Re: [Xen-devel] [PATCH 2/3] tools/libxl/libxl_cpuid.c: Fix leak of resstr on error path

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Mon, Mar 16, 2015 at 10:06:17AM +0000, PRAMOD DEVENDRA wrote:
> From: Pramod Devendra <pramod.devendra@xxxxxxxxxx>
> 
> Signed-off-by: Pramod Devendra <pramod.devendra@xxxxxxxxxx>
> CC: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> CC: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> CC: Ian Campbell <ian.campbell@xxxxxxxxxx>
> CC: Wei Liu <wei.liu2@xxxxxxxxxx>

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

> ---
>  tools/libxl/libxl_cpuid.c |    8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/libxl/libxl_cpuid.c b/tools/libxl/libxl_cpuid.c
> index b0bdc9d..c66e912 100644
> --- a/tools/libxl/libxl_cpuid.c
> +++ b/tools/libxl/libxl_cpuid.c
> @@ -223,9 +223,6 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list 
> *cpuid, const char* str)
>      }
>      entry = cpuid_find_match(cpuid, flag->leaf, flag->subleaf);
>      resstr = entry->policy[flag->reg - 1];
> -    if (resstr == NULL) {
> -        resstr = strdup("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
> -    }

Minor nit. I would prefer "resstr = " be grouped with the code you
moved. No need to resend though.

Wei.

>      num = strtoull(val, &endptr, 0);
>      flags[flag->length] = 0;
>      if (endptr != val) {
> @@ -242,6 +239,11 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list 
> *cpuid, const char* str)
>              return 3;
>          }
>      }
> +
> +    if (resstr == NULL) {
> +        resstr = strdup("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
> +    }
> +
>      /* the family and model entry is potentially split up across
>       * two fields in Fn0000_0001_EAX, so handle them here separately.
>       */
> -- 
> 1.7.10.4

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