From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Alexei Starovoitov <ast@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>,
Daniel Borkmann <daniel@iogearbox.net>,
x86@kernel.org, Networking <netdev@vger.kernel.org>,
bpf <bpf@vger.kernel.org>, Kernel Team <kernel-team@fb.com>
Subject: Re: [PATCH v2 bpf-next 03/12] bpf: process in-kernel BTF
Date: Fri, 11 Oct 2019 10:56:46 -0700 [thread overview]
Message-ID: <CAEf4BzYf3Q9rbwfG8PbXCHm=QoegP0d8ezYWqwtdNcSORdzhTA@mail.gmail.com> (raw)
In-Reply-To: <20191010041503.2526303-4-ast@kernel.org>
On Wed, Oct 9, 2019 at 9:15 PM Alexei Starovoitov <ast@kernel.org> wrote:
>
> If in-kernel BTF exists parse it and prepare 'struct btf *btf_vmlinux'
> for further use by the verifier.
> In-kernel BTF is trusted just like kallsyms and other build artifacts
> embedded into vmlinux.
> Yet run this BTF image through BTF verifier to make sure
> that it is valid and it wasn't mangled during the build.
> If in-kernel BTF is incorrect it means either gcc or pahole or kernel
> are buggy. In such case disallow loading BPF programs.
>
> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
> ---
Acked-by: Andrii Nakryiko <andriin@fb.com>
> include/linux/bpf_verifier.h | 4 +-
> include/linux/btf.h | 1 +
> kernel/bpf/btf.c | 71 +++++++++++++++++++++++++++++++++++-
> kernel/bpf/verifier.c | 20 ++++++++++
> 4 files changed, 94 insertions(+), 2 deletions(-)
>
[...]
next prev parent reply other threads:[~2019-10-11 17:56 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-10 4:14 [PATCH v2 bpf-next 00/12] bpf: revolutionize bpf tracing Alexei Starovoitov
2019-10-10 4:14 ` [PATCH v2 bpf-next 01/12] bpf: add typecast to raw_tracepoints to help BTF generation Alexei Starovoitov
2019-10-10 4:14 ` [PATCH v2 bpf-next 02/12] bpf: add typecast to bpf helpers " Alexei Starovoitov
2019-10-10 4:14 ` [PATCH v2 bpf-next 03/12] bpf: process in-kernel BTF Alexei Starovoitov
2019-10-11 17:56 ` Andrii Nakryiko [this message]
2019-10-10 4:14 ` [PATCH v2 bpf-next 04/12] bpf: add attach_btf_id attribute to program load Alexei Starovoitov
2019-10-11 17:58 ` Andrii Nakryiko
2019-10-10 4:14 ` [PATCH v2 bpf-next 05/12] libbpf: auto-detect btf_id of raw_tracepoint Alexei Starovoitov
2019-10-11 18:02 ` Andrii Nakryiko
2019-10-11 18:07 ` Andrii Nakryiko
2019-10-12 0:40 ` Alexei Starovoitov
2019-10-12 1:29 ` Alexei Starovoitov
2019-10-12 4:38 ` Andrii Nakryiko
2019-10-12 4:53 ` Alexei Starovoitov
2019-10-12 4:39 ` Andrii Nakryiko
2019-10-10 4:14 ` [PATCH v2 bpf-next 06/12] bpf: implement accurate raw_tp context access via BTF Alexei Starovoitov
2019-10-11 18:31 ` Andrii Nakryiko
2019-10-11 23:13 ` Andrii Nakryiko
2019-10-10 4:14 ` [PATCH v2 bpf-next 07/12] bpf: attach raw_tp program with BTF via type name Alexei Starovoitov
2019-10-11 18:44 ` Andrii Nakryiko
2019-10-10 4:14 ` [PATCH v2 bpf-next 08/12] bpf: add support for BTF pointers to interpreter Alexei Starovoitov
2019-10-10 4:15 ` [PATCH v2 bpf-next 09/12] bpf: add support for BTF pointers to x86 JIT Alexei Starovoitov
2019-10-11 18:48 ` Andrii Nakryiko
2019-10-10 4:15 ` [PATCH v2 bpf-next 10/12] bpf: check types of arguments passed into helpers Alexei Starovoitov
2019-10-11 19:02 ` Andrii Nakryiko
2019-10-12 1:39 ` Alexei Starovoitov
2019-10-12 4:25 ` Andrii Nakryiko
2019-10-10 4:15 ` [PATCH v2 bpf-next 11/12] bpf: disallow bpf_probe_read[_str] helpers Alexei Starovoitov
2019-10-11 19:03 ` Andrii Nakryiko
2019-10-10 4:15 ` [PATCH v2 bpf-next 12/12] selftests/bpf: add kfree_skb raw_tp test Alexei Starovoitov
2019-10-10 11:07 ` Ido Schimmel
2019-10-10 19:07 ` Alexei Starovoitov
2019-10-11 19:05 ` Andrii Nakryiko
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