From c91289510602baf9a05b3501d97dc70efa269e01 Mon Sep 17 00:00:00 2001
From: Vasundhara Volam <vasundhara.volam@emulex.com>
Date: Mon, 3 Mar 2014 14:25:07 +0530
Subject: [PATCH] be2net: Fix skb double free in be_xmit_wrokarounds() failure
path
skb_padto(), skb_share_check() and __vlan_put_tag() routines free
skb when they return an error. This patch fixes be_xmit_workarounds()
to not free skb again in such cases.
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: Somnath Kotur <somnath.kotur@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/emulex/benet/be_main.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 9e6d678bca432..a9da6f94e2fd5 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -927,7 +927,7 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter,
*/
if (unlikely(!BEx_chip(adapter) && skb->len <= 32)) {
if (skb_padto(skb, 36))
- goto tx_drop;
+ goto err;
skb->len = 36;
}
@@ -959,7 +959,7 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter,
vlan_tx_tag_present(skb)) {
skb = be_insert_vlan_in_pkt(adapter, skb, skip_hw_vlan);
if (unlikely(!skb))
- goto tx_drop;
+ goto err;
}
/* HW may lockup when VLAN HW tagging is requested on
@@ -981,12 +981,13 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter,
be_vlan_tag_tx_chk(adapter, skb)) {
skb = be_insert_vlan_in_pkt(adapter, skb, skip_hw_vlan);
if (unlikely(!skb))
- goto tx_drop;
+ goto err;
}
return skb;
tx_drop:
dev_kfree_skb_any(skb);
+err:
return NULL;
}