netdev - Re: [PATCH v4 2/4] bpf-lsm: Make bpf_lsm_userns

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Message-ID: <CAHC9VhQZAdpQuWu7nHtGq2EtSyD=16awQ5p46Wz6Xd2Mwoew4A@mail.gmail.com>
Date:   Mon, 1 Aug 2022 19:06:06 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Frederick Lawler <fred@...udflare.com>, 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,
        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, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, kernel-team@...udflare.com,
        cgzones@...glemail.com, karl@...badwolfsecurity.com
Subject: Re: [PATCH v4 2/4] bpf-lsm: Make bpf_lsm_userns_create() sleepable

On Mon, Aug 1, 2022 at 7:00 PM Alexei Starovoitov
<alexei.starovoitov@...il.com> wrote:
>
> On Mon, Aug 01, 2022 at 01:01:44PM -0500, Frederick Lawler wrote:
> > 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>
>
> We can take this set through bpf-next tree if it's easier.

Thanks Alexei, but I'm currently planning to merge it into the LSM
next branch once the merge window closes.

> Or if it goes through other trees:
> Acked-by: Alexei Starovoitov <ast@...nel.org>

I appreciate the review/ACK, would you mind reviewing the tests too (patch 3/4)?

-- 
paul-moore.com