Re: [PATCH v3] Check and report for incomplete 'global' option format

[Markus Armbruster <armbru@redhat.com>]

Rohit Kumar <rohit.kumar3@nutanix.com> writes:

> Qemu might crash when provided incomplete '-global' option.
> For example:
>      qemu-system-x86_64 -global driver=isa-fdc
>      qemu-system-x86_64: ../../devel/qemu/qapi/string-input-visitor.c:394:
>      string_input_visitor_new: Assertion `str' failed.
>      Aborted (core dumped)
>
> Fixes: 3751d7c43f795b ("vl: allow full-blown QemuOpts syntax for -global")
> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/604
> Signed-off-by: Rohit Kumar <rohit.kumar3@nutanix.com>
> ---
>  diff to v2:
>   - Avoided double reporting of error.
>   - Added the "Fixes" line in the commit message.
>
>  softmmu/qdev-monitor.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c
> index 01f3834db5..e918ab8bf3 100644
> --- a/softmmu/qdev-monitor.c
> +++ b/softmmu/qdev-monitor.c
> @@ -1034,6 +1034,13 @@ int qemu_global_option(const char *str)
>      if (!opts) {
>          return -1;
>      }
> +    if (!qemu_opt_get(opts, "driver")
> +        || !qemu_opt_get(opts, "property")
> +        || !qemu_opt_get(opts, "value")) {
> +        error_report("options 'driver', 'property', and 'value'"
> +                     " are required");
> +        return -1;
> +    }
>  
>      return 0;
>  }

Reviewed-by: Markus Armbruster <armbru@redhat.com>