netdev - [PATCH v3 bpf 0/3] fix BTF verification size resolution

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Message-ID: <20190712172557.4039121-1-andriin@fb.com>
Date:   Fri, 12 Jul 2019 10:25:54 -0700
From:   Andrii Nakryiko <andriin@...com>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <ast@...com>,
        <daniel@...earbox.net>, <yhs@...com>
CC:     <andrii.nakryiko@...il.com>, <kernel-team@...com>,
        Andrii Nakryiko <andriin@...com>
Subject: [PATCH v3 bpf 0/3] fix BTF verification size resolution

BTF size resolution logic isn't always resolving type size correctly, leading
to erroneous map creation failures due to value size mismatch.

This patch set:
1. fixes the issue (patch #1);
2. adds tests for trickier cases (patch #2);
3. and converts few test cases utilizing BTF-defined maps, that previously
   couldn't use typedef'ed arrays due to kernel bug (patch #3).

Andrii Nakryiko (3):
  bpf: fix BTF verifier size resolution logic
  selftests/bpf: add trickier size resolution tests
  selftests/bpf: use typedef'ed arrays as map values

 kernel/bpf/btf.c                              | 19 ++--
 .../bpf/progs/test_get_stack_rawtp.c          |  3 +-
 .../bpf/progs/test_stacktrace_build_id.c      |  3 +-
 .../selftests/bpf/progs/test_stacktrace_map.c |  2 +-
 tools/testing/selftests/bpf/test_btf.c        | 88 +++++++++++++++++++
 5 files changed, 104 insertions(+), 11 deletions(-)

-- 
2.17.1