From: Soheil Hassas Yeganeh Date: Tue, 6 Mar 2018 22:15:12 +0000 (-0500) Subject: tcp: purge write queue upon aborting the connection X-Git-Tag: v4.15.15~44 X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=960058fe196397aecb16bb14e64980e265d2bc5e;p=linux tcp: purge write queue upon aborting the connection [ 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 Signed-off-by: Neal Cardwell Reviewed-by: Eric Dumazet Signed-off-by: Yuchung Cheng Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index c821f5d68720..2eb91b97a062 100644 --- 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; } diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c index 388158c9d9f6..c721140a7d79 100644 --- a/net/ipv4/tcp_timer.c +++ b/net/ipv4/tcp_timer.c @@ -34,6 +34,7 @@ static void tcp_write_err(struct sock *sk) 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); }