diff options
Diffstat (limited to 'drivers/acpi/acpica/utdelete.c')
| -rw-r--r-- | drivers/acpi/acpica/utdelete.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c index c07d2227ea42..a3516de213fa 100644 --- a/drivers/acpi/acpica/utdelete.c +++ b/drivers/acpi/acpica/utdelete.c @@ -5,7 +5,7 @@ ******************************************************************************/ /* - * Copyright (C) 2000 - 2013, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -75,6 +75,7 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) union acpi_operand_object *handler_desc; union acpi_operand_object *second_desc; union acpi_operand_object *next_desc; + union acpi_operand_object *start_desc; union acpi_operand_object **last_obj_ptr; ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); @@ -235,10 +236,11 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) if (handler_desc) { next_desc = handler_desc->address_space.region_list; + start_desc = next_desc; last_obj_ptr = &handler_desc->address_space.region_list; - /* Remove the region object from the handler's list */ + /* Remove the region object from the handler list */ while (next_desc) { if (next_desc == object) { @@ -247,10 +249,19 @@ static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) break; } - /* Walk the linked list of handler */ + /* Walk the linked list of handlers */ last_obj_ptr = &next_desc->region.next; next_desc = next_desc->region.next; + + /* Prevent infinite loop if list is corrupted */ + + if (next_desc == start_desc) { + ACPI_ERROR((AE_INFO, + "Circular region list in address handler object %p", + handler_desc)); + return_VOID; + } } if (handler_desc->address_space.handler_flags & |