From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 142F211CAE for ; Wed, 14 Jun 2023 23:03:17 +0000 (UTC) Received: from smtp-fw-80006.amazon.com (smtp-fw-80006.amazon.com [99.78.197.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0FFE32689 for ; Wed, 14 Jun 2023 16:03:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1686783797; x=1718319797; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=1Fe5vxHo1ET29LoAPa2ZgrHakpKm3aZfS23+EukuWw0=; b=W6kwbSpBLjpw9c//Qq3BaIoMpIpZWvsTPCID3GooliSTTYtC+Dtl5bR1 l4IEwg+/wVFwtZXgOIrsOUCm3JbViOEVllYvGQ3AuQYFyFzpLAQY3Nxs8 nO1wp9QNwILvhEXNRrEBOtJGyGS3Dggat6pWuZLO32OXPciEp2/oPCjKI 0=; X-IronPort-AV: E=Sophos;i="6.00,243,1681171200"; d="scan'208";a="220726771" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO email-inbound-relay-iad-1d-m6i4x-e651a362.us-east-1.amazon.com) ([10.25.36.210]) by smtp-border-fw-80006.pdx80.corp.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 23:03:14 +0000 Received: from EX19MTAUWB001.ant.amazon.com (iad12-ws-svc-p26-lb9-vlan3.iad.amazon.com [10.40.163.38]) by email-inbound-relay-iad-1d-m6i4x-e651a362.us-east-1.amazon.com (Postfix) with ESMTPS id E64DD8082F; Wed, 14 Jun 2023 23:03:10 +0000 (UTC) Received: from EX19D004ANA001.ant.amazon.com (10.37.240.138) by EX19MTAUWB001.ant.amazon.com (10.250.64.248) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 14 Jun 2023 23:02:57 +0000 Received: from 88665a182662.ant.amazon.com (10.187.170.18) by EX19D004ANA001.ant.amazon.com (10.37.240.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 14 Jun 2023 23:02:55 +0000 From: Kuniyuki Iwashima To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , David Ahern CC: Kuniyuki Iwashima , Kuniyuki Iwashima , Subject: [PATCH v1 net-next 4/5] ipv6: exthdrs: Reload hdr only when needed in ipv6_srh_rcv(). Date: Wed, 14 Jun 2023 16:01:06 -0700 Message-ID: <20230614230107.22301-5-kuniyu@amazon.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230614230107.22301-1-kuniyu@amazon.com> References: <20230614230107.22301-1-kuniyu@amazon.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.187.170.18] X-ClientProxiedBy: EX19D041UWB002.ant.amazon.com (10.13.139.179) To EX19D004ANA001.ant.amazon.com (10.37.240.138) Precedence: Bulk X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE,T_SPF_PERMERROR autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net We need not reload hdr in ipv6_srh_rcv() unless we call pskb_expand_head(). Signed-off-by: Kuniyuki Iwashima --- net/ipv6/exthdrs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index e62e26ac99ef..dd23531387e3 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -440,9 +440,9 @@ static int ipv6_srh_rcv(struct sk_buff *skb) kfree_skb(skb); return -1; } - } - hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb); + hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb); + } hdr->segments_left--; addr = hdr->segments + hdr->segments_left; -- 2.30.2