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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,
	Frederick Lawler <fred@cloudflare.com>
Subject: [PATCH v2 2/4] bpf-lsm: Make bpf_lsm_create_user_ns() sleepable
Date: Thu,  7 Jul 2022 17:32:26 -0500	[thread overview]
Message-ID: <20220707223228.1940249-3-fred@cloudflare.com> (raw)
In-Reply-To: <20220707223228.1940249-1-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_create_user_ns() sleepable
for mandatory access control policies.

Signed-off-by: Frederick Lawler <fred@cloudflare.com>

---
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..75853965e7b0 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_create_user_ns)
 BTF_SET_END(sleepable_lsm_hooks)
 
 bool bpf_lsm_is_sleepable_hook(u32 btf_id)
-- 
2.30.2


  parent reply	other threads:[~2022-07-07 22:32 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-07 22:32 [PATCH v2 0/4] Introduce security_create_user_ns() Frederick Lawler
2022-07-07 22:32 ` [PATCH v2 1/4] security, lsm: " Frederick Lawler
2022-07-07 22:32 ` Frederick Lawler [this message]
2022-07-07 22:32 ` [PATCH v2 3/4] selftests/bpf: Add tests verifying bpf lsm create_user_ns hook Frederick Lawler
2022-07-07 22:32 ` [PATCH v2 4/4] selinux: Implement " Frederick Lawler
2022-07-20  1:32   ` Paul Moore
2022-07-20 14:57     ` Frederick Lawler
     [not found]   ` <CA+EEuAhfMrg=goGhWxVW2=i4Z7mVN4GvfzettvX8T+tFcOPKCw@mail.gmail.com>
2022-07-20 14:52     ` Paul Moore
2022-07-08 12:10 ` [PATCH v2 0/4] Introduce security_create_user_ns() Christian Göttsche
2022-07-08 14:01   ` Frederick Lawler
2022-07-08 14:35     ` Christian Brauner
2022-07-08 16:11     ` Casey Schaufler
2022-07-14 14:27       ` Serge E. Hallyn
2022-07-19 19:59         ` Frederick Lawler
2022-07-20  1:32       ` Paul Moore
2022-07-20 21:42         ` Casey Schaufler
2022-07-20 22:39           ` Paul Moore

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