From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-13539-1516208731-2-7026639593312623881 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 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES daen, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='us-ascii' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-serial-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1516208731; b=Y/PnK0U8Rfhy9OYWwlH1Bz6QTSfPll0CUngVc4hfF6TQtxn 6uu+cpoyT3tt0rAG1ZWc+C8NHFYYX7nhLP01ohZ7+YQEdbd8octgywwXeyBOK3YF lviA59ob54JE+QFrIzqP1/4DDjVEA0j0665c9jcBK1OXmGfQPjhTpjSvCQlwFU2e nXwaGJGHV+uuoz9Rj4PpjVJd9ZdCywBxUU3fMhu3kFrU+mIZ0qVDYox3vHvGNAdO 6yk+wF3Cjwt+lnBFBf4eGSW/mnylkfLFsYSF4Boazsoorzk5iVLiRJ1VnDXD7Rc/ QvuxT08iCfmkQ3/EwNOvcRpYJTp0kVp83KytskQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to:sender :list-id; s=arctest; t=1516208731; bh=pvzJRnqddpQZUlq0CXSxmaeIS7 L3ZTDhliF237E2vbA=; b=uqEpSnQk8n9XZKp2cA49ErdzMldHAA24GzBiDuhS8o zr6qKbq7WjJRDg74tRlb/eDgUoWlWrijJKr+zM9/tBuNZn3T37Q/WtM6pTAIl6gb t+XXo3fRNoo0YaZRVhRvAjKU32U+6tFnXarGqDMpC6Wbb6GgyTLMVZrmSA9HuVQZ 0Z2KAAsE9KB7qKYbNlyMS65XwHT34PsD77lTpKxyrgq5+lvhEZ6YmZnLarJbH2xM Wt1JPgs3N/t4VZukekG9Le2XOIpbcmtQxm3sXUBVdI/xlYXu/D5l6vZXBXSwlCeY WLkcH+P2v8skd5OXXdeIBQ0bukvg17ffTuFcmjDBmsiA== ARC-Authentication-Results: i=1; mx1.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=linux-serial-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: mx1.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=linux-serial-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 S1752275AbeAQRF2 (ORCPT ); Wed, 17 Jan 2018 12:05:28 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:44442 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750969AbeAQRF2 (ORCPT ); Wed, 17 Jan 2018 12:05:28 -0500 Date: Wed, 17 Jan 2018 18:05:20 +0100 From: Greg KH To: Shankara Pailoor Cc: jslaby@suse.com, LKML , syzkaller , linux-serial@vger.kernel.org Subject: Re: RCU stall in 8250 serial driver Linux 4.15-rc1 Message-ID: <20180117170520.GA12606@kroah.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-serial-owner@vger.kernel.org X-Mailing-List: linux-serial@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed, Jan 17, 2018 at 08:53:06AM -0800, Shankara Pailoor wrote: > Hi, > > Syzkaller found the following rcu stall report in Linux 4.15-rc1: > https://pastebin.com/NyZ9JdRv > > The following C program reproduces it: https://pastebin.com/gqwDWWpA > > Configs Here: https://pastebin.com/v6M3iKi1 I don't visit random web sites for random bugs. Please include all of the information in the email itself. thanks, greg k-h