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{ "id": 2231788, "url": "http://patchwork.ozlabs.org/api/1.2/covers/2231788/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/177763771233.374359.17873278509696979439@gollum.public/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/1.2/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<177763771233.374359.17873278509696979439@gollum.public>", "list_archive_url": null, "date": "2026-05-01T12:29:58", "name": "[SRU,R:raspi/Q:raspi/N:raspi,0/3] CONFIG_BPF_LSM not enabled in linux-raspi arm64 kernel (LP: #2150798)", "submitter": { "id": 71819, "url": "http://patchwork.ozlabs.org/api/1.2/people/71819/?format=api", "name": "Juerg Haefliger", "email": "juerg.haefliger@canonical.com" }, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/177763771233.374359.17873278509696979439@gollum.public/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/covers/2231788/comments/", "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=FgunQM6+;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "BugLink: https://bugs.launchpad.net/bugs/2150798\n\n[ Impact ]\n\nThe linux-raspi kernel flavor on Ubuntu 24.04 (Noble) arm64 does not have\nCONFIG_BPF_LSM enabled, while linux-image-generic arm64 does. This prevents\nRaspberry Pi users from using BPF LSM programs for security enforcement, even\nvia the lsm= boot parameter.\n\nThe raspi config annotations in Noble explicitly override the parent kernel's\nsetting:\n\n CONFIG_BPF_LSM policy<{'arm64': 'n'}> note<'Different from master'>\n\nAdditionally, the 26.04 (Resolute) linux-raspi changelog for 7.0.0-1009 includes\n\"[Config] Enable CONFIG_BPF_LSM\", but debian.raspi/config/config.common.ubuntu\nstill contains \"# CONFIG_BPF_LSM is not set\". This appears to be an incomplete\nrollout of the intended change.\n\n\n[ Test Case ]\n\n$ grep CONFIG_BPF_LSM /boot/config-$(uname -r)\nCONFIG_BPF_LSM=y\n\n\n[ Where Problems Could Occur ]\n\nTurning this on doesn't do anything by itself but badly written hooks can bring down the system." }