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>
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2 changed files with 22 additions and 4 deletions
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@ -275,6 +275,7 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
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struct acpi_table_desc table_desc;
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acpi_native_uint table_index;
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acpi_status status;
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u32 length;
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ACPI_FUNCTION_TRACE(ex_load_op);
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@ -322,18 +323,35 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
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"Load from Buffer or Field %p %s\n", obj_desc,
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acpi_ut_get_object_type_name(obj_desc)));
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length = obj_desc->buffer.length;
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/* Must have at least an ACPI table header */
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if (length < sizeof(struct acpi_table_header)) {
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return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
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}
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/* Validate checksum here. It won't get validated in tb_add_table */
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status = acpi_tb_verify_checksum((struct acpi_table_header *)
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obj_desc->buffer.pointer,
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length);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* We need to copy the buffer since the original buffer could be
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* changed or deleted in the future
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*/
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table_desc.pointer = ACPI_ALLOCATE(obj_desc->buffer.length);
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table_desc.pointer = ACPI_ALLOCATE(length);
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if (!table_desc.pointer) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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ACPI_MEMCPY(table_desc.pointer, obj_desc->buffer.pointer,
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obj_desc->buffer.length);
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table_desc.length = obj_desc->buffer.length;
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length);
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table_desc.length = length;
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table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
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break;
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