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Date:   Sun, 20 Feb 2022 23:57:05 +0800
Subject: [PATCH net-next 3/3] net: neigh: add skb drop reasons to arp_error_report()

From: Menglong Dong <>

When neighbour become invalid or destroyed, neigh_invalidate() will be
called. neigh->ops->error_report() will be called if the neighbour's
state is NUD_FAILED, and seems here is the only use of error_report().
So we can tell that the reason of skb drops in arp_error_report() is

Replace kfree_skb() used in arp_error_report() with kfree_skb_reason().

Reviewed-by: Mengen Sun <>
Reviewed-by: Hao Peng <>
Signed-off-by: Menglong Dong <>
 net/ipv4/arp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 4db0325f6e1a..8e4ca4738c43 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -293,7 +293,7 @@ static int arp_constructor(struct neighbour *neigh)
 static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb)
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_NEIGH_FAILED);
 /* Create and send an arp packet. */

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