[PATCH 4.19 51/79] selftests: net: reuseport_dualstack: fix uninitalized parameter

From: Greg Kroah-Hartman
Date: Fri Nov 08 2019 - 14:16:39 EST


From: Wei Wang <weiwan@xxxxxxxxxx>

[ Upstream commit d64479a3e3f9924074ca7b50bd72fa5211dca9c1 ]

This test reports EINVAL for getsockopt(SOL_SOCKET, SO_DOMAIN)
occasionally due to the uninitialized length parameter.
Initialize it to fix this, and also use int for "test_family" to comply
with the API standard.

Fixes: d6a61f80b871 ("soreuseport: test mixed v4/v6 sockets")
Reported-by: Maciej Åenczykowski <maze@xxxxxxxxxx>
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: Wei Wang <weiwan@xxxxxxxxxx>
Cc: Craig Gallek <cgallek@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/net/reuseport_dualstack.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/net/reuseport_dualstack.c
+++ b/tools/testing/selftests/net/reuseport_dualstack.c
@@ -129,7 +129,7 @@ static void test(int *rcv_fds, int count
{
struct epoll_event ev;
int epfd, i, test_fd;
- uint16_t test_family;
+ int test_family;
socklen_t len;

epfd = epoll_create(1);
@@ -146,6 +146,7 @@ static void test(int *rcv_fds, int count
send_from_v4(proto);

test_fd = receive_once(epfd, proto);
+ len = sizeof(test_family);
if (getsockopt(test_fd, SOL_SOCKET, SO_DOMAIN, &test_family, &len))
error(1, errno, "failed to read socket domain");
if (test_family != AF_INET)