linux-kernel - Re: [PATCH 6.1.y] KVM: arm64: silence -Wuninitialized-const-pointer warning

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]

Message-ID: <20250725162654.GA684490@ax162>
Date: Fri, 25 Jul 2025 09:26:54 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Marc Zyngier <maz@...nel.org>
Cc: Justin Stitt <justinstitt@...gle.com>,
	James Morse <james.morse@....com>,
	Alexandru Elisei <alexandru.elisei@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Tom Rix <trix@...hat.com>,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
	stable@...r.kernel.org
Subject: Re: [PATCH 6.1.y] KVM: arm64: silence -Wuninitialized-const-pointer
 warning

On Fri, Jul 25, 2025 at 08:30:21AM +0100, Marc Zyngier wrote:
> The correct fix would be to backport the series described in
> e8789ab7047a8, which should be easy enough to apply. it would also
> make 6.1 less of a terrible kernel.

If doing that is reasonable to clear this up, I think that would be fine
to do. This is the only stable-only instance of that warning that I have
seen in the build logs, I have sent patches to deal with all the other
instances upstream. We would need this in 5.15 to avoid failures from
-Werror as well but if it is too hard to backport that series there, we
could just disable this warning for this file since we know it is a
false positive.

The whole reason the warning occurs is due to the constness of the
sys_reg_desc parameter in the function created by FUNCTION_INVARIANT(),
which I am guessing cannot be removed because it is present in
->access() and it proliferates out from there?

Cheers,
Nathan