From 4c05c7ed880fb58790731fb53571af67b7632d87 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Tue, 16 Sep 2025 17:28:14 -0700 Subject: [PATCH] selftests: tls: test skb copy under mem pressure and OOB Add a test which triggers mem pressure via OOB writes. Reviewed-by: Sabrina Dubroca Signed-off-by: Jakub Kicinski Link: https://patch.msgid.link/20250917002814.1743558-2-kuba@kernel.org Signed-off-by: Paolo Abeni --- tools/testing/selftests/net/tls.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c index 0f5640d8dc7fb..dd093f9df6f14 100644 --- a/tools/testing/selftests/net/tls.c +++ b/tools/testing/selftests/net/tls.c @@ -2770,6 +2770,22 @@ TEST_F(tls_err, poll_partial_rec_async) } } +/* Use OOB+large send to trigger copy mode due to memory pressure. + * OOB causes a short read. + */ +TEST_F(tls_err, oob_pressure) +{ + char buf[1<<16]; + int i; + + memrnd(buf, sizeof(buf)); + + EXPECT_EQ(send(self->fd2, buf, 5, MSG_OOB), 5); + EXPECT_EQ(send(self->fd2, buf, sizeof(buf), 0), sizeof(buf)); + for (i = 0; i < 64; i++) + EXPECT_EQ(send(self->fd2, buf, 5, MSG_OOB), 5); +} + TEST(non_established) { struct tls12_crypto_info_aes_gcm_256 tls12; struct sockaddr_in addr; -- 2.47.3