This is a note to let you know that I've just added the patch titled hid: bigben_probe(): validate report count to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: hid-bigben_probe-validate-report-count.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 35af33f08e05236396b8b7bf11a83af3440285db Author: Pietro Borrello <borrello@xxxxxxxxxxxxxxxx> Date: Sun Feb 12 00:01:44 2023 +0000 hid: bigben_probe(): validate report count [ Upstream commit b94335f899542a0da5fafc38af8edcaf90195843 ] bigben_probe() does not validate that the output report has the needed report values in the first field. A malicious device registering a report with one field and a single value causes an head OOB write in bigben_worker() when accessing report_field->value[1] to report_field->value[7]. Use hid_validate_values() which takes care of all the needed checks. Fixes: 256a90ed9e46 ("HID: hid-bigbenff: driver for BigBen Interactive PS3OFMINIPAD gamepad") Signed-off-by: Pietro Borrello <borrello@xxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230211-bigben-oob-v1-1-d2849688594c@xxxxxxxxxxxxxxxx Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/hid/hid-bigbenff.c b/drivers/hid/hid-bigbenff.c index 9d6560db762b1..a02cb517b4c47 100644 --- a/drivers/hid/hid-bigbenff.c +++ b/drivers/hid/hid-bigbenff.c @@ -371,7 +371,6 @@ static int bigben_probe(struct hid_device *hid, { struct bigben_device *bigben; struct hid_input *hidinput; - struct list_head *report_list; struct led_classdev *led; char *name; size_t name_sz; @@ -396,14 +395,12 @@ static int bigben_probe(struct hid_device *hid, return error; } - report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; - if (list_empty(report_list)) { + bigben->report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 8); + if (!bigben->report) { hid_err(hid, "no output report found\n"); error = -ENODEV; goto error_hw_stop; } - bigben->report = list_entry(report_list->next, - struct hid_report, list); if (list_empty(&hid->inputs)) { hid_err(hid, "no inputs found\n");