From: Linkai Gong <gonglinkai@kylinos.cn>
To: Linus Walleij <linusw@kernel.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: "Alistair Francis" <alistair@alistair23.me>,
"Maxime Ripard" <mripard@kernel.org>,
"Mylène Josserand" <mylene.josserand@bootlin.com>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
gonglinkai@kylinos.cn
Subject: [PATCH] Input: cyttsp5 - clamp the HID report size before memcpy
Date: Tue, 1 Sep 2026 20:26:49 +0800 [thread overview]
Message-ID: <20260901122649.1173066-1-gonglinkai@kylinos.cn> (raw)
The size field comes from the device and is used as the memcpy()
length into response_buf, which is CY_MAX_INPUT bytes.
Fixes: 5b0c03e24a06 ("Input: Add driver for Cypress Generation 5 touchscreen")
Signed-off-by: Linkai Gong <gonglinkai@kylinos.cn>
---
drivers/input/touchscreen/cyttsp5.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/input/touchscreen/cyttsp5.c b/drivers/input/touchscreen/cyttsp5.c
index 9266c07314be..e878a02dc9b7 100644
--- a/drivers/input/touchscreen/cyttsp5.c
+++ b/drivers/input/touchscreen/cyttsp5.c
@@ -710,6 +710,7 @@ static irqreturn_t cyttsp5_handle_irq(int irq, void *handle)
size = 2;
} else {
report_id = ts->input_buf[2];
+ size = min(size, CY_MAX_INPUT);
}
switch (report_id) {
--
2.25.1
next reply other threads:[~2026-09-01 12:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 12:26 Linkai Gong [this message]
2026-09-01 12:40 ` [PATCH] Input: cyttsp5 - clamp the HID report size before memcpy sashiko-bot
2026-09-04 10:31 ` Alistair
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