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Miller" , Jakub Kicinski , Paolo Abeni Cc: Simon Horman , netdev@vger.kernel.org, eric.dumazet@gmail.com, David Ahern , Eric Dumazet X-Patchwork-Delegate: kuba@kernel.org ping_rcv() callers currently call skb_free() or consume_skb(), forcing ping_rcv() to clone the skb. After this patch ping_rcv() is now 'consuming' the original skb, either moving to a socket receive queue, or dropping it. Signed-off-by: Eric Dumazet --- net/ipv4/icmp.c | 5 +++-- net/ipv4/ping.c | 20 +++++--------------- net/ipv6/icmp.c | 7 ++----- 3 files changed, 10 insertions(+), 22 deletions(-) diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 058d4c1e300d0c0be7a04fd67e8e39924dfcd2cc..717cb7d3607a1c77a3f54b56d2bb98b1064dd878 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -1274,9 +1274,10 @@ int icmp_rcv(struct sk_buff *skb) } } - if (icmph->type == ICMP_EXT_ECHOREPLY) { + if (icmph->type == ICMP_EXT_ECHOREPLY || + icmph->type == ICMP_ECHOREPLY) { reason = ping_rcv(skb); - goto reason_check; + return reason ? NET_RX_DROP : NET_RX_SUCCESS; } /* diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 85d09f2ecadcb690f01985771afa37ce2cd0befc..c14baa6589c748026b49416688cbea399e6d461a 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -966,10 +966,9 @@ EXPORT_SYMBOL_GPL(ping_queue_rcv_skb); enum skb_drop_reason ping_rcv(struct sk_buff *skb) { - enum skb_drop_reason reason = SKB_DROP_REASON_NO_SOCKET; - struct sock *sk; struct net *net = dev_net(skb->dev); struct icmphdr *icmph = icmp_hdr(skb); + struct sock *sk; /* We assume the packet has already been checked by icmp_rcv */ @@ -980,20 +979,11 @@ enum skb_drop_reason ping_rcv(struct sk_buff *skb) skb_push(skb, skb->data - (u8 *)icmph); sk = ping_lookup(net, skb, ntohs(icmph->un.echo.id)); - if (sk) { - struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); - - pr_debug("rcv on socket %p\n", sk); - if (skb2) - reason = __ping_queue_rcv_skb(sk, skb2); - else - reason = SKB_DROP_REASON_NOMEM; - } - - if (reason) - pr_debug("no socket, dropping\n"); + if (sk) + return __ping_queue_rcv_skb(sk, skb); - return reason; + kfree_skb_reason(skb, SKB_DROP_REASON_NO_SOCKET); + return SKB_DROP_REASON_NO_SOCKET; } EXPORT_SYMBOL_GPL(ping_rcv); diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 4d14ab7f7e99f152cd5f5adaa023f0280957f275..3fd19a84b358d169bbdc351c43ede830c60afcf3 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -957,12 +957,9 @@ static int icmpv6_rcv(struct sk_buff *skb) break; case ICMPV6_ECHO_REPLY: - reason = ping_rcv(skb); - break; - case ICMPV6_EXT_ECHO_REPLY: - reason = ping_rcv(skb); - break; + ping_rcv(skb); + return 0; case ICMPV6_PKT_TOOBIG: /* BUGGG_FUTURE: if packet contains rthdr, we cannot update