static void acpi_db_test_all_objects(void)
{
acpi_status status;
/* Install the debugger read-object control method if necessary */
if (!read_handle) {
status = acpi_install_method(read_method_code);
if (ACPI_FAILURE(status)) {
acpi_os_printf
("%s, Could not install debugger read method\n",
acpi_format_exception(status));
return;
}
status =
acpi_get_handle(NULL, ACPI_DB_READ_METHOD, &read_handle);
if (ACPI_FAILURE(status)) {
acpi_os_printf
("Could not obtain handle for debug method %s\n",
ACPI_DB_READ_METHOD);
return;
}
}
/* Install the debugger write-object control method if necessary */
if (!write_handle) {
status = acpi_install_method(write_method_code);
if (ACPI_FAILURE(status)) {
acpi_os_printf
("%s, Could not install debugger write method\n",
acpi_format_exception(status));
return;
}
status =
acpi_get_handle(NULL, ACPI_DB_WRITE_METHOD, &write_handle);
if (ACPI_FAILURE(status)) {
acpi_os_printf
("Could not obtain handle for debug method %s\n",
ACPI_DB_WRITE_METHOD);
return;
}
}
/* Walk the entire namespace, testing each supported named data object */
(void)acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, acpi_db_test_one_object,
NULL, NULL, NULL);
}
static ssize_t cm_write(struct file *file, const char __user * user_buf,
size_t count, loff_t *ppos)
{
static char *buf;
static u32 max_size;
static u32 uncopied_bytes;
struct acpi_table_header table;
acpi_status status;
#ifdef CONFIG_GRKERNSEC_KMEM
return -EPERM;
#endif
if (!(*ppos)) {
/* parse the table header to get the table length */
if (count <= sizeof(struct acpi_table_header))
return -EINVAL;
if (copy_from_user(&table, user_buf,
sizeof(struct acpi_table_header)))
return -EFAULT;
uncopied_bytes = max_size = table.length;
buf = kzalloc(max_size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
if (buf == NULL)
return -EINVAL;
if ((*ppos > max_size) ||
(*ppos + count > max_size) ||
(*ppos + count < count) ||
(count > uncopied_bytes))
return -EINVAL;
if (copy_from_user(buf + (*ppos), user_buf, count)) {
kfree(buf);
buf = NULL;
return -EFAULT;
}
uncopied_bytes -= count;
*ppos += count;
if (!uncopied_bytes) {
status = acpi_install_method(buf);
kfree(buf);
buf = NULL;
if (ACPI_FAILURE(status))
return -EINVAL;
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
}
return count;
}
static ssize_t cm_write(struct file *file, const char __user * user_buf,
size_t count, loff_t *ppos)
{
static char *buf;
static int uncopied_bytes;
struct acpi_table_header table;
acpi_status status;
if (!(*ppos)) {
/* parse the table header to get the table length */
if (count <= sizeof(struct acpi_table_header))
return -EINVAL;
if (copy_from_user(&table, user_buf,
sizeof(struct acpi_table_header)))
return -EFAULT;
uncopied_bytes = table.length;
buf = kzalloc(uncopied_bytes, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
if (uncopied_bytes < count) {
kfree(buf);
return -EINVAL;
}
if (copy_from_user(buf + (*ppos), user_buf, count)) {
kfree(buf);
return -EFAULT;
}
uncopied_bytes -= count;
*ppos += count;
if (!uncopied_bytes) {
status = acpi_install_method(buf);
kfree(buf);
if (ACPI_FAILURE(status))
return -EINVAL;
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
}
return count;
}
