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X-CSE-ConnectionGUID: rK0J05luQIiH4omPJr7QwQ== X-CSE-MsgGUID: 9SpnEOM0QhiMPqiRIhzhsA== X-IronPort-AV: E=McAfee;i="6800,10657,11765"; a="77956977" X-IronPort-AV: E=Sophos;i="6.23,195,1770624000"; d="scan'208";a="77956977" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Apr 2026 09:58:20 -0700 X-CSE-ConnectionGUID: dFgSswiGQz+lQQ7eB1fiAA== X-CSE-MsgGUID: 63T0VxboQ5q1aPr/me1/Qw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,195,1770624000"; d="scan'208";a="256012968" Received: from aduenasd-mobl5.amr.corp.intel.com (HELO [10.125.108.10]) ([10.125.108.10]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Apr 2026 09:58:19 -0700 Message-ID: <4ba58672-e771-4810-a639-b52a239c190c@intel.com> Date: Thu, 23 Apr 2026 09:58:12 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] x86/bug: Add printf() validation to HAVE_ARCH_BUG_FORMAT_ARGS WARNs To: Sean Christopherson Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, linux-kernel@vger.kernel.org, Yan Zhao , Peter Zijlstra References: <20260423145419.459988-1-seanjc@google.com> <20260423145419.459988-2-seanjc@google.com> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 4/23/26 08:47, Sean Christopherson wrote: >> Also, what do you mean about 64-bit-only code? > 32-bit x86 doesn't support HAVE_ARCH_BUG_FORMAT_ARGS, and so it too uses generic > implementations that provide printk validation. I.e. the blind spot is code that > is strictly x86-64, because code that builds on other architectures and on 32-bit > x86 will be detected by those other builds, and unlike CONFIG_BUG=n, people and > bots regularly test those configurations. Ahhh, thanks for the explanation. In any case: Acked-by: Dave Hansen I'll plan to suck these in after -rc1 if someone else doesn't beat me to it.