linux-kernel - [PATCH AUTOSEL 4.19 1/9] HID: uhid: Over-ride the default maximum data buffer value with our own

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Message-Id: <20230320005707.1429405-1-sashal@kernel.org>
Date:   Sun, 19 Mar 2023 20:56:59 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Lee Jones <lee@...nel.org>, Jiri Kosina <jkosina@...e.cz>,
        Sasha Levin <sashal@...nel.org>, david.rheinsberg@...il.com,
        jikos@...nel.org, benjamin.tissoires@...hat.com,
        linux-input@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 1/9] HID: uhid: Over-ride the default maximum data buffer value with our own

From: Lee Jones <lee@...nel.org>

[ Upstream commit 1c5d4221240a233df2440fe75c881465cdf8da07 ]

The default maximum data buffer size for this interface is UHID_DATA_MAX
(4k).  When data buffers are being processed, ensure this value is used
when ensuring the sanity, rather than a value between the user provided
value and HID_MAX_BUFFER_SIZE (16k).

Signed-off-by: Lee Jones <lee@...nel.org>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hid/uhid.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index e128b9ce156df..44df81d56d9ca 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -398,6 +398,7 @@ struct hid_ll_driver uhid_hid_driver = {
 	.parse = uhid_hid_parse,
 	.raw_request = uhid_hid_raw_request,
 	.output_report = uhid_hid_output_report,
+	.max_buffer_size = UHID_DATA_MAX,
 };
 EXPORT_SYMBOL_GPL(uhid_hid_driver);
 
-- 
2.39.2