From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx2.zhaoxin.com (mx2.zhaoxin.com [203.110.167.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5BA1918F2DD for ; Wed, 5 Jun 2024 10:10:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.110.167.99 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717582221; cv=none; b=k/huHZHZc2gnj7TalcGVjT9TPVkyoDwBO2GOgmhH9WwLSSspoZJ181KuClVVx78OmLZryBDGjYddplBdkCH4L6zrI+B5YqZKtEsZfyKNdc71Kqgc0TEIRXD0+LoCTTGV1aQPyAHbzW2MlzjDOqacs/CewCD3nhDT4tj5+I1TR+g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717582221; c=relaxed/simple; bh=fVQ3gKsSZ0BLacCQBHTlcfS1c3uGora/qFnnJ7KFIeo=; h=Message-ID:Date:MIME-Version:Subject:To:CC:References:From: In-Reply-To:Content-Type; b=NHUtn2O37xTQ8CUZmhOWY+gwphkSNnkxjjSiIM/ab6C8O5wiGHI1uVojPd6AOyhDcF8p0o1AFDOpPtiXe6ggzevt1L0+OnTt32I2XInMBvtqPzA5f+0kGMnLUbXz3qGbR5CoIb8ZEZa1yRwt6AC9lDLFRPAxHZUFuYNPhXkHIls= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=zhaoxin.com; spf=pass smtp.mailfrom=zhaoxin.com; arc=none smtp.client-ip=203.110.167.99 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=zhaoxin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zhaoxin.com X-ASG-Debug-ID: 1717582214-1eb14e157618e10001-PleebU Received: from ZXSHMBX1.zhaoxin.com (ZXSHMBX1.zhaoxin.com [10.28.252.163]) by mx2.zhaoxin.com with ESMTP id FDQEw4sX2G90oY6Z (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO); Wed, 05 Jun 2024 18:10:14 +0800 (CST) X-Barracuda-Envelope-From: TonyWWang-oc@zhaoxin.com X-Barracuda-RBL-Trusted-Forwarder: 10.28.252.163 Received: from ZXBJMBX03.zhaoxin.com (10.29.252.7) by ZXSHMBX1.zhaoxin.com (10.28.252.163) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Wed, 5 Jun 2024 18:10:14 +0800 Received: from [10.32.65.162] (10.32.65.162) by ZXBJMBX03.zhaoxin.com (10.29.252.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.27; Wed, 5 Jun 2024 18:10:12 +0800 X-Barracuda-RBL-Trusted-Forwarder: 10.28.252.163 Message-ID: X-Barracuda-RBL-Trusted-Forwarder: 10.32.65.162 Date: Wed, 5 Jun 2024 18:10:07 +0800 Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] x86/hpet: Read HPET directly if panic in progress To: Borislav Petkov X-ASG-Orig-Subj: Re: [PATCH] x86/hpet: Read HPET directly if panic in progress CC: Thomas Gleixner , Linus Torvalds , Dave Hansen , , , , , , , , , , , , , , , , , , , References: <20240528063836.5248-1-TonyWWang-oc@zhaoxin.com> <50fc1bd3-909e-41c4-a991-9d81e32ef92c@intel.com> <87wmnda8mc.ffs@tglx> <87le3t9i8c.ffs@tglx> <0aff3f62-a8a5-4358-ae3f-2ded339aface@zhaoxin.com> <20240605093609.GCZmAxidNIBP5bkDcX@fat_crate.local> Content-Language: en-US From: Tony W Wang-oc In-Reply-To: <20240605093609.GCZmAxidNIBP5bkDcX@fat_crate.local> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: ZXSHCAS2.zhaoxin.com (10.28.252.162) To ZXBJMBX03.zhaoxin.com (10.29.252.7) X-Barracuda-Connect: ZXSHMBX1.zhaoxin.com[10.28.252.163] X-Barracuda-Start-Time: 1717582214 X-Barracuda-Encrypted: ECDHE-RSA-AES128-GCM-SHA256 X-Barracuda-URL: https://10.28.252.36:4443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at zhaoxin.com X-Barracuda-Scan-Msg-Size: 677 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=9.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.125827 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- On 2024/6/5 17:36, Borislav Petkov wrote: > > > [这封邮件来自外部发件人 谨防风险] > > On Wed, Jun 05, 2024 at 02:23:32PM +0800, Tony W Wang-oc wrote: >> After MCE has occurred, it is possible for the MCE handler to execute the >> add_taint() function without panic. For example, the fake_panic is >> configured. > > fake_panic is an ancient debugging leftover. If you set it, you get what > you deserve. > It may also happen without setting fake_panic, such as an MCE error of the UCNA/SRAO type occurred? Sincerely TonyWWang-oc > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette