Re: [PATCH] libxc: Fix CID 1351228 resource leak

[Dario Faggioli <dario.faggioli@citrix.com>]

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On Wed, 2016-02-10 at 14:39 +0530, Harmandeep Kaur wrote:
>
What I just said about the other patch ("libxc: Fix CID 1351225
resource leak") applies here as well, of course. :-)

About the code...

> --- a/tools/libxc/xc_tbuf.c
> +++ b/tools/libxc/xc_tbuf.c
> @@ -70,9 +70,13 @@ int xc_tbuf_get_size(xc_interface *xch, unsigned
> long *size)
>                      sysctl.u.tbuf_op.buffer_mfn);
>  
>      if ( t_info == NULL || t_info->tbuf_size == 0 )
> +    {
> +        xenforeignmemory_unmap(xch->fmem, t_info, 0);
>          return -1;
> +    }
>  
>      *size = t_info->tbuf_size;
> +    xenforeignmemory_unmap(xch->fmem, t_info, *size);
>  
I think you can arrange for only calling the unmapping function once,
i.e., put the unmap call in a place where (after a slight
reorganization of the rest of the code as well) it can be common to
both the success and error path.

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)


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