From: Yohei Kojima <yk@y-koj.net>
Date: Tue, 13 Jan 2026 14:11:55 +0000 (+0900)
Subject: selftests: net: improve error handling in passive TFO test
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=342e31254f02041e3b9d4ad573204d53b2f832c9;p=thirdparty%2Fkernel%2Flinux.git

selftests: net: improve error handling in passive TFO test

Improve the error handling in passive TFO test to check the return value
from sendto(), and to fail if read() or fprintf() failed.

Signed-off-by: Yohei Kojima <yk@y-koj.net>
Link: https://patch.msgid.link/24707c8133f7095c0e5a94afa69e75c3a80bf6e7.1768312014.git.yk@y-koj.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/tools/testing/selftests/net/tfo.c b/tools/testing/selftests/net/tfo.c
index 8d82140f0f767..3b1ee2d3d4170 100644
--- a/tools/testing/selftests/net/tfo.c
+++ b/tools/testing/selftests/net/tfo.c
@@ -82,8 +82,10 @@ static void run_server(void)
 		error(1, errno, "getsockopt(SO_INCOMING_NAPI_ID)");
 
 	if (read(connfd, buf, 64) < 0)
-		perror("read()");
-	fprintf(outfile, "%d\n", opt);
+		error(1, errno, "read()");
+
+	if (fprintf(outfile, "%d\n", opt) < 0)
+		error(1, errno, "fprintf()");
 
 	fclose(outfile);
 	close(connfd);
@@ -92,14 +94,17 @@ static void run_server(void)
 
 static void run_client(void)
 {
-	int fd;
+	int fd, ret;
 	char *msg = "Hello, world!";
 
 	fd = socket(AF_INET6, SOCK_STREAM, 0);
 	if (fd == -1)
 		error(1, errno, "socket()");
 
-	sendto(fd, msg, strlen(msg), MSG_FASTOPEN, (struct sockaddr *)&cfg_addr, sizeof(cfg_addr));
+	ret = sendto(fd, msg, strlen(msg), MSG_FASTOPEN,
+		     (struct sockaddr *)&cfg_addr, sizeof(cfg_addr));
+	if (ret < 0)
+		error(1, errno, "sendto()");
 
 	close(fd);
 }