From: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
To: Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <garsilva@embeddedor.com>
Subject: [PATCH] regulator: qcom_rpm-regulator: add NULL check on of_match_device() return value
Date: Fri, 7 Jul 2017 00:29:58 -0500 [thread overview]
Message-ID: <20170707052958.GA8776@embeddedgus> (raw)
Check return value from call to of_match_device()
in order to prevent a NULL pointer dereference.
In case of NULL print error message and return.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
---
drivers/regulator/qcom_rpm-regulator.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/regulator/qcom_rpm-regulator.c b/drivers/regulator/qcom_rpm-regulator.c
index 1b2acc4..88dc0b0 100644
--- a/drivers/regulator/qcom_rpm-regulator.c
+++ b/drivers/regulator/qcom_rpm-regulator.c
@@ -959,6 +959,11 @@ static int rpm_reg_probe(struct platform_device *pdev)
}
match = of_match_device(rpm_of_match, &pdev->dev);
+ if (!match) {
+ dev_err(&pdev->dev, "failed to match device\n");
+ return -ENODEV;
+ }
+
for (reg = match->data; reg->name; reg++) {
vreg = devm_kmalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
if (!vreg)
--
2.5.0
reply other threads:[~2017-07-07 5:30 UTC|newest]
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