linux-kernel - [RFT PATCH v2 2/2] memory: fsl_ifc: fix leak of private memory on probe failure

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Message-Id: <20210527154322.81253-2-krzysztof.kozlowski@canonical.com>
Date:   Thu, 27 May 2021 11:43:22 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Liu Shuo <b35362@...escale.com>,
        Prabhakar Kushwaha <prabhakar@...escale.com>,
        Li Yang <leoyang.li@....com>,
        Dipen Dudhat <Dipen.Dudhat@...escale.com>,
        linux-kernel@...r.kernel.org
Cc:     Dan Carpenter <dan.carpenter@...cle.com>
Subject: [RFT PATCH v2 2/2] memory: fsl_ifc: fix leak of private memory on probe failure

On probe error the driver should free the memory allocated for private
structure.  Fix this by using resource-managed allocation.

Fixes: a20cbdeffce2 ("powerpc/fsl: Add support for Integrated Flash Controller")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>

---

Only build tested.

Changes since v1:
1. kfree() in remove() as pointed out by Dan.
---
 drivers/memory/fsl_ifc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/memory/fsl_ifc.c b/drivers/memory/fsl_ifc.c
index a6324044a085..d062c2f8250f 100644
--- a/drivers/memory/fsl_ifc.c
+++ b/drivers/memory/fsl_ifc.c
@@ -97,7 +97,6 @@ static int fsl_ifc_ctrl_remove(struct platform_device *dev)
 	iounmap(ctrl->gregs);
 
 	dev_set_drvdata(&dev->dev, NULL);
-	kfree(ctrl);
 
 	return 0;
 }
@@ -209,7 +208,8 @@ static int fsl_ifc_ctrl_probe(struct platform_device *dev)
 
 	dev_info(&dev->dev, "Freescale Integrated Flash Controller\n");
 
-	fsl_ifc_ctrl_dev = kzalloc(sizeof(*fsl_ifc_ctrl_dev), GFP_KERNEL);
+	fsl_ifc_ctrl_dev = devm_kzalloc(&dev->dev, sizeof(*fsl_ifc_ctrl_dev),
+					GFP_KERNEL);
 	if (!fsl_ifc_ctrl_dev)
 		return -ENOMEM;
 
-- 
2.27.0