From: Frederick Lawler <fred@cloudflare.com>
To: kpsingh@kernel.org, revest@chromium.org, jackmanb@chromium.org,
ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
kafai@fb.com, songliubraving@fb.com, yhs@fb.com,
john.fastabend@gmail.com, jmorris@namei.org, serge@hallyn.com,
paul@paul-moore.com, stephen.smalley.work@gmail.com,
eparis@parisplace.org, shuah@kernel.org, brauner@kernel.org,
casey@schaufler-ca.com, ebiederm@xmission.com,
bpf@vger.kernel.org, linux-security-module@vger.kernel.org,
selinux@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
kernel-team@cloudflare.com, cgzones@googlemail.com,
karl@bigbadwolfsecurity.com,
Frederick Lawler <fred@cloudflare.com>
Subject: [PATCH v4 2/4] bpf-lsm: Make bpf_lsm_userns_create() sleepable
Date: Mon, 1 Aug 2022 13:01:44 -0500 [thread overview]
Message-ID: <20220801180146.1157914-3-fred@cloudflare.com> (raw)
In-Reply-To: <20220801180146.1157914-1-fred@cloudflare.com>
Users may want to audit calls to security_create_user_ns() and access
user space memory. Also create_user_ns() runs without
pagefault_disabled(). Therefore, make bpf_lsm_userns_create() sleepable
for mandatory access control policies.
Signed-off-by: Frederick Lawler <fred@cloudflare.com>
Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org>
---
Changes since v3:
- None
Changes since v2:
- Rename create_user_ns hook to userns_create
Changes since v1:
- None
---
kernel/bpf/bpf_lsm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/bpf/bpf_lsm.c b/kernel/bpf/bpf_lsm.c
index c1351df9f7ee..4593437809cc 100644
--- a/kernel/bpf/bpf_lsm.c
+++ b/kernel/bpf/bpf_lsm.c
@@ -250,6 +250,7 @@ BTF_ID(func, bpf_lsm_task_getsecid_obj)
BTF_ID(func, bpf_lsm_task_prctl)
BTF_ID(func, bpf_lsm_task_setscheduler)
BTF_ID(func, bpf_lsm_task_to_inode)
+BTF_ID(func, bpf_lsm_userns_create)
BTF_SET_END(sleepable_lsm_hooks)
bool bpf_lsm_is_sleepable_hook(u32 btf_id)
--
2.30.2
next prev parent reply other threads:[~2022-08-01 18:02 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-01 18:01 [PATCH v4 0/4] Introduce security_create_user_ns() Frederick Lawler
2022-08-01 18:01 ` [PATCH v4 1/4] security, lsm: " Frederick Lawler
2022-08-02 21:47 ` KP Singh
2022-08-03 13:13 ` Frederick Lawler
2022-08-01 18:01 ` Frederick Lawler [this message]
2022-08-01 23:00 ` [PATCH v4 2/4] bpf-lsm: Make bpf_lsm_userns_create() sleepable Alexei Starovoitov
2022-08-01 23:06 ` Paul Moore
2022-08-02 21:29 ` KP Singh
2022-08-01 18:01 ` [PATCH v4 3/4] selftests/bpf: Add tests verifying bpf lsm userns_create hook Frederick Lawler
2022-08-02 22:08 ` KP Singh
2022-08-01 18:01 ` [PATCH v4 4/4] selinux: Implement " Frederick Lawler
2022-08-02 2:56 ` [PATCH v4 0/4] Introduce security_create_user_ns() Eric W. Biederman
2022-08-03 2:10 ` Paul Moore
2022-08-08 18:56 ` Eric W. Biederman
2022-08-08 19:16 ` Paul Moore
2022-08-08 19:26 ` Eric W. Biederman
2022-08-08 19:43 ` Eric W. Biederman
2022-08-08 22:47 ` Paul Moore
2022-08-09 16:07 ` Eric W. Biederman
2022-08-09 16:47 ` Paul Moore
2022-08-09 21:40 ` Eric W. Biederman
2022-08-09 22:40 ` Paul Moore
2022-08-10 0:51 ` Alexei Starovoitov
2022-08-09 17:43 ` Casey Schaufler
2022-08-09 21:52 ` Eric W. Biederman
2022-08-08 19:49 ` Paul Moore
2022-08-09 16:40 ` Eric W. Biederman
2022-08-14 15:55 ` Serge E. Hallyn
2022-08-15 2:32 ` Paul Moore
2022-08-15 15:41 ` Serge E. Hallyn
2022-08-15 16:24 ` Paul Moore
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