From: Danny Kaehn danny.kaehn@plexus.com
stable inclusion from stable-v5.15.139 commit df0daac2709473531d6a3472997cc65301ac06d6 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RFR6 CVE: CVE-2023-52853
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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Previously the cp2112 driver called INIT_DELAYED_WORK within cp2112_gpio_irq_startup, resulting in duplicate initilizations of the workqueue on subsequent IRQ startups following an initial request. This resulted in a warning in set_work_data in workqueue.c, as well as a rare NULL dereference within process_one_work in workqueue.c.
Initialize the workqueue within _probe instead.
Fixes: 13de9cca514e ("HID: cp2112: add IRQ chip handling") Signed-off-by: Danny Kaehn danny.kaehn@plexus.com Signed-off-by: Jiri Kosina jkosina@suse.cz
Conflicts: drivers/hid/hid-cp2112.c [Fix context] Signed-off-by: Yuan Can yuancan@huawei.com --- drivers/hid/hid-cp2112.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c index 172f20e88c6c..966504eea1bc 100644 --- a/drivers/hid/hid-cp2112.c +++ b/drivers/hid/hid-cp2112.c @@ -1157,8 +1157,6 @@ static unsigned int cp2112_gpio_irq_startup(struct irq_data *d) struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct cp2112_device *dev = gpiochip_get_data(gc);
- INIT_DELAYED_WORK(&dev->gpio_poll_worker, cp2112_gpio_poll_callback); - if (!dev->gpio_poll) { dev->gpio_poll = true; schedule_delayed_work(&dev->gpio_poll_worker, 0); @@ -1353,6 +1351,8 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id) girq->default_type = IRQ_TYPE_NONE; girq->handler = handle_simple_irq;
+ INIT_DELAYED_WORK(&dev->gpio_poll_worker, cp2112_gpio_poll_callback); + ret = gpiochip_add_data(&dev->gc, dev); if (ret < 0) { hid_err(hdev, "error registering gpio chip\n");