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selftests: tls: check that disconnect does nothing

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"Inspired" by syzbot test, pre-queue some data, disconnect()
and try to receive(). This used to trigger a warning in TLS's strp.
Now we expect the disconnect() to have almost no effect.

Link: https://lore.kernel.org/67e6be74.050a0220.2f068f.007e.GAE@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://patch.msgid.link/20250404180334.3224206-2-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Jakub Kicinski
2025-04-08 11:38:49 +02:00
committed by Paolo Abeni
parent 5071a1e606
commit a1328a671e
1 changed files with 36 additions and 0 deletions
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tools/testing/selftests/net/tls.c
+36
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@@ -1753,6 +1753,42 @@ TEST_F(tls_basic, rekey_tx)
EXPECT_EQ(memcmp(buf, test_str, send_len), 0);
}
TEST_F(tls_basic, disconnect)
{
char const *test_str = "test_message";
int send_len = strlen(test_str) + 1;
struct tls_crypto_info_keys key;
struct sockaddr_in addr;
char buf[20];
int ret;
if (self->notls)
return;
tls_crypto_info_init(TLS_1_3_VERSION, TLS_CIPHER_AES_GCM_128,
&key, 0);
ret = setsockopt(self->fd, SOL_TLS, TLS_TX, &key, key.len);
ASSERT_EQ(ret, 0);
/* Pre-queue the data so that setsockopt parses it but doesn't
* dequeue it from the TCP socket. recvmsg would dequeue.
*/
EXPECT_EQ(send(self->fd, test_str, send_len, 0), send_len);
ret = setsockopt(self->cfd, SOL_TLS, TLS_RX, &key, key.len);
ASSERT_EQ(ret, 0);
addr.sin_family = AF_UNSPEC;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = 0;
ret = connect(self->cfd, &addr, sizeof(addr));
EXPECT_EQ(ret, -1);
EXPECT_EQ(errno, EOPNOTSUPP);
EXPECT_EQ(recv(self->cfd, buf, send_len, 0), send_len);
}
TEST_F(tls, rekey)
{
char const *test_str_1 = "test_message_before_rekey";