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HID: alps: fix NULL pointer dereference in alps_raw_event()

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Commit ecfa6f3449 ("HID: Add HID_CLAIMED_INPUT guards in raw_event
callbacks missing them") attempted to fix up the HID drivers that had
missed the previous fix that was done in 2ff5baa9b5 ("HID: appleir:
Fix potential NULL dereference at raw event handle"), but the alps
driver was missed.

Fix this up by properly checking in the hid-alps driver that it had been
claimed correctly before attempting to process the raw event.

Fixes: 73196ebe13 ("HID: alps: add support for Alps T4 Touchpad device")
Cc: stable <stable@kernel.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <bentiss@kernel.org>
Cc: Masaki Ota <masaki.ota@jp.alps.com>
Cc: linux-input@vger.kernel.org
Assisted-by: gregkh_clanker_t1000
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Greg Kroah-Hartman 2026-04-06 16:03:25 +02:00 committed by Jiri Kosina
parent b6a5791285
commit 1badfc4319
1 changed files with 3 additions and 0 deletions
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3
drivers/hid/hid-alps.c
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@ -437,6 +437,9 @@ static int alps_raw_event(struct hid_device *hdev,
int ret = 0;
struct alps_dev *hdata = hid_get_drvdata(hdev);
if (!(hdev->claimed & HID_CLAIMED_INPUT) || !hdata->input)
return 0;
switch (hdev->product) {
case HID_PRODUCT_ID_T4_BTNLESS:
ret = t4_raw_event(hdata, data, size);