[PATCH 4.14 069/148] vxlan: check return value of gro_cells_init()

From: Greg Kroah-Hartman
Date: Wed Apr 01 2020 - 12:43:30 EST


From: Taehee Yoo <ap420073@xxxxxxxxx>

[ Upstream commit 384d91c267e621e0926062cfb3f20cb72dc16928 ]

gro_cells_init() returns error if memory allocation is failed.
But the vxlan module doesn't check the return value of gro_cells_init().

Fixes: 58ce31cca1ff ("vxlan: GRO support at tunnel layer")`
Signed-off-by: Taehee Yoo <ap420073@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/vxlan.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)

--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2454,10 +2454,19 @@ static void vxlan_vs_add_dev(struct vxla
/* Setup stats when device is created */
static int vxlan_init(struct net_device *dev)
{
+ struct vxlan_dev *vxlan = netdev_priv(dev);
+ int err;
+
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!dev->tstats)
return -ENOMEM;

+ err = gro_cells_init(&vxlan->gro_cells, dev);
+ if (err) {
+ free_percpu(dev->tstats);
+ return err;
+ }
+
return 0;
}

@@ -2717,8 +2726,6 @@ static void vxlan_setup(struct net_devic

vxlan->dev = dev;

- gro_cells_init(&vxlan->gro_cells, dev);
-
for (h = 0; h < FDB_HASH_SIZE; ++h)
INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
}