Re: [Qemu-devel] [PATCH for-2.4 1/2] qom: Do not reuse errp after a possible error

[Daniel P. Berrange]

On Wed, Jul 01, 2015 at 05:47:03PM +0200, Markus Armbruster wrote:
> The argument for an Error **errp parameter must point to a null
> pointer.  If it doesn't, and an error happens, error_set() fails its
> assertion.
> 
> Instead of
> 
>     foo(foos, errp);
>     bar(bars, errp);
> 
> you need to do something like
> 
>     Error *err = NULL;
> 
>     foo(foos, &err);
>     if (err) {
>         error_propagate(errp, err);
>         goto out;
>     }
> 
>     bar(bars, errp);
> out:
> 
> Screwed up in commit 0e55884 (v1.3.0): property_get_bool().
> 
> Screwed up in commit 1f21772 (v2.1.0): object_property_get_enum() and
> object_property_get_uint16List().
> 
> Screwed up in commit a8e3fbe (not yet released): property_get_enum(),
> property_set_enum().
> 
> Found by inspection, no actual crashes observed.
> 
> Fix them up.
> 
> Cc: Andreas Färber <address@hidden>
> Cc: Anthony Liguori <address@hidden>
> Cc: Hu Tao <address@hidden
> Cc: Daniel P. Berrange <address@hidden>
> Signed-off-by: Markus Armbruster <address@hidden>

Looks good to me.

Reviewed-by: Daniel P. Berrange <address@hidden>

Regards,
Daniel
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