linux-kernel - Re: [PATCH] drm/ttm: add __user annotation in radeon_ttm_vram_read

Open Source and information security mailing list archives

Date:   Thu, 1 Apr 2021 17:15:29 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Christian König <ckoenig.leichtzumerken@...il.com>
Cc:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Alex Deucher <alexander.deucher@....com>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH] drm/ttm: add __user annotation in radeon_ttm_vram_read

Current code already contains the fix.

Alex

On Thu, Apr 1, 2021 at 9:09 AM Christian König
<ckoenig.leichtzumerken@...il.com> wrote:
>
> Am 24.10.20 um 02:47 schrieb Rasmus Villemoes:
> > Keep sparse happy by preserving the __user annotation when casting.
> >
> > Reported-by: kernel test robot <lkp@...el.com>
> > Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
>
> Reviewed-by: Christian König <christian.koenig@....com>
>
> Going over old patches and stumbled over that once.
>
> Alex did you missed to pick it up?
>
> Regards,
> Christian.
>
> > ---
> >
> > kernel test robot has already started spamming me due to 9c5743dff. If
> > I don't fix those warnings I'll keep getting those emails for
> > months, so let me do the easy ones.
> >
> >
> >   drivers/gpu/drm/radeon/radeon_ttm.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> > index 36150b7f31a90aa1eece..ecfe88b0a35d8f317712 100644
> > --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> > +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> > @@ -1005,7 +1005,7 @@ static ssize_t radeon_ttm_vram_read(struct file *f, char __user *buf,
> >               value = RREG32(RADEON_MM_DATA);
> >               spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
> >
> > -             r = put_user(value, (uint32_t *)buf);
> > +             r = put_user(value, (uint32_t __user *)buf);
> >               if (r)
> >                       return r;
> >
>
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> amd-gfx@...ts.freedesktop.org
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