This is a note to let you know that I've just added the patch titled
tcp: don't annotate mark on control socket from tcp_v6_send_response()
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tcp-don-t-annotate-mark-on-control-socket-from-tcp_v6_send_response.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 92e55f412cffd016cc245a74278cb4d7b89bb3bc Mon Sep 17 00:00:00 2001
From: Pablo Neira <pablo@xxxxxxxxxxxxx>
Date: Thu, 26 Jan 2017 22:56:21 +0100
Subject: tcp: don't annotate mark on control socket from tcp_v6_send_response()
From: Pablo Neira <pablo@xxxxxxxxxxxxx>
commit 92e55f412cffd016cc245a74278cb4d7b89bb3bc upstream.
Unlike ipv4, this control socket is shared by all cpus so we cannot use
it as scratchpad area to annotate the mark that we pass to ip6_xmit().
Add a new parameter to ip6_xmit() to indicate the mark. The SCTP socket
family caches the flowi6 structure in the sctp_transport structure, so
we cannot use to carry the mark unless we later on reset it back, which
I discarded since it looks ugly to me.
Fixes: bf99b4ded5f8 ("tcp: fix mark propagation with fwmark_reflect enabled")
Suggested-by: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/net/ipv6.h | 2 +-
net/dccp/ipv6.c | 4 ++--
net/ipv6/inet6_connection_sock.c | 2 +-
net/ipv6/ip6_output.c | 4 ++--
net/ipv6/tcp_ipv6.c | 5 ++---
net/sctp/ipv6.c | 3 ++-
6 files changed, 10 insertions(+), 10 deletions(-)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -871,7 +871,7 @@ int ip6_rcv_finish(struct net *net, stru
* upper-layer output functions
*/
int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
- struct ipv6_txoptions *opt, int tclass);
+ __u32 mark, struct ipv6_txoptions *opt, int tclass);
int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -227,7 +227,7 @@ static int dccp_v6_send_response(const s
opt = ireq->ipv6_opt;
if (!opt)
opt = rcu_dereference(np->opt);
- err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
+ err = ip6_xmit(sk, skb, &fl6, sk->sk_mark, opt, np->tclass);
rcu_read_unlock();
err = net_xmit_eval(err);
}
@@ -281,7 +281,7 @@ static void dccp_v6_ctl_send_reset(const
dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL);
if (!IS_ERR(dst)) {
skb_dst_set(skb, dst);
- ip6_xmit(ctl_sk, skb, &fl6, NULL, 0);
+ ip6_xmit(ctl_sk, skb, &fl6, 0, NULL, 0);
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
DCCP_INC_STATS(DCCP_MIB_OUTRSTS);
return;
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -173,7 +173,7 @@ int inet6_csk_xmit(struct sock *sk, stru
/* Restore final destination back after routing done */
fl6.daddr = sk->sk_v6_daddr;
- res = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt),
+ res = ip6_xmit(sk, skb, &fl6, sk->sk_mark, rcu_dereference(np->opt),
np->tclass);
rcu_read_unlock();
return res;
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -163,7 +163,7 @@ int ip6_output(struct net *net, struct s
* which are using proper atomic operations or spinlocks.
*/
int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
- struct ipv6_txoptions *opt, int tclass)
+ __u32 mark, struct ipv6_txoptions *opt, int tclass)
{
struct net *net = sock_net(sk);
const struct ipv6_pinfo *np = inet6_sk(sk);
@@ -230,7 +230,7 @@ int ip6_xmit(const struct sock *sk, stru
skb->protocol = htons(ETH_P_IPV6);
skb->priority = sk->sk_priority;
- skb->mark = sk->sk_mark;
+ skb->mark = mark;
mtu = dst_mtu(dst);
if ((skb->len <= mtu) || skb->ignore_df || skb_is_gso(skb)) {
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -467,7 +467,7 @@ static int tcp_v6_send_synack(const stru
opt = ireq->ipv6_opt;
if (!opt)
opt = rcu_dereference(np->opt);
- err = ip6_xmit(sk, skb, fl6, opt, np->tclass);
+ err = ip6_xmit(sk, skb, fl6, sk->sk_mark, opt, np->tclass);
rcu_read_unlock();
err = net_xmit_eval(err);
}
@@ -837,8 +837,7 @@ static void tcp_v6_send_response(const s
dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL);
if (!IS_ERR(dst)) {
skb_dst_set(buff, dst);
- ctl_sk->sk_mark = fl6.flowi6_mark;
- ip6_xmit(ctl_sk, buff, &fl6, NULL, tclass);
+ ip6_xmit(ctl_sk, buff, &fl6, fl6.flowi6_mark, NULL, tclass);
TCP_INC_STATS(net, TCP_MIB_OUTSEGS);
if (rst)
TCP_INC_STATS(net, TCP_MIB_OUTRSTS);
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -222,7 +222,8 @@ static int sctp_v6_xmit(struct sk_buff *
SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS);
rcu_read_lock();
- res = ip6_xmit(sk, skb, fl6, rcu_dereference(np->opt), np->tclass);
+ res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt),
+ np->tclass);
rcu_read_unlock();
return res;
}
Patches currently in stable-queue which might be from pablo@xxxxxxxxxxxxx are
queue-4.9/tcp-don-t-annotate-mark-on-control-socket-from-tcp_v6_send_response.patch
queue-4.9/tcp-fix-mark-propagation-with-fwmark_reflect-enabled.patch