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Date: Mon, 1 Aug 2022 13:01:44 -0500 From: Frederick Lawler <fred@...udflare.com> To: kpsingh@...nel.org, revest@...omium.org, jackmanb@...omium.org, ast@...nel.org, daniel@...earbox.net, andrii@...nel.org, kafai@...com, songliubraving@...com, yhs@...com, john.fastabend@...il.com, jmorris@...ei.org, serge@...lyn.com, paul@...l-moore.com, stephen.smalley.work@...il.com, eparis@...isplace.org, shuah@...nel.org, brauner@...nel.org, casey@...aufler-ca.com, ebiederm@...ssion.com, bpf@...r.kernel.org, linux-security-module@...r.kernel.org, selinux@...r.kernel.org, linux-kselftest@...r.kernel.org Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, kernel-team@...udflare.com, cgzones@...glemail.com, karl@...badwolfsecurity.com, Frederick Lawler <fred@...udflare.com> Subject: [PATCH v4 2/4] bpf-lsm: Make bpf_lsm_userns_create() sleepable 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@...udflare.com> Acked-by: Christian Brauner (Microsoft) <brauner@...nel.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
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