net: ipv6: add skb drop reasons to ip6_protocol_deliver_rcu()

Replace kfree_skb() used in ip6_protocol_deliver_rcu() with
kfree_skb_reason().

No new reasons are added.

Some paths are ignored, as they are not common, such as encapsulation
on non-final protocol.

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Menglong Dong 2022-04-13 16:16:00 +08:00 коммит произвёл David S. Miller
Родитель 4daf841a2e
Коммит eeab7e7ff4
1 изменённых файлов: 12 добавлений и 4 удалений

Просмотреть файл

@ -362,6 +362,7 @@ void ip6_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int nexthdr,
const struct inet6_protocol *ipprot;
struct inet6_dev *idev;
unsigned int nhoff;
SKB_DR(reason);
bool raw;
/*
@ -421,12 +422,16 @@ resubmit_final:
if (ipv6_addr_is_multicast(&hdr->daddr) &&
!ipv6_chk_mcast_addr(dev, &hdr->daddr,
&hdr->saddr) &&
!ipv6_is_mld(skb, nexthdr, skb_network_header_len(skb)))
!ipv6_is_mld(skb, nexthdr, skb_network_header_len(skb))) {
SKB_DR_SET(reason, IP_INADDRERRORS);
goto discard;
}
}
if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
SKB_DR_SET(reason, XFRM_POLICY);
goto discard;
}
ret = INDIRECT_CALL_2(ipprot->handler, tcp_v6_rcv, udpv6_rcv,
skb);
@ -452,8 +457,11 @@ resubmit_final:
IPSTATS_MIB_INUNKNOWNPROTOS);
icmpv6_send(skb, ICMPV6_PARAMPROB,
ICMPV6_UNK_NEXTHDR, nhoff);
SKB_DR_SET(reason, IP_NOPROTO);
} else {
SKB_DR_SET(reason, XFRM_POLICY);
}
kfree_skb(skb);
kfree_skb_reason(skb, reason);
} else {
__IP6_INC_STATS(net, idev, IPSTATS_MIB_INDELIVERS);
consume_skb(skb);
@ -463,7 +471,7 @@ resubmit_final:
discard:
__IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS);
kfree_skb(skb);
kfree_skb_reason(skb, reason);
}
static int ip6_input_finish(struct net *net, struct sock *sk, struct sk_buff *skb)