From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (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 EECDC82C60; Wed, 5 Mar 2025 02:08:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741140515; cv=none; b=QrjXtlQHsgs7R4JRUlYJ/rnGryMVqgneT1Km6U2YEo4ds2gfC/ImSJWJgowmYjO9ouLN81dh1bsBZrGlVUqY8BlQR2Ak8yUV8BZN1lkkWCxMMVNYi1jc/2u+mhMwbZvrvTDvRGrWkRqpM17gmNOJDvxxiQ+oE7cpXZwhBPD9l0M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741140515; c=relaxed/simple; bh=2qaY55EbUClEFWlHR/dlU8zjvd4SCa1PdEWwBvUXdWA=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=u31r+HCxtIw2+J+Y2aNxj5Lf2dnQwRPHI4yjuIWiz5HkvQGP5p3uWfEfD/Ml4psegXwJI+R0LTC2esjkfNTn4EVqUnm7FpDTa+XiUHmzRBcfPVaaTfRXWSCpQ/JN4BFO6OErPkFsD4qLX/r2VZxj1n9DkMQAFsxiyud7/XH1pnY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=gIC32lJS; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="gIC32lJS" Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 524KchQO014502; Wed, 5 Mar 2025 02:08:03 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=8zXsNO fgaDdCDO14Py7QD/hmFwzYTQByJPaKXkUaR6Q=; b=gIC32lJSVEyLINqvFLXLRa uI/NC1wwUV3+nliKUOQm72wVa3WKDJuaNnH9hAtKXR6N3gOe6oq+sJCgok3Rg3Xy P+MtaFW3lcVdQyDASoXnYBEpzItyCjRr+qnD9OYJ4ANOOQb08JAZOJM65uXHzkZo gRvu7iIw4qzJDC8cLJih7taCx0Vw34hJJBd9i0mU72IXHfymyM5f2+XixCHlEZeo 5ddSk80Lxz+A4nt7j63DJtM1hXuwVI0X1OKKiCNv4P4zlbjwdZ9/hCMlsVNt3qHp 9Y1y0pQtsGLfx928uVVRTJ/5RsgNoithOiZleWgx9gJ6WmkugCVC3dNix59lS9Qg == Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4568r0h0px-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 05 Mar 2025 02:08:03 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 524NZWpa013743; Wed, 5 Mar 2025 02:08:02 GMT Received: from smtprelay04.wdc07v.mail.ibm.com ([172.16.1.71]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 454e2krdvk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 05 Mar 2025 02:08:02 +0000 Received: from smtpav03.dal12v.mail.ibm.com (smtpav03.dal12v.mail.ibm.com [10.241.53.102]) by smtprelay04.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 525282Us48824582 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 5 Mar 2025 02:08:02 GMT Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EF4CD58056; Wed, 5 Mar 2025 02:08:01 +0000 (GMT) Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DD72F5803F; Wed, 5 Mar 2025 02:08:00 +0000 (GMT) Received: from li-43857255-d5e6-4659-90f1-fc5cee4750ad.ibm.com (unknown [9.61.117.76]) by smtpav03.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 5 Mar 2025 02:08:00 +0000 (GMT) Message-ID: <3aadae5d35af3f984b9e8bc548d73bb878d666bd.camel@linux.ibm.com> Subject: Re: [PATCH v9 1/7] ima: copy only complete measurement records across kexec From: Mimi Zohar To: steven chen , stefanb@linux.ibm.com, roberto.sassu@huaweicloud.com, roberto.sassu@huawei.com, eric.snowberg@oracle.com, ebiederm@xmission.com, paul@paul-moore.com, code@tyhicks.com, bauermann@kolabnow.com, linux-integrity@vger.kernel.org, kexec@lists.infradead.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org Cc: madvenka@linux.microsoft.com, nramas@linux.microsoft.com, James.Bottomley@HansenPartnership.com, bhe@redhat.com, vgoyal@redhat.com, dyoung@redhat.com Date: Tue, 04 Mar 2025 21:08:00 -0500 In-Reply-To: <20250304190351.96975-2-chenste@linux.microsoft.com> References: <20250304190351.96975-1-chenste@linux.microsoft.com> <20250304190351.96975-2-chenste@linux.microsoft.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.4 (3.52.4-2.fc40) Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: CAoPRjNKVmPFluf5VdmaD1zxNex0Mc7D X-Proofpoint-ORIG-GUID: CAoPRjNKVmPFluf5VdmaD1zxNex0Mc7D X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-05_01,2025-03-04_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=983 suspectscore=0 impostorscore=0 priorityscore=1501 bulkscore=0 spamscore=0 mlxscore=0 phishscore=0 clxscore=1015 adultscore=0 lowpriorityscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503050013 On Tue, 2025-03-04 at 11:03 -0800, steven chen wrote: >=20 > - Compared the memory size allocated with memory size of the entire=20 > measurement record. Copy only complete measurement records if there= =20 > is enough memory. If there is not enough memory, it will not copy > any IMA measurement records, and this situation will result in a=20 > failure of remote attestation. In discussions with Tushar, I was very clear that as many measurement recor= ds as possible should be carried over to the kexec'ed kernel. The main change be= tween v8 and v9 was to make sure the last record copied was a complete record. Mimi