From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66568C4167D for ; Fri, 10 Nov 2023 03:49:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345901AbjKJDtl convert rfc822-to-8bit (ORCPT ); Thu, 9 Nov 2023 22:49:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345926AbjKJDtX (ORCPT ); Thu, 9 Nov 2023 22:49:23 -0500 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC91B46A3 for ; Thu, 9 Nov 2023 19:49:20 -0800 (PST) Received: from pps.filterd (m0148461.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3A9MYvSF018927 for ; Thu, 9 Nov 2023 19:49:20 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3u8xr3pwcn-12 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 09 Nov 2023 19:49:20 -0800 Received: from twshared11278.41.prn1.facebook.com (2620:10d:c085:208::11) by mail.thefacebook.com (2620:10d:c085:11d::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.34; Thu, 9 Nov 2023 19:49:16 -0800 Received: by devbig019.vll3.facebook.com (Postfix, from userid 137359) id 747713B41DCBB; Thu, 9 Nov 2023 19:49:13 -0800 (PST) From: Andrii Nakryiko To: , , , CC: , , , , Subject: [PATCH v10 bpf-next 17/17] bpf,selinux: allocate bpf_security_struct per BPF token Date: Thu, 9 Nov 2023 19:48:38 -0800 Message-ID: <20231110034838.1295764-18-andrii@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231110034838.1295764-1-andrii@kernel.org> References: <20231110034838.1295764-1-andrii@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: 5l6pwFDPXFiBhc9cyPNWbkY2uan3Gagn X-Proofpoint-ORIG-GUID: 5l6pwFDPXFiBhc9cyPNWbkY2uan3Gagn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-09_17,2023-11-09_01,2023-05-22_02 Precedence: bulk List-ID: Utilize newly added bpf_token_create/bpf_token_free LSM hooks to allocate struct bpf_security_struct for each BPF token object in SELinux. This just follows similar pattern for BPF prog and map. Signed-off-by: Andrii Nakryiko --- security/selinux/hooks.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 002351ab67b7..1501e95366a1 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -6828,6 +6828,29 @@ static void selinux_bpf_prog_free(struct bpf_prog *prog) prog->aux->security = NULL; kfree(bpfsec); } + +static int selinux_bpf_token_create(struct bpf_token *token, union bpf_attr *attr, + struct path *path) +{ + struct bpf_security_struct *bpfsec; + + bpfsec = kzalloc(sizeof(*bpfsec), GFP_KERNEL); + if (!bpfsec) + return -ENOMEM; + + bpfsec->sid = current_sid(); + token->security = bpfsec; + + return 0; +} + +static void selinux_bpf_token_free(struct bpf_token *token) +{ + struct bpf_security_struct *bpfsec = token->security; + + token->security = NULL; + kfree(bpfsec); +} #endif struct lsm_blob_sizes selinux_blob_sizes __ro_after_init = { @@ -7183,6 +7206,7 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { LSM_HOOK_INIT(bpf_prog, selinux_bpf_prog), LSM_HOOK_INIT(bpf_map_free, selinux_bpf_map_free), LSM_HOOK_INIT(bpf_prog_free, selinux_bpf_prog_free), + LSM_HOOK_INIT(bpf_token_free, selinux_bpf_token_free), #endif #ifdef CONFIG_PERF_EVENTS @@ -7241,6 +7265,7 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { #ifdef CONFIG_BPF_SYSCALL LSM_HOOK_INIT(bpf_map_create, selinux_bpf_map_create), LSM_HOOK_INIT(bpf_prog_load, selinux_bpf_prog_load), + LSM_HOOK_INIT(bpf_token_create, selinux_bpf_token_create), #endif #ifdef CONFIG_PERF_EVENTS LSM_HOOK_INIT(perf_event_alloc, selinux_perf_event_alloc), -- 2.34.1