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Commit 960a2628 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: better drop monitoring in ip{6}_recv_error() 



We should call consume_skb(skb) when skb is properly consumed,
or kfree_skb(skb) when skb must be dropped in error case.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0aea76d3

net/ipv4/ip_sockglue.c

+5 −5
Original line number Diff line number Diff line
@@ -510,9 +510,10 @@ int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) 
		copied = len;

	}

	err = skb_copy_datagram_msg(skb, 0, msg, copied);

	if (err)

		goto out_free_skb;



	if (unlikely(err)) {

		kfree_skb(skb);

		return err;

	}

	sock_recv_timestamp(msg, sk, skb);



	serr = SKB_EXT_ERR(skb);
@@ -544,8 +545,7 @@ int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) 
	msg->msg_flags |= MSG_ERRQUEUE;

	err = copied;



out_free_skb:

	kfree_skb(skb);

	consume_skb(skb);

out:

	return err;

}

net/ipv6/datagram.c

+5 −5
Original line number Diff line number Diff line
@@ -450,9 +450,10 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) 
		copied = len;

	}

	err = skb_copy_datagram_msg(skb, 0, msg, copied);

	if (err)

		goto out_free_skb;



	if (unlikely(err)) {

		kfree_skb(skb);

		return err;

	}

	sock_recv_timestamp(msg, sk, skb);



	serr = SKB_EXT_ERR(skb);
@@ -509,8 +510,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) 
	msg->msg_flags |= MSG_ERRQUEUE;

	err = copied;



out_free_skb:

	kfree_skb(skb);

	consume_skb(skb);

out:

	return err;

}