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Re: [PATCH 2/2] avoid dereference of null pointer
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From: |
Marin Ramesa |
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Subject: |
Re: [PATCH 2/2] avoid dereference of null pointer |
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Date: |
Sun, 10 Nov 2013 18:16:20 +0100 |
On 10.11.2013 16:53:39, Samuel Thibault wrote:
> Marin Ramesa, le Sun 10 Nov 2013 16:46:30 +0100, a écrit :
> > Check to see if pte is a null pointer and perform dereference only
> > if that is not the case.
> >
> > * i386/intel/pmap.c (pte): Check if it is a null pointer.
>
> Well, it can never be null, since earlier in the code we see the pv_h
> pointing to a map which has the physical page mapped somewhere.
OK, thanks. I assumed pmap_pte() returns NULL since clang reports say
pte is a null pointer.