From: KP Singh <kpsingh@chromium.org>
To: linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
linux-security-module@vger.kernel.org
Cc: "Brendan Jackman" <jackmanb@google.com>,
"Florent Revest" <revest@google.com>,
"Thomas Garnier" <thgarnie@google.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"James Morris" <jmorris@namei.org>,
"Kees Cook" <keescook@chromium.org>,
"Thomas Garnier" <thgarnie@chromium.org>,
"Michael Halcrow" <mhalcrow@google.com>,
"Paul Turner" <pjt@google.com>,
"Brendan Gregg" <brendan.d.gregg@gmail.com>,
"Jann Horn" <jannh@google.com>,
"Matthew Garrett" <mjg59@google.com>,
"Christian Brauner" <christian@brauner.io>,
"Mickaël Salaün" <mic@digikod.net>,
"Florent Revest" <revest@chromium.org>,
"Brendan Jackman" <jackmanb@chromium.org>,
"Martin KaFai Lau" <kafai@fb.com>,
"Song Liu" <songliubraving@fb.com>, "Yonghong Song" <yhs@fb.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
"Mauro Carvalho Chehab" <mchehab+samsung@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Nicolas Ferre" <nicolas.ferre@microchip.com>,
"Stanislav Fomichev" <sdf@google.com>,
"Quentin Monnet" <quentin.monnet@netronome.com>,
"Andrey Ignatov" <rdna@fb.com>, "Joe Stringer" <joe@wand.net.nz>
Subject: [PATCH bpf-next v3 03/10] bpf: lsm: Introduce types for eBPF based LSM
Date: Thu, 23 Jan 2020 07:24:33 -0800 [thread overview]
Message-ID: <20200123152440.28956-4-kpsingh@chromium.org> (raw)
In-Reply-To: <20200123152440.28956-1-kpsingh@chromium.org>
From: KP Singh <kpsingh@google.com>
A new eBPF program type BPF_PROG_TYPE_LSM with an
expected attach type of BPF_LSM_MAC. Attachment to LSM hooks is not
implemented in this patch.
On defining the types for the program, the macros expect that
<prog_name>_prog_ops and <prog_name>_verifier_ops exist. This is
implicitly required by the macro:
BPF_PROG_TYPE(BPF_PROG_TYPE_LSM, lsm, ...)
Signed-off-by: KP Singh <kpsingh@google.com>
Reviewed-by: Brendan Jackman <jackmanb@google.com>
Reviewed-by: Florent Revest <revest@google.com>
Reviewed-by: Thomas Garnier <thgarnie@google.com>
---
include/linux/bpf_types.h | 4 ++++
include/uapi/linux/bpf.h | 2 ++
kernel/bpf/syscall.c | 6 ++++++
security/bpf/Makefile | 2 +-
security/bpf/ops.c | 28 ++++++++++++++++++++++++++++
tools/include/uapi/linux/bpf.h | 2 ++
tools/lib/bpf/libbpf_probes.c | 1 +
7 files changed, 44 insertions(+), 1 deletion(-)
create mode 100644 security/bpf/ops.c
diff --git a/include/linux/bpf_types.h b/include/linux/bpf_types.h
index c81d4ece79a4..c36790b202e3 100644
--- a/include/linux/bpf_types.h
+++ b/include/linux/bpf_types.h
@@ -70,6 +70,10 @@ BPF_PROG_TYPE(BPF_PROG_TYPE_STRUCT_OPS, bpf_struct_ops,
void *, void *)
BPF_PROG_TYPE(BPF_PROG_TYPE_EXT, bpf_extension,
void *, void *)
+#ifdef CONFIG_SECURITY_BPF
+BPF_PROG_TYPE(BPF_PROG_TYPE_LSM, lsm,
+ void *, void *)
+#endif /* CONFIG_SECURITY_BPF */
#endif
BPF_MAP_TYPE(BPF_MAP_TYPE_ARRAY, array_map_ops)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index f1d74a2bd234..2f1e24a8c4a4 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -181,6 +181,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_TRACING,
BPF_PROG_TYPE_STRUCT_OPS,
BPF_PROG_TYPE_EXT,
+ BPF_PROG_TYPE_LSM,
};
enum bpf_attach_type {
@@ -210,6 +211,7 @@ enum bpf_attach_type {
BPF_TRACE_RAW_TP,
BPF_TRACE_FENTRY,
BPF_TRACE_FEXIT,
+ BPF_LSM_MAC,
__MAX_BPF_ATTACH_TYPE
};
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index a91ad518c050..eab4a36ee889 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -2396,6 +2396,9 @@ static int bpf_prog_attach(const union bpf_attr *attr)
case BPF_LIRC_MODE2:
ptype = BPF_PROG_TYPE_LIRC_MODE2;
break;
+ case BPF_LSM_MAC:
+ ptype = BPF_PROG_TYPE_LSM;
+ break;
case BPF_FLOW_DISSECTOR:
ptype = BPF_PROG_TYPE_FLOW_DISSECTOR;
break;
@@ -2427,6 +2430,9 @@ static int bpf_prog_attach(const union bpf_attr *attr)
case BPF_PROG_TYPE_LIRC_MODE2:
ret = lirc_prog_attach(attr, prog);
break;
+ case BPF_PROG_TYPE_LSM:
+ ret = -EOPNOTSUPP;
+ break;
case BPF_PROG_TYPE_FLOW_DISSECTOR:
ret = skb_flow_dissector_bpf_prog_attach(attr, prog);
break;
diff --git a/security/bpf/Makefile b/security/bpf/Makefile
index 26a0ab6f99b7..c78a8a056e7e 100644
--- a/security/bpf/Makefile
+++ b/security/bpf/Makefile
@@ -2,4 +2,4 @@
#
# Copyright 2019 Google LLC.
-obj-$(CONFIG_SECURITY_BPF) := lsm.o
+obj-$(CONFIG_SECURITY_BPF) := lsm.o ops.o
diff --git a/security/bpf/ops.c b/security/bpf/ops.c
new file mode 100644
index 000000000000..81c2bd9c0495
--- /dev/null
+++ b/security/bpf/ops.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2019 Google LLC.
+ */
+
+#include <linux/filter.h>
+#include <linux/bpf.h>
+
+const struct bpf_prog_ops lsm_prog_ops = {
+};
+
+static const struct bpf_func_proto *get_bpf_func_proto(
+ enum bpf_func_id func_id, const struct bpf_prog *prog)
+{
+ switch (func_id) {
+ case BPF_FUNC_map_lookup_elem:
+ return &bpf_map_lookup_elem_proto;
+ case BPF_FUNC_get_current_pid_tgid:
+ return &bpf_get_current_pid_tgid_proto;
+ default:
+ return NULL;
+ }
+}
+
+const struct bpf_verifier_ops lsm_verifier_ops = {
+ .get_func_proto = get_bpf_func_proto,
+};
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index f1d74a2bd234..2f1e24a8c4a4 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -181,6 +181,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_TRACING,
BPF_PROG_TYPE_STRUCT_OPS,
BPF_PROG_TYPE_EXT,
+ BPF_PROG_TYPE_LSM,
};
enum bpf_attach_type {
@@ -210,6 +211,7 @@ enum bpf_attach_type {
BPF_TRACE_RAW_TP,
BPF_TRACE_FENTRY,
BPF_TRACE_FEXIT,
+ BPF_LSM_MAC,
__MAX_BPF_ATTACH_TYPE
};
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index b782ebef6ac9..2c92059c0c90 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -108,6 +108,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
case BPF_PROG_TYPE_TRACING:
case BPF_PROG_TYPE_STRUCT_OPS:
case BPF_PROG_TYPE_EXT:
+ case BPF_PROG_TYPE_LSM:
default:
break;
}
--
2.20.1
next prev parent reply other threads:[~2020-01-23 15:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 15:24 [PATCH bpf-next v3 00/10] MAC and Audit policy using eBPF (KRSI) KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 01/10] bpf: btf: Add btf_type_by_name_kind KP Singh
2020-01-23 20:06 ` Andrii Nakryiko
2020-01-24 14:12 ` KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 02/10] bpf: lsm: Add a skeleton and config options KP Singh
2020-02-10 23:52 ` Alexei Starovoitov
2020-02-11 12:45 ` KP Singh
2020-01-23 15:24 ` KP Singh [this message]
2020-02-10 23:58 ` [PATCH bpf-next v3 03/10] bpf: lsm: Introduce types for eBPF based LSM Alexei Starovoitov
2020-02-11 12:44 ` KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 04/10] bpf: lsm: Add mutable hooks list for the BPF LSM KP Singh
2020-01-23 17:03 ` Casey Schaufler
2020-01-23 17:59 ` KP Singh
2020-01-23 19:09 ` Casey Schaufler
2020-01-23 22:24 ` KP Singh
2020-01-23 23:50 ` Casey Schaufler
2020-01-24 1:25 ` KP Singh
2020-01-24 21:55 ` James Morris
2020-02-11 3:12 ` Alexei Starovoitov
2020-02-11 12:43 ` KP Singh
2020-02-11 17:58 ` Alexei Starovoitov
2020-02-11 18:44 ` BPF LSM and fexit [was: [PATCH bpf-next v3 04/10] bpf: lsm: Add mutable hooks list for the BPF LSM] Jann Horn
2020-02-11 19:09 ` Alexei Starovoitov
2020-02-11 19:36 ` Jann Horn
2020-02-11 20:10 ` Alexei Starovoitov
2020-02-11 20:33 ` Jann Horn
2020-02-11 21:32 ` Jann Horn
2020-02-11 21:38 ` Alexei Starovoitov
2020-02-11 23:26 ` Alexei Starovoitov
2020-02-12 0:09 ` Daniel Borkmann
2020-02-12 2:45 ` Alexei Starovoitov
2020-02-12 13:27 ` Daniel Borkmann
2020-02-12 16:04 ` KP Singh
2020-02-12 15:52 ` Casey Schaufler
2020-02-12 16:26 ` KP Singh
2020-02-12 18:59 ` Casey Schaufler
2020-01-23 15:24 ` [PATCH bpf-next v3 05/10] bpf: lsm: BTF API for LSM hooks KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 06/10] bpf: lsm: Implement attach, detach and execution KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 07/10] bpf: lsm: Make the allocated callback RO+X KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 08/10] tools/libbpf: Add support for BPF_PROG_TYPE_LSM KP Singh
2020-01-23 18:00 ` Andrii Nakryiko
2020-01-24 14:16 ` KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 09/10] bpf: lsm: Add selftests " KP Singh
2020-01-23 15:24 ` [PATCH bpf-next v3 10/10] bpf: lsm: Add Documentation KP Singh
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200123152440.28956-4-kpsingh@chromium.org \
--to=kpsingh@chromium.org \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=brendan.d.gregg@gmail.com \
--cc=christian@brauner.io \
--cc=daniel@iogearbox.net \
--cc=davem@davemloft.net \
--cc=gregkh@linuxfoundation.org \
--cc=jackmanb@chromium.org \
--cc=jackmanb@google.com \
--cc=jannh@google.com \
--cc=jmorris@namei.org \
--cc=joe@wand.net.nz \
--cc=kafai@fb.com \
--cc=keescook@chromium.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=mchehab+samsung@kernel.org \
--cc=mhalcrow@google.com \
--cc=mic@digikod.net \
--cc=mjg59@google.com \
--cc=nicolas.ferre@microchip.com \
--cc=pjt@google.com \
--cc=quentin.monnet@netronome.com \
--cc=rdna@fb.com \
--cc=revest@chromium.org \
--cc=revest@google.com \
--cc=sdf@google.com \
--cc=serge@hallyn.com \
--cc=songliubraving@fb.com \
--cc=thgarnie@chromium.org \
--cc=thgarnie@google.com \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).