[PATCH -next] net: neigh: use dev_kfree_skb_irq instead of kfree_skb()

[Yang Yingliang]

It is not allowed to call kfree_skb() from hardware interrupt
context or with interrupts being disabled. So replace kfree_skb()
with dev_kfree_skb_irq() under spin_lock_irqsave().

Fixes: 66ba215cb513 ("neigh: fix possible DoS due to net iface start/stop loop")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
 net/core/neighbour.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 5b669eb80270..167826200f3e 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -328,7 +328,7 @@ static void pneigh_queue_purge(struct sk_buff_head *list, struct net *net)
 			__skb_unlink(skb, list);
 
 			dev_put(dev);
-			kfree_skb(skb);
+			dev_kfree_skb_irq(skb);
 		}
 		skb = skb_next;
 	}
-- 
2.25.1