Received: by 2002:ac0:aa62:0:0:0:0:0 with SMTP id w31-v6csp776059ima; Wed, 24 Oct 2018 09:03:14 -0700 (PDT) X-Google-Smtp-Source: AJdET5dw3Mv6MGHNffvMHFjg4UPKJa1/vX4bm107diXAVO18hYbrzi/h07C3NH6EG8id29rX5kod X-Received: by 2002:a65:4783:: with SMTP id e3-v6mr3034580pgs.12.1540396994722; Wed, 24 Oct 2018 09:03:14 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1540396994; cv=none; d=google.com; s=arc-20160816; b=YZCDviSTE0ReGjqRt9AH+N90D9vo6n3tgq4OYW5wy5behPPt+HqJbUl6brmIZnbTIx l5KM5xKC5C3Mw/f2FtVrNLmdJm+gTdZmPPnxkKW9cG++qtD8k2bCk6VEtibkUPfvgT+i Cy6Ffc/7M223kwO3g+nJsSfsc9bA3ungk4cgDQ+2q3tAldw9hxxORLqncSaewdbRnm+I yEfQUTlzizlk2Aa+6N1HWJiH8bbeqZi6cgx1FeonsTeL6RKhgEO2QIwYAQFTBUnkA7Od r9UWAsx21YqGN/x02SdqC3Jssc28JLX/22Ia4gjrBriRaDfoPcutDYDOdwrPC/NB5MMM MjGw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=kyma9Rf/VT3JG6J582/x0oyAG7ma1+Pf4kgGkvF+id0=; b=UN8bgOn8YUxTQVjZK6NYvtfwfCyaywfuUEXp+ePHABquwfv+93v+L58nUPRruCyO+i sBM2ZZheoZr+Xr1jpWwp5nWkBXB2Ovjcbmc6OxYQqVZenOI/IQukWvJEE93ZqqH4NuHD bDMYse2xXNj6Lueav1cfVUHew1Yzwk5CRLb1vCPNGlYP4utDIo4Dofpq0lQH7Mec/n8/ QtEX8yBEpG0b0zGpPvhcmNhe9x755/BGCpQhOzcMX6LGDTLwkZP86IeJCFwzGJK4qDs+ /hmOEeeRMmEbE+Qhvq4EGfUBJQrMS+DOEI6+cuR4N/sl+4uRy311FmAasLBU3feVfu7z He2A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id u37-v6si5175056pgl.585.2018.10.24.09.02.47; Wed, 24 Oct 2018 09:03:14 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727026AbeJYAat (ORCPT + 99 others); Wed, 24 Oct 2018 20:30:49 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:35474 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726449AbeJYAat (ORCPT ); Wed, 24 Oct 2018 20:30:49 -0400 Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id w9OG1gWq025342; Wed, 24 Oct 2018 18:01:42 +0200 Date: Wed, 24 Oct 2018 18:01:42 +0200 From: Willy Tarreau To: Eric Dumazet Cc: wanghaifine@gmail.com, David Miller , Alexey Kuznetsov , Hideaki YOSHIFUJI , netdev , LKML Subject: Re: [PATCH] Change judgment len position Message-ID: <20181024160142.GB25314@1wt.eu> References: <20181024154729.5312-1-wanghaifine@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.6.1 (2016-04-27) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 24, 2018 at 08:59:39AM -0700, Eric Dumazet wrote: > I really wonder if you actually tested this patch. I'm even wondering if it's not done on purpose to retrieve up to 2 GB of kernel memory via a single getsockopt() call :-/ Willy