Messages in this thread Patch in this message | | | From | Ma Ke <> | Subject | [PATCH] HID: holtek: fix slab-out-of-bounds Write in holtek_kbd_input_event | Date | Mon, 18 Sep 2023 10:40:59 +0800 |
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There is a slab-out-of-bounds Write bug in hid-holtek-kbd driver. The problem is the driver assumes the device must have an input but some malicious devices violate this assumption.
Fix this by checking hid_device's input is non-empty before its usage.
Signed-off-by: Ma Ke <make_ruc2021@163.com> --- drivers/hid/hid-holtek-kbd.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/hid/hid-holtek-kbd.c b/drivers/hid/hid-holtek-kbd.c index 403506b9697e..b346d68a06f5 100644 --- a/drivers/hid/hid-holtek-kbd.c +++ b/drivers/hid/hid-holtek-kbd.c @@ -130,6 +130,10 @@ static int holtek_kbd_input_event(struct input_dev *dev, unsigned int type, return -ENODEV; boot_hid = usb_get_intfdata(boot_interface); + if (list_empty(&boot_hid->inputs)) { + hid_err(hid, "no inputs found\n"); + return -ENODEV; + } boot_hid_input = list_first_entry(&boot_hid->inputs, struct hid_input, list); -- 2.37.2
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