From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-3704313-1519414465-2-3997895534870614679 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1519414465; b=E5OiVepvfHM4eaD3umncm7l4nCHco9Kh139fdmnNzarrisi a2DnvpAIrVPo4nGHLu1VV6Oxzoy1AQ/BfXL8YlZVBNdLKKURvGS/5E1Z1/Dwhs2E dJOyk6Xhsoz/aPVW2XjZ2ljIbkSpygdVz3iXqpkXt0/GQ1UzbDVcYJdGdsj0DIPW X80xh8Ld7EVF1TD/7M2y14osvsHAlkT60FPX+5CQc6tvOYqQgeE2pmMQpeHJKSyM jhjpoZaoo4zt/tnvJKJkl9heYboJzra1F/FDxPsQAoKPhnf/zq3TrYFf1x7AUyvc H0C6CpxAa/M6QUYY807kGYi0igdyxxcMFSqgDhQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=arctest; t=1519414465; bh=fxkKHlNe/trC7xfR3W5NiTBrMP clC8j1umgKa+AGHpQ=; b=aRjP76/jfTNiXPNtYW8wmCCzu2BeSIbeMB/SzQsJmG DwcPZWEriIgpu5xdQ0HVDRbWxS0OMg63J5cmaNVkm6xB8XdDkn6dn3P6CTFbJeq8 E7oD5LbEyxfW3bXnUdG7ezsHXPJEYAIbCLomBrcxFh8CdQ5Es0h0DUOQ0svfH2Dt 8xtqDrRzk/pFDutBQ+idzNT9he0r+9KT8s8sofpJc+EiDS3vbmrBMh+xOu/cyZ7y BlLXYBz11syn20TBZdzL5dNhfj3JedSPt2381r+Hu/XprtntZZMIh8DAb9bctVYE APNW2yGFJMrTQAivu1WcnbcCKYu0A01axpQuKyYJlp9w== ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753238AbeBWTeL (ORCPT ); Fri, 23 Feb 2018 14:34:11 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:45914 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934866AbeBWSvC (ORCPT ); Fri, 23 Feb 2018 13:51:02 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Willem de Bruijn , "David S. Miller" Subject: [PATCH 4.14 043/159] net: avoid skb_warn_bad_offload on IS_ERR Date: Fri, 23 Feb 2018 19:25:51 +0100 Message-Id: <20180223170748.597729358@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180223170743.086611315@linuxfoundation.org> References: <20180223170743.086611315@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Willem de Bruijn commit 8d74e9f88d65af8bb2e095aff506aa6eac755ada upstream. skb_warn_bad_offload warns when packets enter the GSO stack that require skb_checksum_help or vice versa. Do not warn on arbitrary bad packets. Packet sockets can craft many. Syzkaller was able to demonstrate another one with eth_type games. In particular, suppress the warning when segmentation returns an error, which is for reasons other than checksum offload. See also commit 36c92474498a ("net: WARN if skb_checksum_help() is called on skb requiring segmentation") for context on this warning. Signed-off-by: Willem de Bruijn Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2792,7 +2792,7 @@ struct sk_buff *__skb_gso_segment(struct segs = skb_mac_gso_segment(skb, features); - if (unlikely(skb_needs_check(skb, tx_path))) + if (unlikely(skb_needs_check(skb, tx_path) && !IS_ERR(segs))) skb_warn_bad_offload(skb); return segs;