On Mon, May 11, 2015 at 06:33:00 -0400, John Ferlan wrote:
>
>
> On 04/30/2015 08:44 AM, Peter Krempa wrote:
> > Add virDomainObjListConvert that will take a list of virDomains, apply
> > filters and return a list of virDomainObjs.
> > ---
> > src/conf/domain_conf.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++
> > src/conf/domain_conf.h | 9 ++++++++
> > src/libvirt_private.syms | 1 +
> > 3 files changed, 64 insertions(+)
> >
> > diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> > index 66fe470..73dc33f 100644
> > --- a/src/conf/domain_conf.c
> > +++ b/src/conf/domain_conf.c
> > @@ -23072,6 +23072,60 @@ virDomainObjListCollect(virDomainObjListPtr domlist,
> >
> >
> > int
> > +virDomainObjListConvert(virDomainObjListPtr domlist,
> > + virConnectPtr conn,
> > + virDomainPtr *doms,
> > + size_t ndoms,
> > + virDomainObjPtr **vms,
> > + size_t *nvms,
> > + virDomainObjListACLFilter filter,
> > + unsigned int flags,
> > + bool skip_missing)
> > +{
> > + char uuidstr[VIR_UUID_STRING_BUFLEN];
> > + virDomainObjPtr vm;
> > + size_t i;
> > +
> > + *nvms = 0;
> > + *vms = NULL;
> > +
> > + virObjectLock(domlist);
> > + for (i = 0; i < ndoms; i++) {
> > + virDomainPtr dom = doms[i];
> > +
> > + virUUIDFormat(dom->uuid, uuidstr);
> > +
> > + if (!(vm = virHashLookup(domlist->objs, uuidstr))) {
> > + if (!skip_missing) {
> > + virReportError(VIR_ERR_NO_DOMAIN,
> > + _("no domain with matching uuid '%s' (%s)"),
> > + uuidstr, dom->name);
> > + virObjectUnlock(domlist);
> > + goto error;
> > + }
> > + } else {
> > + virObjectRef(vm);
> > +
> > + if (VIR_APPEND_ELEMENT(*vms, *nvms, vm) < 0)
> > + goto error;
> > + }
> > + }
> > + virObjectUnlock(domlist);
> > +
> > + virDomainObjListFilter(vms, nvms, conn, filter, flags);
>
> Coverity complains here too - if 'vms' is NULL, then ObjListFilter
> derefs. Coverity shows an example of ndoms == 2 and for each iteration
> through the loop it takes the skip_missing path.
False positive again. If every domain is skipped, then nvms will never
be incremented from it's 0 state where it was pre-set.
virDomainObjListFilter then iterates from 0 while it's less than the
value stored in ndoms ( which is 0) thus it never touches @vms.
Peter
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