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Wed, 14 May 2025 12:40:40 +0000 (GMT) Message-ID: <47edc9708d0ca75489d59ef4b9b6ef2f5de21fe9.camel@linux.ibm.com> Subject: Re: [PATCH V2] ima: do not copy measurement list to kdump kernel 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 Date: Wed, 14 May 2025 08:40:39 -0400 In-Reply-To: <20250513143129.1165-1-chenste@linux.microsoft.com> References: <20250513143129.1165-1-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) MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=RpTFLDmK c=1 sm=1 tr=0 ts=68248f4b cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=yMhMjlubAAAA:8 a=20KFwNOVAAAA:8 a=1v2mA-L8tnUgDz3cNWsA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: KFtkED7iNBqTTVFsvX40P1QhtKzqui76 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE0MDExMSBTYWx0ZWRfX3pqPk3C/XJkr r3Cjk9ibS4n+GvwREoqEgmdxsP/iKvaO9gdEi9N1YlgFW2RYO95N/kkV18+YylD/9VdR7krRWyc TbcjDMX3p4vP/1tge40WSi0IB1A5Pu2N2kNItezM8WAqnk67Fb+63uNMAtsfEQK1Z/LUxeSTnYA iUA2W0L3idNEBZtMzTsq9lr4YEggrO9HqMqCDniCS6QWG+36DOL+HJ3g4BPW1YvFZvcm6lmVW3s HuAiLjC89URa2AglwefOIGQPr8XvsX0Tl0DajMG8XRqAdHt7YOQaIiDMeLG5qp9MwqFL+WasE/4 FMP42jOupTfaIc+zGMk+DjP//R5H8MJuZNbaUxHPY16ptrrQCLNQkbbCJ34JWO2AOTz+ahqKfRd rqMe7WGWp8FC0FwfmMEq2ScZ7jw128Mt51vRO72sspwFHZKsfdzzzrcqtQP4E5x9W5yf3+vo X-Proofpoint-ORIG-GUID: KFtkED7iNBqTTVFsvX40P1QhtKzqui76 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-14_04,2025-05-14_02,2025-02-21_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 bulkscore=0 mlxlogscore=999 mlxscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 impostorscore=0 priorityscore=1501 adultscore=0 phishscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505140111 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250514_054102_161757_228D5A7C X-CRM114-Status: GOOD ( 12.68 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On Tue, 2025-05-13 at 07:31 -0700, steven chen wrote: > From: Steven Chen >=20 > Kdump kernel doesn't need IMA to do integrity measurement. > Hence the measurement list in 1st kernel doesn't need to be copied to > kdump kernel. >=20 > Here skip allocating buffer for measurement list copying if loading > kdump kernel. Then there won't be the later handling related to > ima_kexec_buffer. >=20 > Signed-off-by: Steven Chen > Tested-by: Baoquan He > Acked-by: Baoquan He Thanks, Boaquan, Steven. This patch is now queued in next-integrity and next-integrity-testing. Mimi