linux-hardening - Re: [PATCH] ACPICA: Replace fake flexible arrays with flexible array members

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 20 Jan 2023 11:16:36 -0800
From:   Kees Cook <keescook@...omium.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Len Brown <lenb@...nel.org>, Robert Moore <robert.moore@...el.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org,
        acpica-devel@...ts.linuxfoundation.org
Subject: Re: [PATCH] ACPICA: Replace fake flexible arrays with flexible array
 members

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@...omium.org> 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!

-- 
Kees Cook