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| author |   Ilya Leoshkevich <iii@linux.ibm.com> | 2023-01-28 01:06:20 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2023-01-28 12:27:12 -0800 |
| commit | bf3849755ac606f2a04808b6b706a16867d1e1b8 (patch) | |
| tree | 7994311011b508ae41b851607acfd1e34104535d /tools/testing/selftests/bpf/prog_tests | |
| parent | Documentation: bpf: correct spelling (diff) | |
| download | wireguard-linux-bf3849755ac606f2a04808b6b706a16867d1e1b8.tar.xz wireguard-linux-bf3849755ac606f2a04808b6b706a16867d1e1b8.zip | |
bpf: Use ARG_CONST_SIZE_OR_ZERO for 3rd argument of bpf_tcp_raw_gen_syncookie_ipv{4,6}()
These functions already check that th_len < sizeof(*th), and
propagating the lower bound (th_len > 0) may be challenging
in complex code, e.g. as is the case with xdp_synproxy test on
s390x [1]. Switch to ARG_CONST_SIZE_OR_ZERO in order to make the
verifier accept code where it cannot prove that th_len > 0.
[1] https://lore.kernel.org/bpf/CAEf4Bzb3uiSHtUbgVWmkWuJ5Sw1UZd4c_iuS4QXtUkXmTTtXuQ@mail.gmail.com/
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230128000650.1516334-2-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests')
0 files changed, 0 insertions, 0 deletions