From: Kees Cook <kees@xxxxxxxxxxx> ACPICA commit bfdd3446e7caf795c85c70326c137023942972c5 Similar to "Replace one-element array with flexible-array", replace the 1-element array with a proper flexible array member as defined by C99. This allows the code to operate without tripping compile-time and run- time bounds checkers (e.g. via __builtin_object_size(), -fsanitize=bounds, and/or -fstrict-flex-arrays=3). Note that the spec requires there be at least one interrupt, so use a union to keep space allocated for this. The only binary change in .text and .data sections is some rearrangement by the compiler of acpi_dm_address_common(), but appears to be harmless. Link: https://github.com/acpica/acpica/commit/bfdd3446 Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> --- drivers/acpi/acpica/amlresrc.h | 5 ++++- include/acpi/acrestyp.h | 10 ++++++++-- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/acpica/amlresrc.h b/drivers/acpi/acpica/amlresrc.h index 48df447ef5bb..4e88f9fc2a28 100644 --- a/drivers/acpi/acpica/amlresrc.h +++ b/drivers/acpi/acpica/amlresrc.h @@ -261,7 +261,10 @@ struct aml_resource_address16 { struct aml_resource_extended_irq { AML_RESOURCE_LARGE_HEADER_COMMON u8 flags; u8 interrupt_count; - u32 interrupts[1]; + union { + u32 interrupt; + ACPI_FLEX_ARRAY(u32, interrupts); + }; /* res_source_index, res_source optional fields follow */ }; diff --git a/include/acpi/acrestyp.h b/include/acpi/acrestyp.h index 4c3b7b393f82..b84cd316217f 100644 --- a/include/acpi/acrestyp.h +++ b/include/acpi/acrestyp.h @@ -142,7 +142,10 @@ struct acpi_resource_irq { u8 shareable; u8 wake_capable; u8 interrupt_count; - u8 interrupts[1]; + union { + u8 interrupt; + ACPI_FLEX_ARRAY(u8, interrupts); + }; }; struct acpi_resource_dma { @@ -335,7 +338,10 @@ struct acpi_resource_extended_irq { u8 wake_capable; u8 interrupt_count; struct acpi_resource_source resource_source; - u32 interrupts[1]; + union { + u32 interrupt; + ACPI_FLEX_ARRAY(u32, interrupts); + }; }; struct acpi_resource_generic_register { -- 2.35.3
