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[68.48.65.54]) by smtp.gmail.com with ESMTPSA id af79cd13be357-92ee5d68e5fsm464578285a.43.2026.07.11.08.06.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Jul 2026 08:06:14 -0700 (PDT) From: Michael Bommarito To: Miri Korenblit , Johannes Berg Cc: Emmanuel Grumbach , Benjamin Berg , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 2/2] wifi: iwlwifi: mvm: add KUnit coverage for BA-window station ID bounds Date: Sat, 11 Jul 2026 11:06:11 -0400 Message-ID: <20260711150611.2913332-3-michael.bommarito@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260711150611.2913332-1-michael.bommarito@gmail.com> References: <20260711150611.2913332-1-michael.bommarito@gmail.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Add KUnit coverage for a malformed BA-window notification carrying an out-of-range station ID, plus a valid-ID/null-station path to exercise the adjacent non-bug branch. With UBSAN bounds enabled, the malformed case reports an array-index-out-of-bounds splat before the fix and passes after it. Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Michael Bommarito --- .../wireless/intel/iwlwifi/mvm/tests/Makefile | 2 +- .../intel/iwlwifi/mvm/tests/window-status.c | 77 +++++++++++++++++++ 2 files changed, 78 insertions(+), 1 deletion(-) create mode 100644 drivers/net/wireless/intel/iwlwifi/mvm/tests/window-status.c diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tests/Makefile b/drivers/net/wireless/intel/iwlwifi/mvm/tests/Makefile index 2267be4cfb441..bf22750fceafc 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tests/Makefile +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tests/Makefile @@ -1,3 +1,3 @@ -iwlmvm-tests-y += module.o hcmd.o +iwlmvm-tests-y += module.o hcmd.o window-status.o obj-$(CONFIG_IWLWIFI_KUNIT_TESTS) += iwlmvm-tests.o diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tests/window-status.c b/drivers/net/wireless/intel/iwlwifi/mvm/tests/window-status.c new file mode 100644 index 0000000000000..06807e2bdbc12 --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tests/window-status.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * KUnit tests for MVM BA window status notification handling + */ +#include +#include + +#include +#include "../fw-api.h" +#include "../mvm.h" + +MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING"); + +static void iwl_mvm_test_window_status(struct kunit *test, u8 sta_id) +{ + struct iwl_ba_window_status_notif notif = {}; + struct iwl_rx_cmd_buffer rxb = { + ._offset = 0, + ._rx_page_order = 0, + }; + struct iwl_rx_packet *pkt; + struct iwl_fw *fw; + struct iwl_mvm *mvm; + u16 ratid; + + BUILD_BUG_ON((IWL_STATION_COUNT_MAX + 1) > + (BA_WINDOW_STATUS_STA_ID_MSK >> + BA_WINDOW_STATUS_STA_ID_POS)); + + mvm = kunit_kzalloc(test, sizeof(*mvm), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, mvm); + + fw = kunit_kzalloc(test, sizeof(*fw), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, fw); + fw->ucode_capa.num_stations = IWL_STATION_COUNT_MAX; + mvm->fw = fw; + + rxb._page = alloc_page(GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, rxb._page); + + ratid = BA_WINDOW_STATUS_VALID_MSK | + (sta_id << BA_WINDOW_STATUS_STA_ID_POS); + notif.ra_tid[0] = cpu_to_le16(ratid); + notif.mpdu_rx_count[0] = cpu_to_le16(1); + + pkt = rxb_addr(&rxb); + memset(pkt, 0, PAGE_SIZE); + pkt->len_n_flags = cpu_to_le32(sizeof(pkt->hdr) + sizeof(notif)); + memcpy(pkt->data, ¬if, sizeof(notif)); + + iwl_mvm_window_status_notif(mvm, &rxb); + + __free_page(rxb._page); +} + +static void test_ba_window_status_station_id_bounds(struct kunit *test) +{ + iwl_mvm_test_window_status(test, IWL_STATION_COUNT_MAX + 1); +} + +static void test_ba_window_status_valid_empty_station(struct kunit *test) +{ + iwl_mvm_test_window_status(test, 0); +} + +static struct kunit_case window_status_cases[] = { + KUNIT_CASE(test_ba_window_status_station_id_bounds), + KUNIT_CASE(test_ba_window_status_valid_empty_station), + {}, +}; + +static struct kunit_suite window_status = { + .name = "iwlmvm-window-status", + .test_cases = window_status_cases, +}; + +kunit_test_suite(window_status); -- 2.53.0