diff options
| author | Pietro Borrello <borrello@diag.uniroma1.it> | 2023-02-12 00:01:44 +0000 |
|---|---|---|
| committer | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2023-02-16 12:00:26 +0100 |
| commit | b94335f899542a0da5fafc38af8edcaf90195843 (patch) | |
| tree | 603add86d7a26759bb899d978e7bd2606758ff26 /drivers | |
| parent | 76ca8da989c7d97a7f76c75d475fe95a584439d7 (diff) | |
hid: bigben_probe(): validate report count
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@diag.uniroma1.it>
Link: https://lore.kernel.org/r/20230211-bigben-oob-v1-1-d2849688594c@diag.uniroma1.it
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hid/hid-bigbenff.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/hid/hid-bigbenff.c b/drivers/hid/hid-bigbenff.c index 9d6560db762b..a02cb517b4c4 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"); |