RE: [PATCH 06/14] ACPICA: Validate start object for acpi_walk_namespace.

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Hi, Bob

Could you help to answer this?
Thanks in advance.

Best regards
-Lv

> From: linux-acpi-owner@xxxxxxxxxxxxxxx [mailto:linux-acpi-owner@xxxxxxxxxxxxxxx] On Behalf Of Len Brown
> Sent: Tuesday, September 17, 2013 8:44 AM
> 
> This was filed an fixed very quickly.
> Is it something we see in the field?
> The patch is small, should we mark it for -stable?
> 
> thanks
> 
> On Thu, Sep 12, 2013 at 4:55 AM, Lv Zheng <lv.zheng@xxxxxxxxx> wrote:
> > From: Bob Moore <robert.moore@xxxxxxxxx>
> >
> > Perform a sanity check on the start object to prevent problems
> > later. ACPICA BZ 1025.
> >
> > Buglink: http://bugs.acpica.org/show_bug.cgi?id=1025
> > Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
> > Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
> > ---
> >  drivers/acpi/acpica/nsxfeval.c |    8 ++++++++
> >  1 file changed, 8 insertions(+)
> >
> > diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c
> > index b38b4b0..481a6b4 100644
> > --- a/drivers/acpi/acpica/nsxfeval.c
> > +++ b/drivers/acpi/acpica/nsxfeval.c
> > @@ -605,11 +605,19 @@ acpi_walk_namespace(acpi_object_type type,
> >                 goto unlock_and_exit;
> >         }
> >
> > +       /* Now we can validate the starting node */
> > +
> > +       if (!acpi_ns_validate_handle(start_object)) {
> > +               status = AE_BAD_PARAMETER;
> > +               goto unlock_and_exit2;
> > +       }
> > +
> >         status = acpi_ns_walk_namespace(type, start_object, max_depth,
> >                                         ACPI_NS_WALK_UNLOCK,
> >                                         descending_callback, ascending_callback,
> >                                         context, return_value);
> >
> > +      unlock_and_exit2:
> >         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
> >
> >        unlock_and_exit:
> > --
> > 1.7.10
> >
> > --
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> 
> 
> 
> --
> Len Brown, Intel Open Source Technology Center
> --
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