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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Hacash Robot <hacashRobot@santino.com>,
        Xie Shaowen <studentxswpy@163.com>,
        Helge Deller <deller@gmx.de>
Subject: [PATCH 5.18 0977/1095] Input: gscps2 - check return value of ioremap() in gscps2_probe()
Date:   Mon, 15 Aug 2022 20:06:16 +0200
Message-Id: <20220815180509.534782564@linuxfoundation.org>
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From: Xie Shaowen <studentxswpy@163.com>

commit e61b3125a4f036b3c6b87ffd656fc1ab00440ae9 upstream.

The function ioremap() in gscps2_probe() can fail, so
its return value should be checked.

Fixes: 4bdc0d676a643 ("remove ioremap_nocache and devm_ioremap_nocache")
Cc: <stable@vger.kernel.org> # v5.6+
Reported-by: Hacash Robot <hacashRobot@santino.com>
Signed-off-by: Xie Shaowen <studentxswpy@163.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/input/serio/gscps2.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/input/serio/gscps2.c
+++ b/drivers/input/serio/gscps2.c
@@ -350,6 +350,10 @@ static int __init gscps2_probe(struct pa
 	ps2port->port = serio;
 	ps2port->padev = dev;
 	ps2port->addr = ioremap(hpa, GSC_STATUS + 4);
+	if (!ps2port->addr) {
+		ret = -ENOMEM;
+		goto fail_nomem;
+	}
 	spin_lock_init(&ps2port->lock);
 
 	gscps2_reset(ps2port);