From mboxrd@z Thu Jan 1 00:00:00 1970 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 700B22510F for ; Fri, 3 Nov 2023 19:06:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from mx0a-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25012D47 for ; Fri, 3 Nov 2023 12:06:12 -0700 (PDT) Received: from pps.filterd (m0089730.ppops.net [127.0.0.1]) by m0089730.ppops.net (8.17.1.19/8.17.1.19) with ESMTP id 3A3J2arG003801 for ; Fri, 3 Nov 2023 12:06:11 -0700 Received: from maileast.thefacebook.com ([163.114.130.16]) by m0089730.ppops.net (PPS) with ESMTPS id 3u4twdmpwp-18 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 03 Nov 2023 12:06:11 -0700 Received: from twshared29647.38.frc1.facebook.com (2620:10d:c0a8:1c::1b) by mail.thefacebook.com (2620:10d:c0a8:82::b) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.34; Fri, 3 Nov 2023 12:06:08 -0700 Received: by devbig019.vll3.facebook.com (Postfix, from userid 137359) id 3E90C3AE384D7; Fri, 3 Nov 2023 12:06:00 -0700 (PDT) From: Andrii Nakryiko To: , , , CC: , , , , Subject: [PATCH v9 bpf-next 17/17] bpf,selinux: allocate bpf_security_struct per BPF token Date: Fri, 3 Nov 2023 12:05:23 -0700 Message-ID: <20231103190523.6353-18-andrii@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231103190523.6353-1-andrii@kernel.org> References: <20231103190523.6353-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: OWJp8T-iK7cXGaRy-fXupInXK6NLCKiW X-Proofpoint-ORIG-GUID: OWJp8T-iK7cXGaRy-fXupInXK6NLCKiW 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=2023-11-03_18,2023-11-02_03,2023-05-22_02 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 =3D NULL; kfree(bpfsec); } + +static int selinux_bpf_token_create(struct bpf_token *token, union bpf_a= ttr *attr, + struct path *path) +{ + struct bpf_security_struct *bpfsec; + + bpfsec =3D kzalloc(sizeof(*bpfsec), GFP_KERNEL); + if (!bpfsec) + return -ENOMEM; + + bpfsec->sid =3D current_sid(); + token->security =3D bpfsec; + + return 0; +} + +static void selinux_bpf_token_free(struct bpf_token *token) +{ + struct bpf_security_struct *bpfsec =3D token->security; + + token->security =3D NULL; + kfree(bpfsec); +} #endif =20 struct lsm_blob_sizes selinux_blob_sizes __ro_after_init =3D { @@ -7183,6 +7206,7 @@ static struct security_hook_list selinux_hooks[] __= ro_after_init =3D { 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 =20 #ifdef CONFIG_PERF_EVENTS @@ -7241,6 +7265,7 @@ static struct security_hook_list selinux_hooks[] __= ro_after_init =3D { #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), --=20 2.34.1