This is a note to let you know that I've just added the patch titled
tcp: refresh tp timestamp before tcp_mtu_probe()
to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: tcp-refresh-tp-timestamp-before-tcp_mtu_probe.patch and it can be found in the queue-4.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Nov 15 17:25:34 CET 2017
From: Eric Dumazet edumazet@google.com Date: Thu, 26 Oct 2017 21:21:40 -0700 Subject: tcp: refresh tp timestamp before tcp_mtu_probe()
From: Eric Dumazet edumazet@google.com
[ Upstream commit ee1836aec4f5a977c1699a311db4d9027ef21ac8 ]
In the unlikely event tcp_mtu_probe() is sending a packet, we want tp->tcp_mstamp being as accurate as possible.
This means we need to call tcp_mstamp_refresh() a bit earlier in tcp_write_xmit().
Fixes: 385e20706fac ("tcp: use tp->tcp_mstamp in output path") Signed-off-by: Eric Dumazet edumazet@google.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv4/tcp_output.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2271,6 +2271,7 @@ static bool tcp_write_xmit(struct sock *
sent_pkts = 0;
+ tcp_mstamp_refresh(tp); if (!push_one) { /* Do MTU probing. */ result = tcp_mtu_probe(sk); @@ -2282,7 +2283,6 @@ static bool tcp_write_xmit(struct sock * }
max_segs = tcp_tso_segs(sk, mss_now); - tcp_mstamp_refresh(tp); while ((skb = tcp_send_head(sk))) { unsigned int limit;
Patches currently in stable-queue which might be from edumazet@google.com are
queue-4.13/tcp-refresh-tp-timestamp-before-tcp_mtu_probe.patch queue-4.13/net-call-cgroup_sk_alloc-earlier-in-sk_clone_lock.patch queue-4.13/tcp-dccp-fix-ireq-opt-races.patch queue-4.13/tcp-fix-tcp_mtu_probe-vs-highest_sack.patch queue-4.13/ipv6-addrconf-increment-ifp-refcount-before-ipv6_del_addr.patch queue-4.13/ipv6-flowlabel-do-not-leave-opt-tot_len-with-garbage.patch queue-4.13/packet-avoid-panic-in-packet_getsockopt.patch queue-4.13/sctp-add-the-missing-sock_owned_by_user-check-in-sctp_icmp_redirect.patch queue-4.13/net_sched-avoid-matching-qdisc-with-zero-handle.patch queue-4.13/tun-tap-sanitize-tunsetsndbuf-input.patch queue-4.13/tcp-dccp-fix-lockdep-splat-in-inet_csk_route_req.patch queue-4.13/tcp-dccp-fix-other-lockdep-splats-accessing-ireq_opt.patch