From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: KP Singh <kpsingh@chromium.org>
Cc: linux-security-module@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>,
bpf <bpf@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Paul Turner <pjt@google.com>, Jann Horn <jannh@google.com>,
Florent Revest <revest@chromium.org>,
Brendan Jackman <jackmanb@chromium.org>
Subject: Re: [PATCH bpf-next v2 4/7] bpf: Attachment verification for BPF_MODIFY_RETURN
Date: Tue, 3 Mar 2020 21:12:57 -0800 [thread overview]
Message-ID: <CAEf4BzZdR-PTFZT5VJ7kMw=FNhsCUpbQvdypEWSF1JNuaye6Kw@mail.gmail.com> (raw)
In-Reply-To: <20200304015528.29661-5-kpsingh@chromium.org>
On Tue, Mar 3, 2020 at 5:56 PM KP Singh <kpsingh@chromium.org> wrote:
>
> From: KP Singh <kpsingh@google.com>
>
> - Allow BPF_MODIFY_RETURN attachment only to functions that are:
>
> * Whitelisted by for error injection i.e. by checking
> within_error_injection_list. Similar disucssions happened for the
> bpf_overrie_return helper.
2 typos: discussions and bpf_override_return ;)
>
> * security hooks, this is expected to be cleaned up with the LSM
> changes after the KRSI patches introduce the LSM_HOOK macro:
>
> https://lore.kernel.org/bpf/20200220175250.10795-1-kpsingh@chromium.org/
>
> - The attachment is currently limited to functions that return an int.
> This can be extended later other types (e.g. PTR).
>
> Signed-off-by: KP Singh <kpsingh@google.com>
> ---
Acked-by: Andrii Nakryiko <andriin@fb.com>
> kernel/bpf/btf.c | 28 ++++++++++++++++++++--------
> kernel/bpf/verifier.c | 31 +++++++++++++++++++++++++++++++
> 2 files changed, 51 insertions(+), 8 deletions(-)
>
[...]
next prev parent reply other threads:[~2020-03-04 5:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-04 1:55 [PATCH bpf-next v2 0/7] Introduce BPF_MODIFY_RET tracing progs KP Singh
2020-03-04 1:55 ` [PATCH bpf-next v2 1/7] bpf: Refactor trampoline update code KP Singh
2020-03-04 4:49 ` Andrii Nakryiko
2020-03-04 15:11 ` KP Singh
2020-03-04 1:55 ` [PATCH bpf-next v2 2/7] bpf: JIT helpers for fmod_ret progs KP Singh
2020-03-04 4:52 ` Andrii Nakryiko
2020-03-04 15:11 ` KP Singh
2020-03-04 15:24 ` KP Singh
2020-03-04 1:55 ` [PATCH bpf-next v2 3/7] bpf: Introduce BPF_MODIFY_RETURN KP Singh
2020-03-04 5:08 ` Andrii Nakryiko
2020-03-04 15:13 ` KP Singh
2020-03-04 1:55 ` [PATCH bpf-next v2 4/7] bpf: Attachment verification for BPF_MODIFY_RETURN KP Singh
2020-03-04 5:12 ` Andrii Nakryiko [this message]
2020-03-04 15:13 ` KP Singh
2020-03-04 1:55 ` [PATCH bpf-next v2 5/7] tools/libbpf: Add support " KP Singh
2020-03-04 1:55 ` [PATCH bpf-next v2 6/7] bpf: Add test ops for BPF_PROG_TYPE_TRACING KP Singh
2020-03-04 5:14 ` Andrii Nakryiko
2020-03-04 1:55 ` [PATCH bpf-next v2 7/7] bpf: Add selftests for BPF_MODIFY_RETURN KP Singh
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