Re: [PATCH V3] libxc: Have xc_translate_foreign_address() set errno properly

[Razvan Cojocaru <rcojocaru@bitdefender.com>]

On 03/03/2016 03:58 PM, Razvan Cojocaru wrote:
> Currently it's possible for xc_translate_foreign_address() to fail
> and errno still be set to success. This patch fixes the issue.
> Based on the first half of Don Slutz' patch:
> http://lists.xen.org/archives/html/xen-devel/2014-03/msg03720.html
> 
> Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
> Acked-by: Wei Liu <wei.liu2@citrix.com>
> 
> ---
> Changes since V2:
>  - Fixed description text.
>  - Added Wei Liu's ack.
> ---
>  tools/libxc/xc_pagetab.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/libxc/xc_pagetab.c b/tools/libxc/xc_pagetab.c
> index ec97890..92eebd6 100644
> --- a/tools/libxc/xc_pagetab.c
> +++ b/tools/libxc/xc_pagetab.c
> @@ -88,8 +88,10 @@ unsigned long xc_translate_foreign_address(xc_interface *xch, uint32_t dom,
>              return 0;
>          memcpy(&pte, map + (paddr & (PAGE_SIZE - 1)), size);
>          munmap(map, PAGE_SIZE);
> -        if (!(pte & 1)) 
> +        if (!(pte & 1)) {
> +            errno = EADDRNOTAVAIL;
>              return 0;
> +        }
>          paddr = pte & 0x000ffffffffff000ull;
>          if (level == 2 && (pte & PTE_PSE)) {
>              mask = ((mask ^ ~-mask) >> 1); /* All bits below first set bit */
> 

Should I change something in this patch? It's been roughly two weeks
since the previous message with no commit to staging and no additional
comments, could I have missed a review?


Thanks,
Razvan

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