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HID: check empty report_list in bigben_probe()

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[ Upstream commit c7bf714f87 ]

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: 256a90ed9e ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pietro Borrello 2023-01-16 11:11:25 +00:00 • committed by Greg Kroah-Hartman
commit 20fd459876
1 changed files with 5 additions and 0 deletions
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5
drivers/hid/hid-bigbenff.c
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@ -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);