From patchwork Thu Sep 21 13:38:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13394155 X-Patchwork-Delegate: jikos@jikos.cz Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 29C2DE7D0A6 for ; Thu, 21 Sep 2023 17:29:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229948AbjIUR3T (ORCPT ); Thu, 21 Sep 2023 13:29:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230325AbjIUR2p (ORCPT ); Thu, 21 Sep 2023 13:28:45 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 788EF53640 for ; Thu, 21 Sep 2023 10:16:41 -0700 (PDT) Received: from kwepemi500008.china.huawei.com (unknown [172.30.72.55]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4RrxH42B1TzMlcP; Thu, 21 Sep 2023 21:35:28 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemi500008.china.huawei.com (7.221.188.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Thu, 21 Sep 2023 21:39:04 +0800 From: Jinjie Ruan To: , , , CC: Subject: [PATCH 2/2] HID: uclogic: Fix a work->entry not empty bug in __queue_work() Date: Thu, 21 Sep 2023 21:38:24 +0800 Message-ID: <20230921133824.605700-3-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230921133824.605700-1-ruanjinjie@huawei.com> References: <20230921133824.605700-1-ruanjinjie@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemi500008.china.huawei.com (7.221.188.139) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org When CONFIG_HID_UCLOGIC=y and CONFIG_KUNIT_ALL_TESTS=y, launch kernel and then the below work->entry not empty bug occurs. In hid_test_uclogic_exec_event_hook_test(), the filter->work is not initialized to be added to p.event_hooks->list, and then the schedule_work() in uclogic_exec_event_hook() will call __queue_work(), which check whether the work->entry is empty and cause the below warning call trace. So call INIT_WORK() with a fake work to solve the issue. After applying this patch, the below work->entry not empty bug never occurs. WARNING: CPU: 0 PID: 2177 at kernel/workqueue.c:1787 __queue_work.part.0+0x780/0xad0 Modules linked in: CPU: 0 PID: 2177 Comm: kunit_try_catch Tainted: G B W N 6.6.0-rc2+ #30 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:__queue_work.part.0+0x780/0xad0 Code: 44 24 20 0f b6 00 84 c0 74 08 3c 03 0f 8e 52 03 00 00 f6 83 00 01 00 00 02 74 6f 4c 89 ef e8 c7 d8 f1 02 f3 90 e9 e5 f8 ff ff <0f> 0b e9 63 fc ff ff 89 e9 49 8d 57 68 4c 89 e6 4c 89 ff 83 c9 02 RSP: 0000:ffff888102bb7ce8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff888106b8e460 RCX: ffffffff84141cc7 RDX: 1ffff11020d71c8c RSI: 0000000000000004 RDI: ffff8881001d0118 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed1020576f92 R10: 0000000000000003 R11: ffff888102bb7980 R12: ffff888106b8e458 R13: ffff888119c38800 R14: 0000000000000000 R15: ffff8881001d0100 FS: 0000000000000000(0000) GS:ffff888119c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888119506000 CR3: 0000000005286001 CR4: 0000000000770ef0 DR0: ffffffff8fdd6ce0 DR1: ffffffff8fdd6ce1 DR2: ffffffff8fdd6ce3 DR3: ffffffff8fdd6ce5 DR6: 00000000fffe0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace: ? __warn+0xc9/0x260 ? __queue_work.part.0+0x780/0xad0 ? report_bug+0x345/0x400 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x14/0x40 ? asm_exc_invalid_op+0x16/0x20 ? _raw_spin_lock+0x87/0xe0 ? __queue_work.part.0+0x780/0xad0 ? __queue_work.part.0+0x249/0xad0 queue_work_on+0x48/0x50 uclogic_exec_event_hook.isra.0+0xf7/0x160 hid_test_uclogic_exec_event_hook_test+0x2f1/0x5d0 ? try_to_wake_up+0x151/0x13e0 ? uclogic_exec_event_hook.isra.0+0x160/0x160 ? _raw_spin_lock_irqsave+0x8d/0xe0 ? __sched_text_end+0xa/0xa ? __sched_text_end+0xa/0xa ? migrate_enable+0x260/0x260 ? kunit_try_run_case_cleanup+0xe0/0xe0 kunit_generic_run_threadfn_adapter+0x4a/0x90 ? kunit_try_catch_throw+0x80/0x80 kthread+0x2b5/0x380 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x2d/0x70 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork_asm+0x11/0x20 Fixes: a251d6576d2a ("HID: uclogic: Handle wireless device reconnection") Signed-off-by: Jinjie Ruan Reviewed-by: José Expósito --- drivers/hid/hid-uclogic-core-test.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/hid/hid-uclogic-core-test.c b/drivers/hid/hid-uclogic-core-test.c index 2bb916226a38..cb274cde3ad2 100644 --- a/drivers/hid/hid-uclogic-core-test.c +++ b/drivers/hid/hid-uclogic-core-test.c @@ -56,6 +56,11 @@ static struct uclogic_raw_event_hook_test test_events[] = { }, }; +static void fake_work(struct work_struct *work) +{ + +} + static void hid_test_uclogic_exec_event_hook_test(struct kunit *test) { struct uclogic_params p = {0, }; @@ -77,6 +82,8 @@ static void hid_test_uclogic_exec_event_hook_test(struct kunit *test) KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filter->event); memcpy(filter->event, &hook_events[n].event[0], filter->size); + INIT_WORK(&filter->work, fake_work); + list_add_tail(&filter->list, &p.event_hooks->list); }