mdesc: fix a missing-check bug in get_vdev_port_node_info()

[ 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@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c
index 1ef6156b15305d40dc8382b4fabb6af974d8a01b..8f24f3d60b8c571d3738f9edd70aa3fadc058cef 100644 (file)
--- a/arch/sparc/kernel/mdesc.c
+++ b/arch/sparc/kernel/mdesc.c
@@ -355,6 +355,8 @@ 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;