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authorLin Ming <ming.m.lin@intel.com>2009-10-13 10:34:56 +0800
committerLen Brown <len.brown@intel.com>2009-11-24 20:30:05 -0500
commit50b77eda9b12ff0ccf12b4021b7193d71778c0a9 (patch)
treeb3a72fbe73f59be9aa2a4afe5a712e1af2d1bf18 /drivers
parent74d3ec77a5e0633b0c7a8490941432c2e4789037 (diff)
ACPICA: Fix possible memory leak for Scope ASL operator
Using Scope(\) to change the scope to the root could cause a single object memory leak. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/acpica/dswload.c50
1 files changed, 33 insertions, 17 deletions
diff --git a/drivers/acpi/acpica/dswload.c b/drivers/acpi/acpica/dswload.c
index 6de3a99d4cd..10fc7851784 100644
--- a/drivers/acpi/acpica/dswload.c
+++ b/drivers/acpi/acpica/dswload.c
@@ -639,26 +639,42 @@ acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
break;
case AML_SCOPE_OP:
- /*
- * The Path is an object reference to an existing object.
- * Don't enter the name into the namespace, but look it up
- * for use later.
- */
- status =
- acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
- object_type, ACPI_IMODE_EXECUTE,
- ACPI_NS_SEARCH_PARENT, walk_state, &(node));
- if (ACPI_FAILURE(status)) {
-#ifdef ACPI_ASL_COMPILER
- if (status == AE_NOT_FOUND) {
- status = AE_OK;
- } else {
- ACPI_ERROR_NAMESPACE(buffer_ptr, status);
+
+ /* Special case for Scope(\) -> refers to the Root node */
+
+ if (op && (op->named.node == acpi_gbl_root_node)) {
+ node = op->named.node;
+
+ status =
+ acpi_ds_scope_stack_push(node, object_type,
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
}
+ } else {
+ /*
+ * The Path is an object reference to an existing object.
+ * Don't enter the name into the namespace, but look it up
+ * for use later.
+ */
+ status =
+ acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
+ object_type, ACPI_IMODE_EXECUTE,
+ ACPI_NS_SEARCH_PARENT, walk_state,
+ &(node));
+ if (ACPI_FAILURE(status)) {
+#ifdef ACPI_ASL_COMPILER
+ if (status == AE_NOT_FOUND) {
+ status = AE_OK;
+ } else {
+ ACPI_ERROR_NAMESPACE(buffer_ptr,
+ status);
+ }
#else
- ACPI_ERROR_NAMESPACE(buffer_ptr, status);
+ ACPI_ERROR_NAMESPACE(buffer_ptr, status);
#endif
- return_ACPI_STATUS(status);
+ return_ACPI_STATUS(status);
+ }
}
/*