[PATCH AUTOSEL 4.14 14/27] mdesc: fix a missing-check bug in get_vdev_port_node_info()

From: Sasha Levin
Date: Fri Jun 14 2019 - 16:35:21 EST


From: Gen Zhang <blackgod016574@xxxxxxxxx>

[ 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 1ef6156b1530..8f24f3d60b8c 100644
--- 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;
--
2.20.1