From: Yonghong Song <yhs@fb.com>
To: <bpf@vger.kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>, <kernel-team@fb.com>
Subject: [PATCH bpf-next 0/2] fix a verifier failure with xor
Date: Mon, 24 Aug 2020 23:46:08 -0700 [thread overview]
Message-ID: <20200825064608.2017878-1-yhs@fb.com> (raw)
The bpf selftest test_progs/test_sk_assign failed with llvm11 and llvm12.
The reason is that the verifier did not handle xor operation and generate
very conservative register bound. Patch #1 tries to fix the verifier
issue and Patch #2 added additional tests in selftest test_verifier.
Yonghong Song (2):
bpf: fix a verifier failure with xor
selftests/bpf: add verifier tests for xor operation
kernel/bpf/verifier.c | 66 ++++++++
tools/testing/selftests/bpf/verifier/bounds.c | 146 ++++++++++++++++++
2 files changed, 212 insertions(+)
--
2.24.1
next reply other threads:[~2020-08-25 6:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 6:46 Yonghong Song [this message]
2020-08-25 6:46 ` [PATCH bpf-next 1/2] bpf: fix a verifier failure with xor Yonghong Song
2020-08-26 1:58 ` Alexei Starovoitov
2020-08-26 3:36 ` Yonghong Song
2020-08-26 22:06 ` John Fastabend
2020-08-27 5:12 ` Alexei Starovoitov
2020-08-27 18:43 ` John Fastabend
2020-09-01 20:07 ` Andrii Nakryiko
2020-09-02 2:17 ` Yonghong Song
2020-09-02 5:27 ` John Fastabend
2020-09-02 5:43 ` Yonghong Song
2020-09-04 5:29 ` John Fastabend
2020-09-02 9:33 ` Toke Høiland-Jørgensen
2020-09-02 14:21 ` Alexei Starovoitov
2020-09-02 15:01 ` Toke Høiland-Jørgensen
2020-09-02 21:40 ` Alexei Starovoitov
2020-08-25 6:46 ` [PATCH bpf-next 2/2] selftests/bpf: add verifier tests for xor operation Yonghong Song
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