From: "Alexei Starovoitov" <alexei.starovoitov@gmail.com>
To: "Alan Maguire" <alan.maguire@oracle.com>, <andrii@kernel.org>,
<eddyz87@gmail.com>, <qmo@kernel.org>
Cc: <jolsa@kernel.org>, <daniel@iogearbox.net>,
<ihor.solodrai@linux.dev>, <yonghong.song@linux.dev>,
<song@kernel.org>, <martin.lau@linux.dev>, <memxor@gmail.com>,
<emil@etsalapatis.com>, <bpf@vger.kernel.org>, <nsc@kernel.org>,
<puranjay@kernel.org>, <yatsenko@meta.com>
Subject: Re: [PATCH v4 bpf-next 01/11] btf: Extend UAPI to support BTF location (inline site) info
Date: Thu, 24 Sep 2026 15:18:43 +0000 [thread overview]
Message-ID: <DLNNB8VZKDR4.2L3UZSU3AP1S9@gmail.com> (raw)
In-Reply-To: <20260924111428.75957-2-alan.maguire@oracle.com>
On Thu, Sep 24, 2026 at 12:14 PM Alan Maguire <alan.maguire@oracle.com> wrote:
> + size = t->size;
> + if (!size || size > 16) {
> + btf_verifier_log_type(env, t, "Unexpected size");
> + return -EINVAL;
> + }
> +
> + if (btf_type_kflag(t)) {
> + btf_verifier_log_type(env, t, "Invalid btf_info kind_flag");
> + return -EINVAL;
> + }
flags and vlen are not checked.
flags == 0xffffffff with vlen == 0 is accepted.
So are CONST | REG and DEREF without REG.
Probably should reject everything that the uapi doesn't define,
so that the remaining 26 bits can be used later?
next prev parent reply other threads:[~2026-09-24 15:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-24 11:14 [PATCH v4 bpf-next 00/11] Support inline functions in BTF Alan Maguire
2026-09-24 11:14 ` [PATCH v4 bpf-next 01/11] btf: Extend UAPI to support BTF location (inline site) info Alan Maguire
2026-09-24 12:12 ` bot+bpf-ci
2026-09-24 15:18 ` Alexei Starovoitov [this message]
2026-09-24 11:14 ` [PATCH v4 bpf-next 02/11] libbpf: Add support for BTF kinds LOC[_PARAM|_PROTO|SEC] Alan Maguire
2026-09-24 12:12 ` bot+bpf-ci
2026-09-24 11:14 ` [PATCH v4 bpf-next 03/11] selftests/bpf: Test helper support for BTF_KIND_LOC[_PARAM|_PROTO|SEC] Alan Maguire
2026-09-24 11:14 ` [PATCH v4 bpf-next 04/11] selftests/bpf: Add LOC_PARAM, LOC_PROTO, LOCSEC to field iter tests Alan Maguire
2026-09-24 11:14 ` [PATCH v4 bpf-next 05/11] selftests/bpf: Add LOC_PARAM, LOC_PROTO, LOCSEC to dedup split tests Alan Maguire
2026-09-24 11:14 ` [PATCH v4 bpf-next 06/11] selftests/bpf: BTF distill tests to ensure LOC[_PARAM|_PROTO] add to split BTF Alan Maguire
2026-09-24 11:56 ` bot+bpf-ci
2026-09-24 11:14 ` [PATCH v4 bpf-next 07/11] bpftool: Handle multi-split BTF by supporting multiple base BTFs Alan Maguire
2026-09-24 11:14 ` [PATCH v4 bpf-next 08/11] bpftool: Document support for multi-split BTF Alan Maguire
2026-09-24 11:14 ` [PATCH v4 bpf-next 09/11] bpftool: Add ability to dump LOC_PARAM, LOC_PROTO and LOCSEC Alan Maguire
2026-09-24 15:16 ` Alexei Starovoitov
2026-09-24 15:33 ` Alan Maguire
2026-09-24 16:02 ` Alexei Starovoitov
2026-09-24 11:14 ` [PATCH v4 bpf-next 10/11] selftests/bpf: Test bpftool dump of BTF location info Alan Maguire
2026-09-24 11:56 ` bot+bpf-ci
2026-09-24 11:14 ` [PATCH v4 bpf-next 11/11] Documentation/bpf: Describe new location-related BTF kinds Alan Maguire
2026-09-24 11:56 ` bot+bpf-ci
2026-09-24 12:19 ` sashiko-bot
2026-09-24 16:10 ` [PATCH v4 bpf-next 00/11] Support inline functions in BTF patchwork-bot+netdevbpf
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