[libvirt] [PATCH 13/26] qemu: Resolve Coverity FORWARD_NULL

[Wang Rui]

On 2014/9/5 6:26, John Ferlan wrote:
> If the virJSONValueNewObject() fails, then rather than going to error
> and getting a Coverity false positive since it doesn't seem to understand
> the relationship between nkeywords, keywords, and values and seems to
> believe calling qemuFreeKeywords will cause a NULL deref - just return NULL
> 
> Signed-off-by: John Ferlan <jferlan at redhat.com>
> ---
>  src/qemu/qemu_monitor_json.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
> index 62e7d5d..b0bc5fc 100644
> --- a/src/qemu/qemu_monitor_json.c
> +++ b/src/qemu/qemu_monitor_json.c
> @@ -617,7 +617,7 @@ qemuMonitorJSONKeywordStringToJSON(const char *str, const char *firstkeyword)
>      size_t i;
>  
>      if (!(ret = virJSONValueNewObject()))
> -        goto error;
> +        return NULL;

Maybe it's not enough.

>      if (qemuParseKeywords(str, &keywords, &values, &nkeywords, 1) < 0)
>          goto error;

Here, qemuParseKeywords() may fail and 'values' is still NULL.