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Message-ID: <20220818043729.412753-1-yangyingliang@huawei.com>
Date: Thu, 18 Aug 2022 12:37:29 +0800
From: Yang Yingliang <yangyingliang@...wei.com>
To: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
CC: <den@...nvz.org>, <davem@...emloft.net>, <edumazet@...gle.com>,
<kuba@...nel.org>
Subject: [PATCH -next] net: neigh: use dev_kfree_skb_irq instead of kfree_skb()
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@...wei.com>
---
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
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