[PATCH v2] soc: loongson: loongson2_guts: Add check for devm_kstrdup()

[Haoxiang Li]

Add check for the return value of devm_kstrdup() in
loongson2_guts_probe() to catch potential exception.

Fixes: b82621ac8450 ("soc: loongson: add GUTS driver for loongson-2 platforms")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Haoxiang Li <haoxiang_li2024@xxxxxxx>
---
Changes in v2:
- modify the check position. Thanks, Binbin!
- modify the title description.
---
 drivers/soc/loongson/loongson2_guts.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/loongson/loongson2_guts.c b/drivers/soc/loongson/loongson2_guts.c
index ae42e3a9127f..16913c3ef65c 100644
--- a/drivers/soc/loongson/loongson2_guts.c
+++ b/drivers/soc/loongson/loongson2_guts.c
@@ -114,8 +114,11 @@ static int loongson2_guts_probe(struct platform_device *pdev)
 	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)
+			return -ENOMEM;
+	}
 
 	svr = loongson2_guts_get_svr();
 	soc_die = loongson2_soc_die_match(svr, loongson2_soc_die);
-- 
2.25.1