linux-kernel - [PATCH net-next 2/2] vsock/test: check also expected errno on sigpipe test

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250508142005.135857-3-sgarzare@redhat.com>
Date: Thu,  8 May 2025 16:20:05 +0200
From: Stefano Garzarella <sgarzare@...hat.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Stefano Garzarella <sgarzare@...hat.com>,
	virtualization@...ts.linux.dev
Subject: [PATCH net-next 2/2] vsock/test: check also expected errno on sigpipe test

From: Stefano Garzarella <sgarzare@...hat.com>

In the sigpipe test, we expect send() to fail, but we do not check if
send() fails with the errno we expect (EPIPE).

Add this check and repeat the send() in case of EINTR as we do in other
tests.

Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
---
 tools/testing/vsock/vsock_test.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
index 7de870dee1cf..533d9463a297 100644
--- a/tools/testing/vsock/vsock_test.c
+++ b/tools/testing/vsock/vsock_test.c
@@ -1074,9 +1074,13 @@ static void test_stream_check_sigpipe(int fd)
 	do {
 		res = send(fd, "A", 1, 0);
 		timeout_check("send");
-	} while (res != -1);
+	} while (res != -1 && errno == EINTR);
 	timeout_end();
 
+	if (errno != EPIPE) {
+		fprintf(stderr, "unexpected send(2) errno %d\n", errno);
+		exit(EXIT_FAILURE);
+	}
 	if (!have_sigpipe) {
 		fprintf(stderr, "SIGPIPE expected\n");
 		exit(EXIT_FAILURE);
@@ -1088,9 +1092,13 @@ static void test_stream_check_sigpipe(int fd)
 	do {
 		res = send(fd, "A", 1, MSG_NOSIGNAL);
 		timeout_check("send");
-	} while (res != -1);
+	} while (res != -1 && errno == EINTR);
 	timeout_end();
 
+	if (errno != EPIPE) {
+		fprintf(stderr, "unexpected send(2) errno %d\n", errno);
+		exit(EXIT_FAILURE);
+	}
 	if (have_sigpipe) {
 		fprintf(stderr, "SIGPIPE not expected\n");
 		exit(EXIT_FAILURE);
-- 
2.49.0