linux-kernel - [PATCH 5.15 211/262] soc: fsl: guts: Add a missing memory allocation failure check

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Message-Id: <20220307091708.839277782@linuxfoundation.org>
Date:   Mon,  7 Mar 2022 10:19:15 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tyrel Datwyler <tyreld@...ux.ibm.com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Li Yang <leoyang.li@....com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 211/262] soc: fsl: guts: Add a missing memory allocation failure check

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit b9abe942cda43a1d46a0fd96efb54f1aa909f757 ]

If 'devm_kstrdup()' fails, we should return -ENOMEM.

While at it, move the 'of_node_put()' call in the error handling path and
after the 'machine' has been copied.
Better safe than sorry.

Fixes: a6fc3b698130 ("soc: fsl: add GUTS driver for QorIQ platforms")
Depends-on: fddacc7ff4dd ("soc: fsl: guts: Revert commit 3c0d64e867ed")
Suggested-by: Tyrel Datwyler <tyreld@...ux.ibm.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Li Yang <leoyang.li@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soc/fsl/guts.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/fsl/guts.c b/drivers/soc/fsl/guts.c
index 67b079fc0c8e..75eabfb916cb 100644
--- a/drivers/soc/fsl/guts.c
+++ b/drivers/soc/fsl/guts.c
@@ -160,9 +160,14 @@ static int fsl_guts_probe(struct platform_device *pdev)
 	root = of_find_node_by_path("/");
 	if (of_property_read_string(root, "model", &machine))
 		of_property_read_string_index(root, "compatible", 0, &machine);
-	of_node_put(root);
-	if (machine)
+	if (machine) {
 		soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
+		if (!soc_dev_attr.machine) {
+			of_node_put(root);
+			return -ENOMEM;
+		}
+	}
+	of_node_put(root);
 
 	svr = fsl_guts_get_svr();
 	soc_die = fsl_soc_die_match(svr, fsl_soc_die);
-- 
2.34.1