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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 F3478C43142 for ; Tue, 26 Jun 2018 07:00:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9C422416A for ; Tue, 26 Jun 2018 07:00:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BYpyV2XC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A9C422416A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752582AbeFZHAk (ORCPT ); Tue, 26 Jun 2018 03:00:40 -0400 Received: from mail-pl0-f67.google.com ([209.85.160.67]:41369 "EHLO mail-pl0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751025AbeFZHAi (ORCPT ); Tue, 26 Jun 2018 03:00:38 -0400 Received: by mail-pl0-f67.google.com with SMTP id w8-v6so8097803ply.8; Tue, 26 Jun 2018 00:00:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=CKfD6RI6MG4yqNi9D5mgM+xCuUniZDKXZD34hzHcvdU=; b=BYpyV2XC2afQkG6VLBIAl8qZYYLis6FuEVxGlbZwurHxXfXvFdgmogzwkiEStSYNMw 1PEaufRSHot1GUXw7SjYLS0hSJhuQMZkNWY9xKGPcGthertumEDg4Mv3utVKVfKdZA8l qb2EDpPIAvmKvnabhiUzEMj+x0WP1b85ND+ad/96oGhA3zZoTUbvp5+k1huCC8S2AZEy q212rUn2QhSnAnxr+Ynt0+V2XN6otfd95qMW+tD38GbbTx7DB6WNjB/9oCPSdar2hBFX 78jWyZmUTnAam9IkP47cFG99AHhHggyiQWm/XnXCCgnJBqEqtIEUKZodUznKOz7v5WfB e89Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=CKfD6RI6MG4yqNi9D5mgM+xCuUniZDKXZD34hzHcvdU=; b=ZLPztTFjMo8s2PLcgg3kUd1I1ibzOhzOV1KE3MmEeGhkCVnu1GTJsxrvDe4cGAy7V9 cMi7EtXpGpMDYOhYsll0XCg/lO+xmbJFrrq4BZbppH5pxJ+J9oxfj7NQSEjUU3BXnlSk Mih51RrkSSzwMviwWj+cmP5lkbuKQ8G8BP51lYuoXKHUhha8TDXaJH0BdpsxSy9P0bfF OVCmDNuRdrPVGQNv39sGuXX5Ge6512wJqWDtpU9pTpt2vOTtf/Ew7lTm84vUmvrQvN4B 2QD6RmDm6KiLbJeRO5kASoH0D9jpT9eD0za1SpjXp+P4jNSGy5G8/VvWth8LgX/8vN46 92rg== X-Gm-Message-State: APt69E0PQ9Kgp8Pib8iupK9D7GopUZ7sHkri7yZ/buDhoZE7n2YBWLcQ nNJFF+0gBJGeWG0p2z7t5VI= X-Google-Smtp-Source: ADUXVKI2pwZHfGWfEaA7B5qaOFCcGzt45zDKFCzdf9Le+T9sb+OGUFFJDTUY2F9aZ2zJmgsUIyCehg== X-Received: by 2002:a17:902:758e:: with SMTP id j14-v6mr346760pll.160.1529996438108; Tue, 26 Jun 2018 00:00:38 -0700 (PDT) Received: from localhost ([175.223.48.122]) by smtp.gmail.com with ESMTPSA id q82-v6sm1616402pfg.170.2018.06.26.00.00.35 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 26 Jun 2018 00:00:36 -0700 (PDT) Date: Tue, 26 Jun 2018 16:00:33 +0900 From: Sergey Senozhatsky To: Eric Dumazet Cc: Sergey Senozhatsky , Dmitry Vyukov , Samuel Ortiz , "David S. Miller" , Steven Rostedt , Petr Mladek , syzkaller-bugs , linux-wireless@vger.kernel.org, netdev , LKML , syzbot , Sergey Senozhatsky Subject: Re: [PATCH] NFC: llcp: fix nfc_llcp_send_ui_frame() lockup Message-ID: <20180626070033.GA25715@jagdpanzerIV> References: <20180626044119.30118-1-sergey.senozhatsky@gmail.com> <20180626051221.GC31439@jagdpanzerIV> <8c410102-43ab-dfdb-0d71-2ee5951e1af8@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8c410102-43ab-dfdb-0d71-2ee5951e1af8@gmail.com> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (06/25/18 23:44), Eric Dumazet wrote: > > The loop is still infinite, correct, but we have a preemption point now. > > Sure, net people can come with a much better solution, I'll be happy to > > scratch my patch. > > > > This can not be the right solution, think about current thread being real time, > cond_resched() might be a nop. > NFC maintainers should really take a look at this. I'm all for it. -ss