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authorLin Ming <ming.m.lin@intel.com>2008-09-27 11:29:57 +0800
committerLen Brown <len.brown@intel.com>2008-10-22 23:14:47 -0400
commitcf058bd1c84df9921ecc517d8a8a413f4d6b5b45 (patch)
treeca9cc1f367f96a13e60047c88a0e41f284274c71 /drivers/acpi
parentc35def2118d3d7cceb0f69d6707f613a7473df15 (diff)
ACPICA: Fix possible memory leak, error exit path
Fixed two possible memory leaks in the error exit paths of acpi_ut_update_objerct_reference() and acpi_ut_walk_package_tree() These functions are similar in that they use a stack of state objects in order to eliminate recursion. The stack must be fully deallocated if an error occurs. http://www.acpica.org/bugzilla/show_bug.cgi?id=383 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/acpi')
-rw-r--r--drivers/acpi/utilities/utdelete.c7
-rw-r--r--drivers/acpi/utilities/utmisc.c9
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/acpi/utilities/utdelete.c b/drivers/acpi/utilities/utdelete.c
index 5c219758c226..d197c6b29e17 100644
--- a/drivers/acpi/utilities/utdelete.c
+++ b/drivers/acpi/utilities/utdelete.c
@@ -585,6 +585,13 @@ acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action)
ACPI_EXCEPTION((AE_INFO, status,
"Could not update object reference count"));
+ /* Free any stacked Update State objects */
+
+ while (state_list) {
+ state = acpi_ut_pop_generic_state(&state_list);
+ acpi_ut_delete_generic_state(state);
+ }
+
return_ACPI_STATUS(status);
}
diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index f34be6773556..9089a158a874 100644
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -995,6 +995,15 @@ acpi_ut_walk_package_tree(union acpi_operand_object * source_object,
state->pkg.
this_target_obj, 0);
if (!state) {
+
+ /* Free any stacked Update State objects */
+
+ while (state_list) {
+ state =
+ acpi_ut_pop_generic_state
+ (&state_list);
+ acpi_ut_delete_generic_state(state);
+ }
return_ACPI_STATUS(AE_NO_MEMORY);
}
}