linux-kernel - [PATCH bpf-next v3 0/5] Dynptr Verifier Adjustments

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Message-ID: <20230506013134.2492210-1-drosen@google.com>
Date:   Fri,  5 May 2023 18:31:29 -0700
From:   Daniel Rosenberg <drosen@...gle.com>
To:     bpf@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        John Fastabend <john.fastabend@...il.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Shuah Khan <shuah@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Joanne Koong <joannelkoong@...il.com>,
        Mykola Lysenko <mykolal@...com>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, kernel-team@...roid.com,
        Daniel Rosenberg <drosen@...gle.com>
Subject: [PATCH bpf-next v3 0/5] Dynptr Verifier Adjustments

These patches relax a few verifier requirements around dynptrs.
Patches 1-3 are unchanged from v2, apart from rebasing
Patch 4 is the same as in v1, see
https://lore.kernel.org/bpf/CA+PiJmST4WUH061KaxJ4kRL=fqy3X6+Wgb2E2rrLT5OYjUzxfQ@mail.gmail.com/
Patch 5 adds a test for the change in Patch 4

Daniel Rosenberg (5):
  bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)
  selftests/bpf: Test allowing NULL buffer in dynptr slice
  selftests/bpf: Check overflow in optional buffer
  bpf: verifier: Accept dynptr mem as mem in helpers
  selftests/bpf: Accept mem from dynptr in helper funcs

 Documentation/bpf/kfuncs.rst                  | 23 ++++++++++-
 include/linux/skbuff.h                        |  2 +-
 kernel/bpf/helpers.c                          | 30 +++++++++------
 kernel/bpf/verifier.c                         | 21 ++++++++--
 .../testing/selftests/bpf/prog_tests/dynptr.c |  2 +
 .../testing/selftests/bpf/progs/dynptr_fail.c | 20 ++++++++++
 .../selftests/bpf/progs/dynptr_success.c      | 38 +++++++++++++++++++
 7 files changed, 118 insertions(+), 18 deletions(-)


base-commit: f4dea9689c5fea3d07170c2cb0703e216f1a0922
-- 
2.40.1.521.gf1e218fcd8-goog