[AMD Public Use]
Reviewed-by : Jinzhou Su <Jinzhou.Su@xxxxxxx>
Regards,
Joe
-----Original Message-----
From: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
Sent: Thursday, January 14, 2021 12:17 PM
To: Su, Jinzhou (Joe) <Jinzhou.Su@xxxxxxx>; Alex Deucher <alexdeucher@xxxxxxxxx>; amd-gfx list <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [PATCH] drm/amdgpu: check the result of copy_from_user in secure display debugfs (v2)
[AMD Public Use]
> -----Original Message-----
> From: Su, Jinzhou (Joe) <Jinzhou.Su@xxxxxxx>
> Sent: Wednesday, January 13, 2021 10:27 PM
> To: Alex Deucher <alexdeucher@xxxxxxxxx>; amd-gfx list <amd-
> gfx@xxxxxxxxxxxxxxxxxxxxx>
> Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
> Subject: RE: [PATCH] drm/amdgpu: check the result of copy_from_user in
> secure display debugfs (v2)
>
> [AMD Official Use Only - Internal Distribution Only]
>
> Thanks, Alex!
Can I get a Reviewed-by or Acked-by?
Thanks!
Alex
>
> Regards,
> Joe
>
> -----Original Message-----
> From: Alex Deucher <alexdeucher@xxxxxxxxx>
> Sent: Thursday, January 14, 2021 11:24 AM
> To: amd-gfx list <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>; Su, Jinzhou (Joe)
> <Jinzhou.Su@xxxxxxx>
> Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
> Subject: Re: [PATCH] drm/amdgpu: check the result of copy_from_user in
> secure display debugfs (v2)
>
> + Joe
>
> On Mon, Jan 4, 2021 at 12:53 PM Alex Deucher <alexdeucher@xxxxxxxxx>
> wrote:
> >
> > Make sure the copy succeeded. Also fixes a warning.
> >
> > v2: fix the error check
> >
> > Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
> > index 455978781380..b033344c5ce2 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
> > @@ -101,7 +101,9 @@ static ssize_t
> amdgpu_securedisplay_debugfs_write(struct file *f, const char __u
> > return -EINVAL;
> >
> > memset(str, 0, sizeof(str));
> > - copy_from_user(str, buf, size);
> > + ret = copy_from_user(str, buf, size);
> > + if (ret)
> > + return -EFAULT;
> >
> > ret = pm_runtime_get_sync(dev->dev);
> > if (ret < 0) {
> > --
> > 2.29.2
> >
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