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| author | Geliang Tang <tanggeliang@kylinos.cn> | 2024-05-23 09:50:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-03 09:53:38 +0300 |
| commit | be953b4eb420c4366b204ae3e0b54da05083db1b (patch) | |
| tree | f4a4219d1da33ad496fbd4b54b29484ac888c020 /tools | |
| parent | a9e46f955409a40a7883fdfb152ce8bf8384480e (diff) | |
| download | linux-be953b4eb420c4366b204ae3e0b54da05083db1b.tar.xz | |
selftests/bpf: Check length of recv in test_sockmap
[ Upstream commit de1b5ea789dc28066cc8dc634b6825bd6148f38b ]
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>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/5172563f7c7b2a2e953cef02e89fc34664a7b190.1716446893.git.tanggeliang@kylinos.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/test_sockmap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index e32e49a3eec2..a181c0ccf98b 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -680,7 +680,8 @@ 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; |