PasswordStore::FormDigest CredentialManagerImpl::GetSynthesizedFormForOrigin()
    const {
  PasswordStore::FormDigest digest = {autofill::PasswordForm::SCHEME_HTML,
                                      std::string(),
                                      GetLastCommittedURL().GetOrigin()};
  digest.signon_realm = digest.origin.spec();
  return digest;
}

The product reads data past the end, or before the beginning, of the intended buffer.