REGRESSION (r250728): Use-after-move in NetworkProcess::addServiceWorkerSession()

[David Kilzer (:ddkilzer)]

Use-after-move in NetworkProcess::addServiceWorkerSession() of `serviceWorkerRegistrationDirectory` parameter:

void NetworkProcess::addServiceWorkerSession(PAL::SessionID sessionID, bool processTerminationDelayEnabled, String&& serviceWorkerRegistrationDirectory, const SandboxExtension::Handle& handle)
{
    ServiceWorkerInfo info {
        WTFMove(serviceWorkerRegistrationDirectory),
        processTerminationDelayEnabled
    };
    auto addResult = m_serviceWorkerInfo.add(sessionID, WTFMove(info));
    if (addResult.isNewEntry) {
        SandboxExtension::consumePermanently(handle);
        if (!serviceWorkerRegistrationDirectory.isEmpty())
            postStorageTask(createCrossThreadTask(*this, &NetworkProcess::ensurePathExists, serviceWorkerRegistrationDirectory));
    }
}

The postStorageTask() will never run because `serviceWorkerRegistrationDirectory.isEmpty()` is always true.

[Radar WebKit Bug Importer]

<rdar://problem/61017857>

[David Kilzer (:ddkilzer)]

Created attachment 394849 [details]
Patch v1

[David Kilzer (:ddkilzer)]

This regressed in:

Bug 202553: Move WKProcessPool._registerURLSchemeServiceWorkersCanHandle to _WKWebsiteDataStoreConfiguration
<https://bugs.webkit.org/show_bug.cgi?id=202553>
<rdar://problem/55985536>
<http://trac.webkit.org/r250728>

[EWS]

Committed r259167: <https://trac.webkit.org/changeset/259167>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 394849 [details].