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From:   williamsukatube@163.com
To:     dvorkin@tibbo.com, wellslutw@gmail.com, linus.walleij@linaro.org,
        linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
        linux-kernel@vger.kernel.org
Cc:     William Dean <williamsukatube@gmail.com>,
        Hacash Robot <hacashRobot@santino.com>
Subject: [PATCH] pinctrl: Add check for kcalloc
Date:   Sun, 10 Jul 2022 23:48:22 +0800
Message-Id: <20220710154822.2610801-1-williamsukatube@163.com>
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From: William Dean <williamsukatube@gmail.com>

As the potential failure of the kcalloc(),
it should be better to check it in order to
avoid the dereference of the NULL pointer.

Fixes: aa74c44be19c8 ("pinctrl: Add driver for Sunplus SP7021")
Reported-by: Hacash Robot <hacashRobot@santino.com>
Signed-off-by: William Dean <williamsukatube@gmail.com>
---
 drivers/pinctrl/sunplus/sppctl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pinctrl/sunplus/sppctl.c b/drivers/pinctrl/sunplus/sppctl.c
index 3ba47040ac42..2b3335ab56c6 100644
--- a/drivers/pinctrl/sunplus/sppctl.c
+++ b/drivers/pinctrl/sunplus/sppctl.c
@@ -871,6 +871,9 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node
 	}
 
 	*map = kcalloc(*num_maps + nmG, sizeof(**map), GFP_KERNEL);
+	if (*map == NULL)
+		return -ENOMEM;
+
 	for (i = 0; i < (*num_maps); i++) {
 		dt_pin = be32_to_cpu(list[i]);
 		pin_num = FIELD_GET(GENMASK(31, 24), dt_pin);
-- 
2.25.1