux-kernel - Re: [PATCH] tee: fix compiler warning in tee_shm

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Message-ID: <CAHUa44EpnrsYaoLTgwzSOTT=V2XRB5=e_zEJ3gx1jZvYuvGjuw@mail.gmail.com>
Date:   Thu, 25 Aug 2022 10:43:55 +0200
From:   Jens Wiklander <jens.wiklander@...aro.org>
To:     Sumit Garg <sumit.garg@...aro.org>
Cc:     linux-kernel@...r.kernel.org, op-tee@...ts.trustedfirmware.org,
        Jerome Forissier <jerome.forissier@...aro.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] tee: fix compiler warning in tee_shm_register()

On Mon, Aug 22, 2022 at 10:39 AM Sumit Garg <sumit.garg@...aro.org> wrote:
>
> On Mon, 22 Aug 2022 at 13:58, Jens Wiklander <jens.wiklander@...aro.org> wrote:
> >
> > Include <linux/uaccess.h> to avoid the warning:
> >    drivers/tee/tee_shm.c: In function 'tee_shm_register':
> > >> drivers/tee/tee_shm.c:242:14: error: implicit declaration of function 'access_ok' [-Werror=implicit-function-declaration]
> >      242 |         if (!access_ok((void __user *)addr, length))
> >          |              ^~~~~~~~~
> >    cc1: some warnings being treated as errors
> >
> > Fixes: 573ae4f13f63 ("tee: add overflow check in register_shm_helper()")
> > Reported-by: kernel test robot <lkp@...el.com>
> > Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
> > ---
> >  drivers/tee/tee_shm.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
>
> Reviewed-by: Sumit Garg <sumit.garg@...aro.org>

Thanks, I'm picking this up now.

Cheers,
Jens

>
> -Sumit
>
> > diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
> > index 1175f3a46859..27295bda3e0b 100644
> > --- a/drivers/tee/tee_shm.c
> > +++ b/drivers/tee/tee_shm.c
> > @@ -9,6 +9,7 @@
> >  #include <linux/sched.h>
> >  #include <linux/slab.h>
> >  #include <linux/tee_drv.h>
> > +#include <linux/uaccess.h>
> >  #include <linux/uio.h>
> >  #include "tee_private.h"
> >
> > --
> > 2.31.1
> >