[PATCH 4/7] net: mctp: usblib: Complete rx tests
From: James Lee <hidden>
Date: 2026-08-31 03:50:24
Also in:
linux-hardening, lkml
Subsystem:
management component transport protocol (mctp), networking drivers, the rest · Maintainers:
Jeremy Kerr, Matt Johnston, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add rx tests without spanning, covering cases where a packet is shorter than allowed without spanning, isn't completed within one submission. Fully cover rx functions except for memory allocation failures and trivial functions. Signed-off-by: James Lee <redacted> --- drivers/net/mctp/mctp-usblib-test.c | 62 +++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+)
diff --git a/drivers/net/mctp/mctp-usblib-test.c b/drivers/net/mctp/mctp-usblib-test.c
index 4f499de9a6ce4452dcc71ac38fa26b6595977f77..ab323a31161a415d93eafe4314e0e52cedfcd42e 100644
--- a/drivers/net/mctp/mctp-usblib-test.c
+++ b/drivers/net/mctp/mctp-usblib-test.c@@ -524,6 +524,66 @@ static void mctp_usblib_test_rx_invalid_dmtf_id(struct kunit *test) KUNIT_EXPECT_EQ(test, dev->rx_pkts.qlen, 0); } +static void mctp_usblib_test_rx_nonspanning_tiny(struct kunit *test) +{ + struct mctp_usblib_test_dev *dev; + struct mctp_usblib_test_ctx *ctx; + struct mctp_usblib_rx *rx; + size_t len, buflen; + u8 pktbuf[3]; + void *buf; + int rc; + + ctx = mctp_usblib_test_init(test); + rx = mctp_usblib_test_rx_init(test, false); + dev = ctx->dev; + + len = sizeof(pktbuf); + mctp_usblib_test_init_pkt(pktbuf, len, len); + + buflen = 0; + rc = mctp_usblib_rx_prepare(dev->ndev, rx, &buf, &buflen, GFP_KERNEL); + KUNIT_ASSERT_EQ(test, rc, 0); + KUNIT_ASSERT_GE(test, buflen, len); + + memcpy(buf, pktbuf, len); + + rc = mctp_usblib_rx_complete(dev->ndev, rx, len); + KUNIT_EXPECT_EQ(test, rc, -ENOMSG); + KUNIT_EXPECT_NULL(test, rx->skb); + KUNIT_EXPECT_EQ(test, dev->rx_pkts.qlen, 0); +} + +static void mctp_usblib_test_rx_nonspanning_partial(struct kunit *test) +{ + struct mctp_usblib_test_dev *dev; + struct mctp_usblib_test_ctx *ctx; + struct mctp_usblib_rx *rx; + size_t len, buflen; + u8 pktbuf[20]; + void *buf; + int rc; + + ctx = mctp_usblib_test_init(test); + rx = mctp_usblib_test_rx_init(test, false); + dev = ctx->dev; + + len = sizeof(pktbuf); + mctp_usblib_test_init_pkt(pktbuf, len, len + 1); + + buflen = 0; + rc = mctp_usblib_rx_prepare(dev->ndev, rx, &buf, &buflen, GFP_KERNEL); + KUNIT_ASSERT_EQ(test, rc, 0); + KUNIT_ASSERT_GE(test, buflen, len); + + memcpy(buf, pktbuf, len); + + rc = mctp_usblib_rx_complete(dev->ndev, rx, len); + KUNIT_EXPECT_EQ(test, rc, -EPROTO); + KUNIT_EXPECT_NULL(test, rx->skb); + KUNIT_EXPECT_EQ(test, dev->rx_pkts.qlen, 0); +} + static struct kunit_case mctp_usblib_test_cases[] = { KUNIT_CASE(mctp_usblib_test_rx_single), KUNIT_CASE_PARAM(mctp_usblib_test_rx_pkt_span,
@@ -531,6 +591,8 @@ static struct kunit_case mctp_usblib_test_cases[] = { KUNIT_CASE(mctp_usblib_test_rx_header_splits), KUNIT_CASE(mctp_usblib_test_rx_short_packet), KUNIT_CASE(mctp_usblib_test_rx_invalid_dmtf_id), + KUNIT_CASE(mctp_usblib_test_rx_nonspanning_tiny), + KUNIT_CASE(mctp_usblib_test_rx_nonspanning_partial), {} };
--
2.47.3