From: Andrii Nakryiko <andrii@kernel.org>
To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>
Cc: <linux-fsdevel@vger.kernel.org>,
<linux-security-module@vger.kernel.org>, <keescook@chromium.org>,
<brauner@kernel.org>, <lennart@poettering.net>,
<kernel-team@meta.com>, <sargun@sargun.me>
Subject: [PATCH v7 bpf-next 18/18] bpf,selinux: allocate bpf_security_struct per BPF token
Date: Thu, 12 Oct 2023 15:28:10 -0700 [thread overview]
Message-ID: <20231012222810.4120312-19-andrii@kernel.org> (raw)
In-Reply-To: <20231012222810.4120312-1-andrii@kernel.org>
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 <andrii@kernel.org>
---
security/selinux/hooks.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 3d5dea4f1df0..acd84839ae2c 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
prev parent reply other threads:[~2023-10-12 22:32 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-12 22:27 [PATCH v7 bpf-next 00/18] BPF token and BPF FS-based delegation Andrii Nakryiko
2023-10-12 22:27 ` [PATCH v7 bpf-next 01/18] bpf: align CAP_NET_ADMIN checks with bpf_capable() approach Andrii Nakryiko
2023-10-12 22:27 ` [PATCH v7 bpf-next 02/18] bpf: add BPF token delegation mount options to BPF FS Andrii Nakryiko
2023-10-12 22:27 ` [PATCH v7 bpf-next 03/18] bpf: introduce BPF token object Andrii Nakryiko
2023-10-12 22:27 ` [PATCH v7 bpf-next 04/18] bpf: add BPF token support to BPF_MAP_CREATE command Andrii Nakryiko
2023-10-12 22:27 ` [PATCH v7 bpf-next 05/18] bpf: add BPF token support to BPF_BTF_LOAD command Andrii Nakryiko
2023-10-12 22:27 ` [PATCH v7 bpf-next 06/18] bpf: add BPF token support to BPF_PROG_LOAD command Andrii Nakryiko
2023-10-13 21:15 ` [PATCH v7 6/18] " Paul Moore
2023-10-13 21:55 ` Andrii Nakryiko
2023-10-12 22:27 ` [PATCH v7 bpf-next 07/18] bpf: take into account BPF token when fetching helper protos Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 08/18] bpf: consistenly use BPF token throughout BPF verifier logic Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 09/18] bpf,lsm: refactor bpf_prog_alloc/bpf_prog_free LSM hooks Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 10/18] bpf,lsm: refactor bpf_map_alloc/bpf_map_free " Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 11/18] bpf,lsm: add bpf_token_create and bpf_token_free " Andrii Nakryiko
2023-10-13 21:15 ` [PATCH v7 " Paul Moore
2023-10-13 21:55 ` Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 12/18] libbpf: add bpf_token_create() API Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 13/18] selftests/bpf: fix test_maps' use of bpf_map_create_opts Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 14/18] libbpf: add BPF token support to bpf_map_create() API Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 15/18] libbpf: add BPF token support to bpf_btf_load() API Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 16/18] libbpf: add BPF token support to bpf_prog_load() API Andrii Nakryiko
2023-10-12 22:28 ` [PATCH v7 bpf-next 17/18] selftests/bpf: add BPF token-enabled tests Andrii Nakryiko
2023-10-12 22:28 ` Andrii Nakryiko [this message]
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