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ipv4: add a sock pointer to ip_queue_xmit()

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ip_queue_xmit() assumes the skb it has to transmit is attached to an
inet socket. Commit 31c70d5956 ("l2tp: keep original skb ownership")
changed l2tp to not change skb ownership and thus broke this assumption.

One fix is to add a new 'struct sock *sk' parameter to ip_queue_xmit(),
so that we do not assume skb->sk points to the socket used by l2tp
tunnel.

Fixes: 31c70d5956 ("l2tp: keep original skb ownership")
Reported-by: Zhan Jianyu <nasa4836@gmail.com>
Tested-by: Zhan Jianyu <nasa4836@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2014-04-15 12:58:34 -04:00
committed by David S. Miller
parent 1dd333f470
commit b0270e9101
10 changed files with 13 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/dccp/output.c
+1 -1
View File
@@ -138,7 +138,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
err = icsk->icsk_af_ops->queue_xmit(skb, &inet->cork.fl);
err = icsk->icsk_af_ops->queue_xmit(sk, skb, &inet->cork.fl);
return net_xmit_eval(err);
}
return -ENOBUFS;
net/ipv4/ip_output.c
+3 -2
View File
@@ -315,9 +315,9 @@ static void ip_copy_addrs(struct iphdr *iph, const struct flowi4 *fl4)
sizeof(fl4->saddr) + sizeof(fl4->daddr));
}
int ip_queue_xmit(struct sk_buff *skb, struct flowi *fl)
/* Note: skb->sk can be different from sk, in case of tunnels */
int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)
{
struct sock *sk = skb->sk;
struct inet_sock *inet = inet_sk(sk);
struct ip_options_rcu *inet_opt;
struct flowi4 *fl4;
@@ -389,6 +389,7 @@ packet_routed:
ip_select_ident_more(skb, &rt->dst, sk,
(skb_shinfo(skb)->gso_segs ?: 1) - 1);
/* TODO : should we use skb->sk here instead of sk ? */
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
net/ipv4/tcp_output.c
+1 -1
View File
@@ -981,7 +981,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
TCP_ADD_STATS(sock_net(sk), TCP_MIB_OUTSEGS,
tcp_skb_pcount(skb));
err = icsk->icsk_af_ops->queue_xmit(skb, &inet->cork.fl);
err = icsk->icsk_af_ops->queue_xmit(sk, skb, &inet->cork.fl);
if (likely(err <= 0))
return err;
net/ipv6/inet6_connection_sock.c
+1 -2
View File
@@ -224,9 +224,8 @@ static struct dst_entry *inet6_csk_route_socket(struct sock *sk,
return dst;
}
int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
int inet6_csk_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl_unused)
{
struct sock *sk = skb->sk;
struct ipv6_pinfo *np = inet6_sk(sk);
struct flowi6 fl6;
struct dst_entry *dst;
net/l2tp/l2tp_core.c
+2 -2
View File
@@ -1131,10 +1131,10 @@ static int l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb,
skb->local_df = 1;
#if IS_ENABLED(CONFIG_IPV6)
if (tunnel->sock->sk_family == PF_INET6 && !tunnel->v4mapped)
error = inet6_csk_xmit(skb, NULL);
error = inet6_csk_xmit(tunnel->sock, skb, NULL);
else
#endif
error = ip_queue_xmit(skb, fl);
error = ip_queue_xmit(tunnel->sock, skb, fl);
/* Update stats */
if (error >= 0) {
net/l2tp/l2tp_ip.c
+1 -1
View File
@@ -487,7 +487,7 @@ static int l2tp_ip_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
xmit:
/* Queue the packet to IP for output */
rc = ip_queue_xmit(skb, &inet->cork.fl);
rc = ip_queue_xmit(sk, skb, &inet->cork.fl);
rcu_read_unlock();
error:
net/sctp/protocol.c
+1 -1
View File
@@ -957,7 +957,7 @@ static inline int sctp_v4_xmit(struct sk_buff *skb,
SCTP_INC_STATS(sock_net(&inet->sk), SCTP_MIB_OUTSCTPPACKS);
return ip_queue_xmit(skb, &transport->fl);
return ip_queue_xmit(&inet->sk, skb, &transport->fl);
}
static struct sctp_af sctp_af_inet;