linux-kernel - Re: [PATCH 1/3] scsi: aacraid: improve compat

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Message-ID: <CAK8P3a085LEAtMagNm0++UHGKjntYE-6yg_6+VzG96a-hgia_Q@mail.gmail.com>
Date:   Thu, 17 Sep 2020 17:02:16 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Adaptec OEM Raid Solutions <aacraid@...rosemi.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Balsundar P <balsundar.p@...rosemi.com>,
        Zou Wei <zou_wei@...wei.com>, Hannes Reinecke <hare@...e.de>,
        Sagar Biradar <Sagar.Biradar@...rochip.com>,
        linux-scsi <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] scsi: aacraid: improve compat_ioctl handlers

On Sat, Sep 12, 2020 at 9:09 AM Christoph Hellwig <hch@...radead.org> wrote:
>
> On Tue, Sep 08, 2020 at 11:36:21PM +0200, Arnd Bergmann wrote:
> > @@ -243,8 +244,23 @@ static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
> >       struct list_head * entry;
> >       unsigned long flags;
> >
> > -     if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
> > -             return -EFAULT;
> > +     if (in_compat_syscall()) {
> > +             struct compat_fib_ioctl {
> > +                     u32     fibctx;
> > +                     s32     wait;
> > +                     compat_uptr_t fib;
> > +             } cf;
>
> I find the struct declaration deep down in the function a little
> annoying.
>
> But otherwise this looks good;
>
> Reviewed-by: Christoph Hellwig <hch@....de>

I got back to these patches now and moved the struct definition, plus
fixed a typo I noticed while doing so. Thanks!

      Arnd