linux-hardening - Re: [PATCH 1/2] Compiler Attributes: Add __counted_by

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Message-Id: <a4c3494c-5444-4cc5-b847-4e1754bf3d20@app.fastmail.com>
Date: Tue, 10 Feb 2026 12:28:06 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Bill Wendling" <morbo@...gle.com>
Cc: linux-kernel@...r.kernel.org, "Kees Cook" <kees@...nel.org>,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>,
 "Nathan Chancellor" <nathan@...nel.org>,
 "Nick Desaulniers" <nick.desaulniers+lkml@...il.com>,
 "Justin Stitt" <justinstitt@...gle.com>,
 "Miguel Ojeda" <ojeda@...nel.org>,
 "Peter Zijlstra" <peterz@...radead.org>,
 "Andrew Morton" <akpm@...ux-foundation.org>,
 "Heiko Carstens" <hca@...ux.ibm.com>,
 "Marc Herbert" <Marc.Herbert@...ux.intel.com>,
 "Uros Bizjak" <ubizjak@...il.com>, "Tejun Heo" <tj@...nel.org>,
 "Jeff Xu" <jeffxu@...omium.org>,
 Michal Koutný <mkoutny@...e.com>,
 "Shakeel Butt" <shakeel.butt@...ux.dev>,
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
 "John Stultz" <jstultz@...gle.com>,
 "Christian Brauner" <brauner@...nel.org>,
 "Randy Dunlap" <rdunlap@...radead.org>,
 "Brian Gerst" <brgerst@...il.com>,
 "Masahiro Yamada" <masahiroy@...nel.org>,
 linux-hardening@...r.kernel.org, llvm@...ts.linux.dev,
 "Jan Hendrik Farr" <kernel@...rr.cc>
Subject: Re: [PATCH 1/2] Compiler Attributes: Add __counted_by_ptr macro

On Tue, Feb 10, 2026, at 12:00, Bill Wendling wrote:
> On Tue, Feb 10, 2026 at 12:41 AM Arnd Bergmann <arnd@...db.de> wrote:
>>
>> This is every use of __counted_by_ptr() in linux-next at the moment.
>>
> I assume it's a git snapshot of GCC. :-) What does
> `scripts/cc-version.sh` produce for it?

It shows 'GCC 160000'

I see my mistake now, I tried to build the lastest snapshot
but accidentally checked out an older git commit on that
branch, which didn't work.

I retested with current HEAD now, and that does work.

Sorry for the confusion.

     Arnd