diff options
| author | Pietro Borrello <borrello@diag.uniroma1.it> | 2023-01-16 14:11:25 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2023-01-17 15:09:59 +0300 |
| commit | c7bf714f875531f227f2ef1fdcc8f4d44e7c7d9d (patch) | |
| tree | 5748382215194e82a34c9fece405dae306d1eaec | |
| parent | b12fece4c64857e5fab4290bf01b2e0317a88456 (diff) | |
| download | linux-c7bf714f875531f227f2ef1fdcc8f4d44e7c7d9d.tar.xz | |
HID: check empty report_list in bigben_probe()
Add a check for empty report_list in bigben_probe().
The missing check causes a type confusion when issuing a list_entry()
on an empty report_list.
The problem is caused by the assumption that the device must
have valid report_list. While this will be true for all normal HID
devices, a suitably malicious device can violate the assumption.
Fixes: 256a90ed9e46 ("HID: hid-bigbenff: driver for BigBen Interactive PS3OFMINIPAD gamepad")
Signed-off-by: Pietro Borrello <borrello@diag.uniroma1.it>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/hid-bigbenff.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/hid/hid-bigbenff.c b/drivers/hid/hid-bigbenff.c index e8c5e3ac9fff..e8b16665860d 100644 --- a/drivers/hid/hid-bigbenff.c +++ b/drivers/hid/hid-bigbenff.c @@ -344,6 +344,11 @@ static int bigben_probe(struct hid_device *hid, } report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; + if (list_empty(report_list)) { + 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); |