From: John Fastabend <john.fastabend@gmail.com>
To: Geliang Tang <geliang@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Eduard Zingerman <eddyz87@gmail.com>,
Mykola Lysenko <mykolal@fb.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <martin.lau@linux.dev>,
Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
Stanislav Fomichev <sdf@google.com>,
Hao Luo <haoluo@google.com>, Jiri Olsa <jolsa@kernel.org>,
Shuah Khan <shuah@kernel.org>,
Jakub Sitnicki <jakub@cloudflare.com>
Cc: Geliang Tang <tanggeliang@kylinos.cn>,
bpf@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: RE: [PATCH bpf-next 7/8] selftests/bpf: Check length of recv in test_sockmap
Date: Mon, 27 May 2024 10:06:34 -0700 [thread overview]
Message-ID: <6654bd9a46bd5_23de20826@john.notmuch> (raw)
In-Reply-To: <5172563f7c7b2a2e953cef02e89fc34664a7b190.1716446893.git.tanggeliang@kylinos.cn>
Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
>
> The value of recv in msg_loop may be negative, like EWOULDBLOCK, so it's
> necessary to check if it is positive before accumulating it to bytes_recvd.
>
> Fixes: 16962b2404ac ("bpf: sockmap, add selftests")
> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
> ---
> tools/testing/selftests/bpf/test_sockmap.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
> index 3654babfac59..4c7cb206b31d 100644
> --- a/tools/testing/selftests/bpf/test_sockmap.c
> +++ b/tools/testing/selftests/bpf/test_sockmap.c
> @@ -681,7 +681,8 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
> }
> }
>
> - s->bytes_recvd += recv;
> + if (recv > 0)
> + s->bytes_recvd += recv;
>
> if (opt->check_recved_len && s->bytes_recvd > total_bytes) {
> errno = EMSGSIZE;
> --
> 2.43.0
>
Acked-by: John Fastabend <john.fastabend@gmail.com>
next prev parent reply other threads:[~2024-05-27 17:06 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-23 6:49 [PATCH bpf-next 0/8] fixes for test_sockmap Geliang Tang
2024-05-23 6:49 ` [PATCH bpf-next 1/8] selftests/bpf: Fix tx_prog_fd values in test_sockmap Geliang Tang
2024-05-27 17:02 ` John Fastabend
2024-05-23 6:49 ` [PATCH bpf-next 2/8] selftests/bpf: Drop duplicate definition of i " Geliang Tang
2024-05-27 17:03 ` John Fastabend
2024-05-23 6:49 ` [PATCH bpf-next 3/8] selftests/bpf: Use bpf_link attachments " Geliang Tang
2024-05-27 17:12 ` John Fastabend
2024-05-27 19:36 ` Jakub Sitnicki
2024-05-28 4:12 ` Geliang Tang
2024-05-30 23:45 ` John Fastabend
2024-05-31 11:13 ` Jakub Sitnicki
2024-05-31 14:35 ` Geliang Tang
2024-05-23 6:50 ` [PATCH bpf-next 4/8] selftests/bpf: Replace tx_prog_fd with tx_prog " Geliang Tang
2024-05-23 6:50 ` [PATCH bpf-next 5/8] selftests/bpf: Drop prog_fd array " Geliang Tang
2024-05-23 6:50 ` [PATCH bpf-next 6/8] selftests/bpf: Fix size of map_fd " Geliang Tang
2024-05-27 17:06 ` John Fastabend
2024-05-23 6:50 ` [PATCH bpf-next 7/8] selftests/bpf: Check length of recv " Geliang Tang
2024-05-27 17:06 ` John Fastabend [this message]
2024-05-23 6:50 ` [PATCH bpf-next 8/8] selftests/bpf: Drop duplicate bpf_map_lookup_elem " Geliang Tang
2024-05-27 17:06 ` John Fastabend
2024-05-31 11:06 ` [PATCH bpf-next 0/8] fixes for test_sockmap Jakub Sitnicki
2024-06-03 17:40 ` patchwork-bot+netdevbpf
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