Re: [PATCH v2] cpus: Fix botched configure_icount() error API violation fix

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 5/15/20 6:22 AM, Markus Armbruster wrote:
> Before recent commit abc9bf69a66, configure_icount() returned early
> when option "shift" was absent: succeed when option "align" was also
> absent, else fail.
> 
> Since then, it still errors out when only "align" is present, but
> continues when both are absent.  Crashes when examining the value of
> "shift" further.  Reproducer: -icount "".
> 
> Revert this erroneous part of the commit.
> 
> Fixes: abc9bf69a66a11499a801ff545b8fe7adbb3a04c
> Fixes: Coverity CID 1428754
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> ---
>   cpus.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/cpus.c b/cpus.c
> index 5670c96bcf..ee906dd08f 100644
> --- a/cpus.c
> +++ b/cpus.c
> @@ -803,8 +803,10 @@ void configure_icount(QemuOpts *opts, Error **errp)
>       bool align = qemu_opt_get_bool(opts, "align", false);
>       long time_shift = -1;
>   
> -    if (!option && qemu_opt_get(opts, "align")) {
> -        error_setg(errp, "Please specify shift option when using align");
> +    if (!option) {
> +        if (qemu_opt_get(opts, "align") != NULL) {

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> +            error_setg(errp, "Please specify shift option when using align");
> +        }
>           return;
>       }
>   
>