diff mbox series

[bpf-next,7/8] selftests/bpf: Check length of recv in test_sockmap

Message ID 5172563f7c7b2a2e953cef02e89fc34664a7b190.1716446893.git.tanggeliang@kylinos.cn (mailing list archive)
State Accepted
Commit de1b5ea789dc28066cc8dc634b6825bd6148f38b
Delegated to: BPF
Headers show
Series fixes for test_sockmap | expand

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Commit Message

Geliang Tang May 23, 2024, 6:50 a.m. UTC 
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(-)

Comments

John Fastabend May 27, 2024, 5:06 p.m. UTC | #1 
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>
diff mbox series

Patch

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;