This is a note to let you know that I've just added the patch titled
tcp: purge write queue upon aborting the connection
to the 4.15-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-purge-write-queue-upon-aborting-the-connection.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Mar 28 18:37:51 CEST 2018
From: Soheil Hassas Yeganeh <soheil@xxxxxxxxxx>
Date: Tue, 6 Mar 2018 17:15:12 -0500
Subject: tcp: purge write queue upon aborting the connection
From: Soheil Hassas Yeganeh <soheil@xxxxxxxxxx>
[ Upstream commit e05836ac07c77dd90377f8c8140bce2a44af5fe7 ]
When the connection is aborted, there is no point in
keeping the packets on the write queue until the connection
is closed.
Similar to a27fd7a8ed38 ('tcp: purge write queue upon RST'),
this is essential for a correct MSG_ZEROCOPY implementation,
because userspace cannot call close(fd) before receiving
zerocopy signals even when the connection is aborted.
Fixes: f214f915e7db ("tcp: enable MSG_ZEROCOPY")
Signed-off-by: Soheil Hassas Yeganeh <soheil@xxxxxxxxxx>
Signed-off-by: Neal Cardwell <ncardwell@xxxxxxxxxx>
Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: Yuchung Cheng <ycheng@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/tcp.c | 1 +
net/ipv4/tcp_timer.c | 1 +
2 files changed, 2 insertions(+)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3542,6 +3542,7 @@ int tcp_abort(struct sock *sk, int err)
bh_unlock_sock(sk);
local_bh_enable();
+ tcp_write_queue_purge(sk);
release_sock(sk);
return 0;
}
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -34,6 +34,7 @@ static void tcp_write_err(struct sock *s
sk->sk_err = sk->sk_err_soft ? : ETIMEDOUT;
sk->sk_error_report(sk);
+ tcp_write_queue_purge(sk);
tcp_done(sk);
__NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTONTIMEOUT);
}
Patches currently in stable-queue which might be from soheil@xxxxxxxxxx are
queue-4.15/tcp-purge-write-queue-upon-aborting-the-connection.patch