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d45f72b3c2
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:
<TASK>
? __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
</TASK>
Fixes: a251d6576d ("HID: uclogic: Handle wireless device reconnection")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: José Expósito <jose.exposito89@gmail.com>
Link: https://lore.kernel.org/r/20231009064245.3573397-3-ruanjinjie@huawei.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* HID driver for UC-Logic devices not fully compliant with HID standard
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*
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* Copyright (c) 2022 José Expósito <jose.exposito89@gmail.com>
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*/
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#include <kunit/test.h>
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#include "./hid-uclogic-params.h"
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#define MAX_EVENT_SIZE 12
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struct uclogic_raw_event_hook_test {
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u8 event[MAX_EVENT_SIZE];
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size_t size;
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bool expected;
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};
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static struct uclogic_raw_event_hook_test hook_events[] = {
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{
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.event = { 0xA1, 0xB2, 0xC3, 0xD4 },
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.size = 4,
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},
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{
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.event = { 0x1F, 0x2E, 0x3D, 0x4C, 0x5B, 0x6A },
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.size = 6,
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},
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};
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static struct uclogic_raw_event_hook_test test_events[] = {
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{
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.event = { 0xA1, 0xB2, 0xC3, 0xD4 },
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.size = 4,
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.expected = true,
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},
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{
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.event = { 0x1F, 0x2E, 0x3D, 0x4C, 0x5B, 0x6A },
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.size = 6,
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.expected = true,
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},
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{
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.event = { 0xA1, 0xB2, 0xC3 },
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.size = 3,
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.expected = false,
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},
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{
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.event = { 0xA1, 0xB2, 0xC3, 0xD4, 0x00 },
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.size = 5,
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.expected = false,
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},
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{
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.event = { 0x2E, 0x3D, 0x4C, 0x5B, 0x6A, 0x1F },
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.size = 6,
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.expected = false,
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},
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};
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static void fake_work(struct work_struct *work)
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{
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}
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static void hid_test_uclogic_exec_event_hook_test(struct kunit *test)
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{
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struct uclogic_params p = {0, };
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struct uclogic_raw_event_hook *filter;
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bool res;
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int n;
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/* Initialize the list of events to hook */
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p.event_hooks = kunit_kzalloc(test, sizeof(*p.event_hooks), GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, p.event_hooks);
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INIT_LIST_HEAD(&p.event_hooks->list);
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for (n = 0; n < ARRAY_SIZE(hook_events); n++) {
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filter = kunit_kzalloc(test, sizeof(*filter), GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filter);
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filter->size = hook_events[n].size;
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filter->event = kunit_kzalloc(test, filter->size, GFP_KERNEL);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filter->event);
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memcpy(filter->event, &hook_events[n].event[0], filter->size);
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INIT_WORK(&filter->work, fake_work);
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list_add_tail(&filter->list, &p.event_hooks->list);
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}
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/* Test uclogic_exec_event_hook() */
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for (n = 0; n < ARRAY_SIZE(test_events); n++) {
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res = uclogic_exec_event_hook(&p, &test_events[n].event[0],
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test_events[n].size);
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KUNIT_ASSERT_EQ(test, res, test_events[n].expected);
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}
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}
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static struct kunit_case hid_uclogic_core_test_cases[] = {
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KUNIT_CASE(hid_test_uclogic_exec_event_hook_test),
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{}
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};
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static struct kunit_suite hid_uclogic_core_test_suite = {
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.name = "hid_uclogic_core_test",
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.test_cases = hid_uclogic_core_test_cases,
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};
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kunit_test_suite(hid_uclogic_core_test_suite);
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MODULE_DESCRIPTION("KUnit tests for the UC-Logic driver");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("José Expósito <jose.exposito89@gmail.com>");
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