On Fri, Jan 27, 2023 at 07:08:39PM +0100, Rafael J. Wysocki wrote: > On Fri, Jan 20, 2023 at 8:16 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > > > On Fri, Jan 20, 2023 at 07:10:52PM +0100, Rafael J. Wysocki wrote: > > > On Sun, Jan 15, 2023 at 7:38 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > > > > > > > On Fri, Nov 18, 2022 at 10:15:51AM -0800, Kees Cook wrote: > > > > > Functionally identical to ACPICA upstream pull request 813: > > > > > https://github.com/acpica/acpica/pull/813 > > > > > > > > Any update on this? Upstream is currently unbuildable since October. > > > > > > > > > One-element arrays (and multi-element arrays being treated as > > > > > dynamically sized) are deprecated[1] and are being replaced with > > > > > flexible array members in support of the ongoing efforts to tighten the > > > > > FORTIFY_SOURCE routines on memcpy(), correctly instrument array indexing > > > > > with UBSAN_BOUNDS, and to globally enable -fstrict-flex-arrays=3. > > > > > > > > > > Replace one-element array with flexible-array member in struct > > > > > acpi_resource_extended_irq. Replace 4-byte fixed-size array with 4-byte > > > > > padding in a union with a flexible-array member in struct > > > > > acpi_pci_routing_table. > > > > > > > > > > This results in no differences in binary output. > > > > > > > > In the meantime, can you take this patch for Linux, and we can wait for > > > > ACPICA to catch up? > > > > > > Applied now (as 6.3 material), sorry for the delay. > > > > Thanks! > > Unfortunately, this breaks compilation for the ACPI tools in tools/power/acpi/. What's the make target to test this? > Apparently, the problem is that DECLARE_FLEX_ARRAY() is not defined > when the tools are built, because kernel headers are not used then. This should exist in the stddef.h tools headers, but perhaps it isn't included already? > I guess the changes from your upstream PR need to be backported > literally for this to work, so I'll drop this one for the time being. > Or please let me know if you have a better idea. I can send a new version if I can reproduce the build failure you see... -- Kees Cook
