Re: FIX [1/2] slub: Do not dereference NULL pointer in node_match

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On Fri, 25 Jan 2013, Simon Jeons wrote:

> >
> > node_match(NULL, xx) = 0
> >
> >  	->
> >
> > call into __slab_alloc.
> >
> > __slab_alloc() will check for !c->page which requires the assignment of a
> > new per cpu slab page.
> >
>
> But there are dereference in page_to_nid path, function page_to_section:
> return (page->flags >> SECTIONS_PGSHIFT) & SECTIONS_MASK;

node_match() checks for NULL and will not invoke page_to_nid for a NULL
pointer.

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