dd5b6780f7
exp->common.blk cannot be NULL, nbd_export_delete() is only called (through a bottom half) from blk_exp_unref() and in turn that can only happen after blk_exp_add() has asserted exp->blk != NULL. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>