diff options
| author | Bob Moore <robert.moore@intel.com> | 2008-04-10 19:06:39 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-04-22 14:29:25 -0400 |
| commit | 98af37fba9b3e601ca4bded51ef51a2be4e8c97b (patch) | |
| tree | 8a162d4b1950935570081f59e500086795362558 /drivers/acpi | |
| parent | a13b8460c5b43a68192b599ce437168cc2ff04de (diff) | |
| download | linux-98af37fba9b3e601ca4bded51ef51a2be4e8c97b.tar.gz | |
ACPICA: Add a table checksum verify for Load operator
Added a table checksum verification for the Load operator, in the case where the load is from a buffer. http://www.acpica.org/bugzilla/show_bug.cgi?id=578 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/executer/exconfig.c | 24 | ||||
| -rw-r--r-- | drivers/acpi/tables/tbutils.c | 2 |
2 files changed, 22 insertions, 4 deletions
diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c index a0f34b467a22..dbf1e6f33bba 100644 --- a/drivers/acpi/executer/exconfig.c +++ b/drivers/acpi/executer/exconfig.c @@ -275,6 +275,7 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc, struct acpi_table_desc table_desc; acpi_native_uint table_index; acpi_status status; + u32 length; ACPI_FUNCTION_TRACE(ex_load_op); @@ -322,18 +323,35 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc, "Load from Buffer or Field %p %s\n", obj_desc, acpi_ut_get_object_type_name(obj_desc))); + length = obj_desc->buffer.length; + + /* Must have at least an ACPI table header */ + + if (length < sizeof(struct acpi_table_header)) { + return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); + } + + /* Validate checksum here. It won't get validated in tb_add_table */ + + status = acpi_tb_verify_checksum((struct acpi_table_header *) + obj_desc->buffer.pointer, + length); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + /* * We need to copy the buffer since the original buffer could be * changed or deleted in the future */ - table_desc.pointer = ACPI_ALLOCATE(obj_desc->buffer.length); + table_desc.pointer = ACPI_ALLOCATE(length); if (!table_desc.pointer) { return_ACPI_STATUS(AE_NO_MEMORY); } ACPI_MEMCPY(table_desc.pointer, obj_desc->buffer.pointer, - obj_desc->buffer.length); - table_desc.length = obj_desc->buffer.length; + length); + table_desc.length = length; table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED; break; diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c index 010f19652f80..d04442fc4955 100644 --- a/drivers/acpi/tables/tbutils.c +++ b/drivers/acpi/tables/tbutils.c @@ -212,7 +212,7 @@ acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) if (checksum) { ACPI_WARNING((AE_INFO, - "Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X", + "Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X", table->signature, table->checksum, (u8) (table->checksum - checksum))); |