Commit f52e7f59 authored by Michal Luczaj's avatar Michal Luczaj Committed by Jakub Kicinski
Browse files

vsock/test: Adapt send_byte()/recv_byte() to handle MSG_ZEROCOPY 



For a zerocopy send(), buffer (always byte 'A') needs to be preserved (thus
it can not be on the stack) or the data recv()ed check in recv_byte() might
fail.

While there, change the printf format to 0x%02x so the '\0' bytes can be
seen.

Reviewed-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Signed-off-by: default avatarMichal Luczaj <mhal@rbox.co>
Link: https://patch.msgid.link/20241219-test-vsock-leaks-v4-4-a416e554d9d7@rbox.co


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 50f94344

tools/testing/vsock/util.c

+2 −2
Original line number Diff line number Diff line
@@ -401,7 +401,7 @@ void recv_buf(int fd, void *buf, size_t len, int flags, ssize_t expected_ret) 
 */

void send_byte(int fd, int expected_ret, int flags)

{

	const uint8_t byte = 'A';

	static const uint8_t byte = 'A';



	send_buf(fd, &byte, sizeof(byte), flags, expected_ret);

}
@@ -420,7 +420,7 @@ void recv_byte(int fd, int expected_ret, int flags) 
	recv_buf(fd, &byte, sizeof(byte), flags, expected_ret);



	if (byte != 'A') {

		fprintf(stderr, "unexpected byte read %c\n", byte);

		fprintf(stderr, "unexpected byte read 0x%02x\n", byte);

		exit(EXIT_FAILURE);

	}

}