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selftests/bpf: Check length of recv in test_sockmap

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[ Upstream commit de1b5ea789 ]

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: 16962b2404 ("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>
This commit is contained in:
Geliang Tang
2024-05-23 14:50:03 +08:00
committed by Greg Kroah-Hartman
parent 5bf89e8fda
commit 4f44cb495c
1 changed files with 2 additions and 1 deletions
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tools/testing/selftests/bpf/test_sockmap.c
+2 -1
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@@ -663,7 +663,8 @@ 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 (data) {
int chunk_sz = opt->sendpage ?