Re: [PATCH] Fix a memory leak in the i386 setup code

["Catalin Marinas" <catalin.marinas@gmail.com>]

On 10/07/06, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> Does x86_64 need a similar fix?

Doesn't look like it needs this.

> On Tuesday 11 July 2006 00:13, Catalin Marinas wrote:
> > --- a/arch/i386/kernel/setup.c
> > +++ b/arch/i386/kernel/setup.c
> > @@ -1327,7 +1327,10 @@ #endif
> >               res->start = e820.map[i].addr;
> >               res->end = res->start + e820.map[i].size - 1;
> >               res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
> > -             request_resource(&iomem_resource, res);
> > +             if (request_resource(&iomem_resource, res)) {
> > +                     kfree(res);
> > +                     continue;
> > +             }
> >               if (e820.map[i].type == E820_RAM) {
> >                       /*
> >                        *  We don't know which RAM region contains kernel data,
>
> Evidently res is used if e820.map[i].type == E820_RAM, so it should
> be freed later on, it seems.

The "if" block I added has a "continue" and therefore the E820_RAM
case is skipped. There is no point in requesting a resource with "res"
as parent when "res" couldn't be successfully acquired.

-- 
Catalin