From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42604 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752218AbeA2UEZ (ORCPT ); Mon, 29 Jan 2018 15:04:25 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Robert Hering , "David S. Miller" Subject: [PATCH 4.14 33/71] net/tls: Fix inverted error codes to avoid endless loop Date: Mon, 29 Jan 2018 13:57:01 +0100 Message-Id: <20180129123829.425091510@linuxfoundation.org> In-Reply-To: <20180129123827.271171825@linuxfoundation.org> References: <20180129123827.271171825@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: "r.hering@avm.de" [ Upstream commit 30be8f8dba1bd2aff73e8447d59228471233a3d4 ] sendfile() calls can hang endless with using Kernel TLS if a socket error occurs. Socket error codes must be inverted by Kernel TLS before returning because they are stored with positive sign. If returned non-inverted they are interpreted as number of bytes sent, causing endless looping of the splice mechanic behind sendfile(). Signed-off-by: Robert Hering Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- include/net/tls.h | 2 +- net/tls/tls_sw.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) --- a/include/net/tls.h +++ b/include/net/tls.h @@ -168,7 +168,7 @@ static inline bool tls_is_pending_open_r static inline void tls_err_abort(struct sock *sk) { - sk->sk_err = -EBADMSG; + sk->sk_err = EBADMSG; sk->sk_error_report(sk); } --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -407,7 +407,7 @@ int tls_sw_sendmsg(struct sock *sk, stru while (msg_data_left(msg)) { if (sk->sk_err) { - ret = sk->sk_err; + ret = -sk->sk_err; goto send_end; } @@ -560,7 +560,7 @@ int tls_sw_sendpage(struct sock *sk, str size_t copy, required_size; if (sk->sk_err) { - ret = sk->sk_err; + ret = -sk->sk_err; goto sendpage_end; }