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invtsc_mig_blocker has static storage duration. When a CPU with certain features is initialized, and invtsc_mig_blocker is still null, we add a migration blocker and store it in invtsc_mig_blocker. The object is freed when migrate_add_blocker() fails, leaving invtsc_mig_blocker dangling. It is not freed on later failures. Same for hv_passthrough_mig_blocker and hv_no_nonarch_cs_mig_blocker. All failures are actually fatal, so whether we free or not doesn't really matter, except as bad examples to be copied / imitated. Clean this up in a minimal way: never free these blocker objects. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210720125408.387910-7-armbru@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com>