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HID: hid-ntrig: fix unable to handle page fault in ntrig_report_version()

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commit 185c926283 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>
This commit is contained in:
Minjong Kim 2025-08-13 19:30:22 +09:00 committed by Greg Kroah-Hartman
parent b9166ea27d
commit e422370e6a
1 changed files with 3 additions and 0 deletions
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3
drivers/hid/hid-ntrig.c
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@ -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;