Received: by 10.223.148.5 with SMTP id 5csp6081055wrq; Wed, 17 Jan 2018 09:06:32 -0800 (PST) X-Google-Smtp-Source: ACJfBov0G9xStmjJ/0opcCzNUUGJy0Jl9KXaFToLF5YPtV1FZlhTrSt/NDh16wFtTyfeu2cQmL9P X-Received: by 10.98.192.134 with SMTP id g6mr27230061pfk.91.1516208791914; Wed, 17 Jan 2018 09:06:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1516208791; cv=none; d=google.com; s=arc-20160816; b=nJNi/ojsU+l9S/EkwEB3puXwN5E/a/2q8PwqJY11v/3aAzgMuxtrX1QvbILBmU4/Kn 2s5aWbY8FO6w9eEuHca6oKl2ZL0OID4oi8DAjIQi4641soMSA+e2IywnQyxE557/3+7K /zb1i9KGxvwUBwP8EK+ypH8GfETM0uN1t3Hq8/XSy5uxRcn6Zui/MEVh1nXcm5gBU9qm euUjzVwiExbVXg+bgJGJCofpHXBbQO2/gN1KKgbz9w6E1vzLkabsSmSLc/iERoLOQuvF UszIVcwJtoRuRp99DKhYmkW982j7uUSnInvIQep4t/8F/SgaALeQ4fqcgNpXAuxfTBRb HBOg== 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:arc-authentication-results; bh=iEs7nxenVF3+6YyJPJ7HtbRIJAd83SihGDlzC2qczQg=; b=HJ7mJCkb3KKE/+kJ+7u5HMPNu19Mf6KWFwLN7u1ffh3lsGUNmRk16zFby6SlyO405k FGTp6Crzrv+r+vkbfQK8nHAP5e0kXy0Hl49R8hJvEF3+zNIyk8oA+S2rL2+qU524cEJz 8CbfNIXp7UuE9T+AusKC+jC5e8nwPMO+WsWpaiG+fKVNLsrgL10ZpV2xB6VqRNqKkPPs xr48EWhWSvuhrgeNZF7qaiOO8/EjxOlPAOmstZuX5BhaojBBBDWMlwqt9TyL2MYQaztP Xw6cnyFGsk6CvttbugIZ/lZ1RAVaFXDJ/3xucMVR8HcApzcLagYfcaJgQydvgPp0gXmw cpiw== 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 c15si4837436plk.327.2018.01.17.09.06.17; Wed, 17 Jan 2018 09:06:31 -0800 (PST) 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 S1753006AbeAQRFa (ORCPT + 99 others); Wed, 17 Jan 2018 12:05:30 -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 Received: from localhost (unknown [185.216.33.115]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 4A268FA2; Wed, 17 Jan 2018 17:05:27 +0000 (UTC) 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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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