From patchwork Wed Oct 18 10:50:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Michael_Wei=C3=9F?= X-Patchwork-Id: 13426849 X-Patchwork-Delegate: bpf@iogearbox.net Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 3EFEF11717; Wed, 18 Oct 2023 10:51:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45F30F9; Wed, 18 Oct 2023 03:51:27 -0700 (PDT) Received: from weisslap.aisec.fraunhofer.de ([91.67.186.133]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MfL5v-1rTTgR3Mkt-00grKp; Wed, 18 Oct 2023 12:51:04 +0200 From: =?utf-8?q?Michael_Wei=C3=9F?= To: Alexander Mikhalitsyn , Christian Brauner , Alexei Starovoitov , Paul Moore Cc: Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Quentin Monnet , Alexander Viro , Miklos Szeredi , Amir Goldstein , "Serge E. Hallyn" , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, gyroidos@aisec.fraunhofer.de, =?utf-8?q?Mich?= =?utf-8?q?ael_Wei=C3=9F?= Subject: [RFC PATCH v2 12/14] bpf: Add flag BPF_DEVCG_ACC_MKNOD_UNS for device access Date: Wed, 18 Oct 2023 12:50:31 +0200 Message-Id: <20231018105033.13669-13-michael.weiss@aisec.fraunhofer.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20231018105033.13669-1-michael.weiss@aisec.fraunhofer.de> References: <20231018105033.13669-1-michael.weiss@aisec.fraunhofer.de> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:jFFIwS4qwpApd71uT5/zzBofJHrQqQbMnQCJHEMIWW1Lqc23Bv6 CLaXIgZryPTHHNnoyvu1YqBoKOYSFhL+2PrXRkZWBsk2opEc0nVBAFlgDl0hobyxG49s0Ud 9YG/8xesCxM8FUqNmbqiQ6caI/0dbJYKNpvwSg28bF8XMhCPg66tLPMklXLhksz8jbOX5Be XCthwxUiwm541vxbY+hXA== UI-OutboundReport: notjunk:1;M01:P0:MNEgPA54IMs=;me9EvLyitsl0wTv0UsXt+4LxB3G Eh0yoMuL7/IahwR85VE3A2qEg6zChPO0GZuzIR1zs5Jg9SQnajBFHzvj7/g7SVxDbaGwPtDbu F7Hh5GIa0i+RmWI2OzLgXPGBCqe1A7h2DTWlvI0zAdlwwinvGaZhoqZ/NaZcM7ktbEvFazgys +ivqxBeoHVCwclRyx88ZiwSpRjr7SNnUbuRV/dqHyTy5KHLL7dNamTRD92l9Xvpsu5E1MmTA8 c9ethuj7kCZbBt3Hso5+dXjLc5K+xJp9sV9uJhSh9jYzP5ZxTSygD/VTo6gjBfUO/QqwHgDiz DN2b3nPQ/Ka+xDOyXiogyMb+RiDo5eN28l7YLzEZPZvOIlPKyR1gniVBBmHIN1hGqPnHaSUmq b096EXkbEEbEKE+sSxGYr8MAb8Xjc/tEqzIIQ8yAW1iJquYM1rZGrICDCSHwkSblINPpsfULD OdI1QFuBmuuSEYvCwaFLYlELH/MEGqntz5GEbi2VrFAQs7RNDTYrKHHwz0V3HECnp0MHGCyla iIDYh6MStky1f2Z112vlezC18zvZI7y5xmNfx4rMXFvaPoYgP1J5I4aBxDVhvdBZVUpQ/9WWq WCQSyKBPIt7tOt1AM4T9pEtbme68dVzHEj00Wu0WrfYAA9EttXA75nqVYaJNdFdSkaklL6sqq OMnVc+K/LfD5LpC5oMG9OB3Jl4ELffgkabBtNhPqXE3IZDE5g0pkAdhiM75yPFDKgXL+KleWt IMJuv7bdK+xSGELVf0mabwDYZ+t2hJx2tfHTDauWnBOqCEULvpciMaMv2o/ulUR7MMl/umNkW YpMPYmf7O+6hjzc9yOYOXJEHoSp2/IbkkvZhSkf2YDawB4xecEGdSdap2eMAwzEW6v+VOUjNx E6VXNm2pv7kGcVsIISJwHqEvFCyj8YoVj7KA= X-Spam-Status: No, score=-1.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_SOFTFAIL autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC With this new flag for bpf cgroup device programs, it should be possible to guard mknod() access in non-initial user namespaces later on. Signed-off-by: Michael Weiß --- include/uapi/linux/bpf.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 0448700890f7..0196b9c72d3e 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -6927,6 +6927,7 @@ enum { BPF_DEVCG_ACC_MKNOD = (1ULL << 0), BPF_DEVCG_ACC_READ = (1ULL << 1), BPF_DEVCG_ACC_WRITE = (1ULL << 2), + BPF_DEVCG_ACC_MKNOD_UNS = (1ULL << 3), }; enum {