Received: by 2002:a05:6358:d09b:b0:dc:cd0c:909e with SMTP id jc27csp3292806rwb; Sat, 3 Dec 2022 02:26:47 -0800 (PST) X-Google-Smtp-Source: AA0mqf6ua54LKmCji/tNBTXguIYqH9BHI8jSTr300PBaIOT02RgycVp1k/itYVOSbpY3dxuPSs2T X-Received: by 2002:a17:90a:9f46:b0:219:b1db:f7e3 with SMTP id q6-20020a17090a9f4600b00219b1dbf7e3mr980032pjv.64.1670063207425; Sat, 03 Dec 2022 02:26:47 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1670063207; cv=none; d=google.com; s=arc-20160816; b=B5iKUJRf6f6RN/bdxfBmJjVC2EeZLQB7tBViELhn7YmRPEWMeEFyZ1ZWTdVSz/BXFT 6wb/o4vRQCTauNbRB20eX0n2Bh0AE300Yi/44prH4gRZsh5anK9WxMlOaz3Ia/Q5AKw/ WM8xuEGPO/t3SXENXEYGsIspI5ORKAFsePn9o6CUormrqXazGvVtVsnbDKacMgHDPBDB 3mJCNlrzFyBxvf039P+4ybvDoIpxF16r37rUAQqd/+mZLCldfmAk5EA02FF4D2GHQE+P hV8AAHM/CeKWvFtC+nJZO9Nh5891KyS/wmLl15CbhKgOjnCUsp8e4o49gQWs1Ov7tZl6 YY9Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:subject:cc:to:from; bh=mlgvq6wKhnYWqqodWZVHLbS8Bwfx+GLE9V0RKusxg2k=; b=Y38mGVxNzkBxi4RRRfxLa2Pb0/3NaBxFgXnla9J9TZ92/Rh1YNtVAHUTi2ybBUIHQQ FO6Q3OJdI2SfyyDXfx6EYu6TbGE/TAyR7niMdQ2m8x8x5WzS6TOsSIsQj0z/MUqL1hn1 m3YkZZGZ5dKFSkQvOEt8eHYBhfpTVcT5nE4wYOo7rMo/R6eTlpXpo35tTD0pS9aMB5Ly uxgwqRFqVPv1Wz0QOeBQWQ8E50GNPOkP7Y3b+jHWAoF3Z1ezNKg9HuaZPyT0s0/hMmRm rK3vKACAiggfFJHXPZOkUgnJlG+ZWjkqRCTYcALAva0ldMUZk6p4pwmCcaELurky2fcQ NfvQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id e8-20020a17090a9a8800b001fb23f3f238si9223742pjp.71.2022.12.03.02.26.37; Sat, 03 Dec 2022 02:26:47 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229566AbiLCJqo (ORCPT + 82 others); Sat, 3 Dec 2022 04:46:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229476AbiLCJqm (ORCPT ); Sat, 3 Dec 2022 04:46:42 -0500 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B54A562E87; Sat, 3 Dec 2022 01:46:40 -0800 (PST) Received: from canpemm500007.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4NPQ0y21WxzRp9g; Sat, 3 Dec 2022 17:45:54 +0800 (CST) Received: from localhost (10.174.179.215) by canpemm500007.china.huawei.com (7.192.104.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sat, 3 Dec 2022 17:46:38 +0800 From: YueHaibing To: , , , , , CC: , , , YueHaibing Subject: [PATCH net] tipc: Fix potential OOB in tipc_link_proto_rcv() Date: Sat, 3 Dec 2022 17:46:35 +0800 Message-ID: <20221203094635.29024-1-yuehaibing@huawei.com> X-Mailer: git-send-email 2.10.2.windows.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.179.215] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To canpemm500007.china.huawei.com (7.192.104.62) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fix the potential risk of OOB if skb_linearize() fails in tipc_link_proto_rcv(). Fixes: 5cbb28a4bf65 ("tipc: linearize arriving NAME_DISTR and LINK_PROTO buffers") Signed-off-by: YueHaibing --- net/tipc/link.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index e260c0d557f5..b3ce24823f50 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -2224,7 +2224,9 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb, if (tipc_own_addr(l->net) > msg_prevnode(hdr)) l->net_plane = msg_net_plane(hdr); - skb_linearize(skb); + if (skb_linearize(skb)) + goto exit; + hdr = buf_msg(skb); data = msg_data(hdr); -- 2.34.1