diff options
| author | Minjong Kim <minbell.kim@samsung.com> | 2025-08-13 19:30:22 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-04 15:31:53 +0200 |
| commit | 98520a9a3d69a530dd1ee280cbe0abc232a35bff (patch) | |
| tree | ac99f27667b19eb50fc4f9df086758aedc3dcdaa | |
| parent | 82e721413565da4871f96497de6944af0794c0af (diff) | |
HID: hid-ntrig: fix unable to handle page fault in ntrig_report_version()
commit 185c926283da67a72df20a63a5046b3b4631b7d9 upstream.
in ntrig_report_version(), hdev parameter passed from hid_probe().
sending descriptor to /dev/uhid can make hdev->dev.parent->parent to null
if hdev->dev.parent->parent is null, usb_dev has
invalid address(0xffffffffffffff58) that hid_to_usb_dev(hdev) returned
when usb_rcvctrlpipe() use usb_dev,it trigger
page fault error for address(0xffffffffffffff58)
add null check logic to ntrig_report_version()
before calling hid_to_usb_dev()
Signed-off-by: Minjong Kim <minbell.kim@samsung.com>
Link: https://patch.msgid.link/20250813-hid-ntrig-page-fault-fix-v2-1-f98581f35106@samsung.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hid/hid-ntrig.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c index 2738ce947434..0f76e241e0af 100644 --- a/drivers/hid/hid-ntrig.c +++ b/drivers/hid/hid-ntrig.c @@ -144,6 +144,9 @@ static void ntrig_report_version(struct hid_device *hdev) struct usb_device *usb_dev = hid_to_usb_dev(hdev); unsigned char *data = kmalloc(8, GFP_KERNEL); + if (!hid_is_usb(hdev)) + return; + if (!data) goto err_free; |