From: Kees Cook <keescook@chromium.org>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Paul Moore <paul@paul-moore.com>,
Andrii Nakryiko <andrii@kernel.org>,
bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
kpsingh@kernel.org, linux-security-module@vger.kernel.org
Subject: Re: [PATCH bpf-next 0/8] New BPF map and BTF security LSM hooks
Date: Fri, 21 Apr 2023 11:57:22 -0700 [thread overview]
Message-ID: <6442dc93.170a0220.aacc4.65b3@mx.google.com> (raw)
In-Reply-To: <CAEf4BzaBt0W3sWh_L4RRXEFYdBotzVEnQdqC7BO+PNWtD7eSUA@mail.gmail.com>
On Thu, Apr 20, 2023 at 05:00:55PM -0700, Andrii Nakryiko wrote:
> Alright. I now do have an alternative approach in mind that will only
> use restrictive LSMs and will still allow BPF usage within user
> namespaces.
It seems the problem with in the existing kernel is that bpf_capable() is
rather inflexible. In only one place is sysctl_unprivileged_bpf_disabled
checked (outside the unprivileged_ebpf_enabled() checks in CPU errata
fixes).
Should CAP_BPF be per-namespace?
--
Kees Cook
next prev parent reply other threads:[~2023-04-21 18:57 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-12 4:32 [PATCH bpf-next 0/8] New BPF map and BTF security LSM hooks Andrii Nakryiko
2023-04-12 4:32 ` [PATCH bpf-next 1/8] bpf: move unprivileged checks into map_create() and bpf_prog_load() Andrii Nakryiko
2023-04-12 17:49 ` Kees Cook
2023-04-13 0:22 ` Andrii Nakryiko
2023-04-12 4:32 ` [PATCH bpf-next 2/8] bpf: inline map creation logic in map_create() function Andrii Nakryiko
2023-04-12 17:53 ` Kees Cook
2023-04-13 0:22 ` Andrii Nakryiko
2023-04-12 4:32 ` [PATCH bpf-next 3/8] bpf: centralize permissions checks for all BPF map types Andrii Nakryiko
2023-04-12 18:01 ` Kees Cook
2023-04-13 0:23 ` Andrii Nakryiko
2023-04-12 4:32 ` [PATCH bpf-next 4/8] bpf, lsm: implement bpf_map_create_security LSM hook Andrii Nakryiko
2023-04-12 18:20 ` Kees Cook
2023-04-13 0:23 ` Andrii Nakryiko
2023-04-12 4:32 ` [PATCH bpf-next 5/8] selftests/bpf: validate new " Andrii Nakryiko
2023-04-12 18:23 ` Kees Cook
2023-04-13 0:23 ` Andrii Nakryiko
2023-04-12 4:32 ` [PATCH bpf-next 6/8] bpf: drop unnecessary bpf_capable() check in BPF_MAP_FREEZE command Andrii Nakryiko
2023-04-12 18:24 ` Kees Cook
2023-04-13 0:17 ` Andrii Nakryiko
2023-04-12 4:32 ` [PATCH bpf-next 7/8] bpf, lsm: implement bpf_btf_load_security LSM hook Andrii Nakryiko
2023-04-12 16:52 ` Paul Moore
2023-04-13 1:43 ` Andrii Nakryiko
2023-04-13 2:47 ` Paul Moore
2023-04-12 4:33 ` [PATCH bpf-next 8/8] selftests/bpf: enhance lsm_map_create test with BTF LSM control Andrii Nakryiko
2023-04-12 16:49 ` [PATCH bpf-next 0/8] New BPF map and BTF security LSM hooks Paul Moore
2023-04-12 17:47 ` Kees Cook
2023-04-12 18:06 ` Paul Moore
2023-04-12 18:28 ` Kees Cook
2023-04-12 19:06 ` Paul Moore
2023-04-13 1:43 ` Andrii Nakryiko
2023-04-13 2:56 ` Paul Moore
2023-04-13 5:16 ` Andrii Nakryiko
2023-04-13 15:11 ` Paul Moore
2023-04-17 23:29 ` Andrii Nakryiko
2023-04-18 0:47 ` Casey Schaufler
2023-04-21 0:00 ` Andrii Nakryiko
2023-04-18 14:21 ` Paul Moore
2023-04-21 0:00 ` Andrii Nakryiko
2023-04-21 18:57 ` Kees Cook [this message]
2023-04-13 16:54 ` Casey Schaufler
2023-04-17 23:31 ` Andrii Nakryiko
2023-04-13 19:03 ` Jonathan Corbet
2023-04-17 23:28 ` Andrii Nakryiko
2023-04-13 16:27 ` Casey Schaufler
2023-04-17 23:31 ` Andrii Nakryiko
2023-04-17 23:53 ` Casey Schaufler
2023-04-18 0:28 ` Andrii Nakryiko
2023-04-18 0:52 ` Casey Schaufler
2023-04-12 18:38 ` Casey Schaufler
2023-04-14 20:23 ` Dr. Greg
2023-04-17 23:31 ` Andrii Nakryiko
2023-04-19 10:53 ` Dr. Greg
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