[PATCH 4.19 51/90] mdesc: fix a missing-check bug in get_vdev_port_node_info()

[Greg Kroah-Hartman]

[ Upstream commit 80caf43549e7e41a695c6d1e11066286538b336f ]

In get_vdev_port_node_info(), 'node_info->vdev_port.name' is allcoated
by kstrdup_const(), and it returns NULL when fails. So
'node_info->vdev_port.name' should be checked.

Signed-off-by: Gen Zhang <blackgod016574@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/sparc/kernel/mdesc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c
index 39a2503fa3e1..51028abe5e90 100644
--- a/arch/sparc/kernel/mdesc.c
+++ b/arch/sparc/kernel/mdesc.c
@@ -357,6 +357,8 @@ static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node,
 
 	node_info->vdev_port.id = *idp;
 	node_info->vdev_port.name = kstrdup_const(name, GFP_KERNEL);
+	if (!node_info->vdev_port.name)
+		return -1;
 	node_info->vdev_port.parent_cfg_hdl = *parent_cfg_hdlp;
 
 	return 0;
-- 
2.20.1