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| author | Lin Ming <ming.m.lin@intel.com> | 2009-10-13 10:34:56 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-11-24 20:30:05 -0500 |
| commit | 50b77eda9b12ff0ccf12b4021b7193d71778c0a9 (patch) | |
| tree | b3a72fbe73f59be9aa2a4afe5a712e1af2d1bf18 /drivers | |
| parent | 74d3ec77a5e0633b0c7a8490941432c2e4789037 (diff) | |
| download | linux-stable-50b77eda9b12ff0ccf12b4021b7193d71778c0a9.tar.gz linux-stable-50b77eda9b12ff0ccf12b4021b7193d71778c0a9.tar.bz2 linux-stable-50b77eda9b12ff0ccf12b4021b7193d71778c0a9.zip | |
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.c | 50 |
1 files changed, 33 insertions, 17 deletions
diff --git a/drivers/acpi/acpica/dswload.c b/drivers/acpi/acpica/dswload.c index 6de3a99d4cd4..10fc78517843 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); + } } /* |