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selftests/net: Add sk_bind_sendto_listen and sk_connect_zero_addr

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This patch adds 2 new tests: sk_bind_sendto_listen and
sk_connect_zero_addr.

The sk_bind_sendto_listen test exercises the path where a socket's
rcv saddr changes after it has been added to the binding tables,
and then a listen() on the socket is invoked. The listen() should
succeed.

The sk_bind_sendto_listen test is copied over from one of syzbot's
tests: https://syzkaller.appspot.com/x/repro.c?x=1673a38df00000

The sk_connect_zero_addr test exercises the path where the socket was
never previously added to the binding tables and it gets assigned a
saddr upon a connect() to address 0.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Joanne Koong 2022-08-22 11:10:23 -07:00 committed by Jakub Kicinski
parent c35ecb95c4
commit 1be9ac87a7
4 changed files with 146 additions and 0 deletions
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2
tools/testing/selftests/net/.gitignore vendored
View File

@ -41,3 +41,5 @@ cmsg_sender
unix_connect
tap
bind_bhash
sk_bind_sendto_listen
sk_connect_zero_addr

2
tools/testing/selftests/net/Makefile
View File

@ -66,6 +66,8 @@ TEST_GEN_FILES += stress_reuseport_listen
TEST_PROGS += test_vxlan_vnifiltering.sh
TEST_GEN_FILES += io_uring_zerocopy_tx
TEST_GEN_FILES += bind_bhash
TEST_GEN_PROGS += sk_bind_sendto_listen
TEST_GEN_PROGS += sk_connect_zero_addr
TEST_FILES := settings

80
tools/testing/selftests/net/sk_bind_sendto_listen.c Normal file
View File

@ -0,0 +1,80 @@
// SPDX-License-Identifier: GPL-2.0
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <unistd.h>
int main(void)
{
int fd1, fd2, one = 1;
struct sockaddr_in6 bind_addr = {
.sin6_family = AF_INET6,
.sin6_port = htons(20000),
.sin6_flowinfo = htonl(0),
.sin6_addr = {},
.sin6_scope_id = 0,
};
inet_pton(AF_INET6, "::", &bind_addr.sin6_addr);
fd1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd1 < 0) {
error(1, errno, "socket fd1");
return -1;
}
if (setsockopt(fd1, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
error(1, errno, "setsockopt(SO_REUSEADDR) fd1");
goto out_err1;
}
if (bind(fd1, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd1");
goto out_err1;
}
if (sendto(fd1, NULL, 0, MSG_FASTOPEN, (struct sockaddr *)&bind_addr,
sizeof(bind_addr))) {
error(1, errno, "sendto fd1");
goto out_err1;
}
fd2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd2 < 0) {
error(1, errno, "socket fd2");
goto out_err1;
}
if (setsockopt(fd2, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
error(1, errno, "setsockopt(SO_REUSEADDR) fd2");
goto out_err2;
}
if (bind(fd2, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd2");
goto out_err2;
}
if (sendto(fd2, NULL, 0, MSG_FASTOPEN, (struct sockaddr *)&bind_addr,
sizeof(bind_addr)) != -1) {
error(1, errno, "sendto fd2");
goto out_err2;
}
if (listen(fd2, 0)) {
error(1, errno, "listen");
goto out_err2;
}
close(fd2);
close(fd1);
return 0;
out_err2:
close(fd2);
out_err1:
close(fd1);
return -1;
}

62
tools/testing/selftests/net/sk_connect_zero_addr.c Normal file
View File

@ -0,0 +1,62 @@
// SPDX-License-Identifier: GPL-2.0
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <unistd.h>
int main(void)
{
int fd1, fd2, one = 1;
struct sockaddr_in6 bind_addr = {
.sin6_family = AF_INET6,
.sin6_port = htons(20000),
.sin6_flowinfo = htonl(0),
.sin6_addr = {},
.sin6_scope_id = 0,
};
inet_pton(AF_INET6, "::", &bind_addr.sin6_addr);
fd1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd1 < 0) {
error(1, errno, "socket fd1");
return -1;
}
if (setsockopt(fd1, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
error(1, errno, "setsockopt(SO_REUSEADDR) fd1");
goto out_err1;
}
if (bind(fd1, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd1");
goto out_err1;
}
if (listen(fd1, 0)) {
error(1, errno, "listen");
goto out_err1;
}
fd2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd2 < 0) {
error(1, errno, "socket fd2");
goto out_err1;
}
if (connect(fd2, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd2");
goto out_err2;
}
close(fd2);
close(fd1);
return 0;
out_err2:
close(fd2);
out_err1:
close(fd1);
return -1;
}