From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 392A3C6377D for ; Thu, 22 Jul 2021 16:41:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A1A7613F4 for ; Thu, 22 Jul 2021 16:41:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232626AbhGVQBI (ORCPT ); Thu, 22 Jul 2021 12:01:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:35056 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233380AbhGVP6v (ORCPT ); Thu, 22 Jul 2021 11:58:51 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E1726136D; Thu, 22 Jul 2021 16:39:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626971961; bh=sponig7x7Ln5ffgY5GWc8EuHMcbuPqadfCcrwxr+gJ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jClw3vIGRU6JtKx7P2oooC0iEDo2hj7Z60jS08TRqM63WmIWpDeB+hZtj0vS42FdQ RDrMbmyOLrBV6oS4Hj7HvXXptOiuGTwMwPASDUQYbPDWcPexEGL2TR9VCHxbGodQ2U ElUPQSwS0ltug6tzXpWwv8Hmo5V9dGpR7oaAY3AY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Ahern , Vadim Fedorenko , "David S. Miller" Subject: [PATCH 5.10 094/125] net: ipv6: fix return value of ip6_skb_dst_mtu Date: Thu, 22 Jul 2021 18:31:25 +0200 Message-Id: <20210722155627.813308798@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210722155624.672583740@linuxfoundation.org> References: <20210722155624.672583740@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vadim Fedorenko commit 40fc3054b45820c28ea3c65e2c86d041dc244a8a upstream. Commit 628a5c561890 ("[INET]: Add IP(V6)_PMTUDISC_RPOBE") introduced ip6_skb_dst_mtu with return value of signed int which is inconsistent with actually returned values. Also 2 users of this function actually assign its value to unsigned int variable and only __xfrm6_output assigns result of this function to signed variable but actually uses as unsigned in further comparisons and calls. Change this function to return unsigned int value. Fixes: 628a5c561890 ("[INET]: Add IP(V6)_PMTUDISC_RPOBE") Reviewed-by: David Ahern Signed-off-by: Vadim Fedorenko Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- include/net/ip6_route.h | 2 +- net/ipv6/xfrm6_output.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -262,7 +262,7 @@ static inline bool ipv6_anycast_destinat int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb, int (*output)(struct net *, struct sock *, struct sk_buff *)); -static inline int ip6_skb_dst_mtu(struct sk_buff *skb) +static inline unsigned int ip6_skb_dst_mtu(struct sk_buff *skb) { int mtu; --- a/net/ipv6/xfrm6_output.c +++ b/net/ipv6/xfrm6_output.c @@ -56,7 +56,7 @@ static int __xfrm6_output(struct net *ne { struct dst_entry *dst = skb_dst(skb); struct xfrm_state *x = dst->xfrm; - int mtu; + unsigned int mtu; bool toobig; #ifdef CONFIG_NETFILTER