[SRU][Q/P/N/J][PATCH 1/1] UBUNTU: SAUCE: fan: vxlan: check memory allocation for map

[Kleber Sacilotto de Souza]

BugLink: https://bugs.launchpad.net/bugs/2125053

When a new fan vxlan map is requested, the return of kmalloc() is not
checked, so it can cause a NULL pointer dereference if memory allocation
fails.

Signed-off-by: Kleber Sacilotto de Souza <kleber.souza at canonical.com>
---
 drivers/net/vxlan/vxlan_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 74353e249d90..035bb030e5fa 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -152,6 +152,9 @@ static int vxlan_fan_add_map(struct vxlan_dev *vxlan, struct ifla_fan_map *map)
 		return -EEXIST;
 
 	fan_map = kmalloc(sizeof(*fan_map), GFP_KERNEL);
+	if (!fan_map)
+		return -ENOMEM;
+
 	fan_map->underlay = map->underlay;
 	fan_map->overlay = map->overlay;
 	fan_map->underlay_prefix = map->underlay_prefix;
-- 
2.43.0