From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Fw: [Bug 52481] New: Occasional NULL pointer dereference during ftp networking since 3.7 Date: Thu, 10 Jan 2013 09:21:36 -0800 Message-ID: <20130110092136.0a74f203@nehalam.linuxnetplumber.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from mail.vyatta.com ([76.74.103.46]:36728 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751907Ab3AJRXD (ORCPT ); Thu, 10 Jan 2013 12:23:03 -0500 Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.vyatta.com (Postfix) with ESMTP id 32B861410447 for ; Thu, 10 Jan 2013 09:23:03 -0800 (PST) Received: from mail.vyatta.com ([127.0.0.1]) by localhost (mail.vyatta.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yEoere-mR5VH for ; Thu, 10 Jan 2013 09:23:02 -0800 (PST) Received: from nehalam.linuxnetplumber.net (static-50-53-80-93.bvtn.or.frontiernet.net [50.53.80.93]) by mail.vyatta.com (Postfix) with ESMTPSA id 090B41410444 for ; Thu, 10 Jan 2013 09:23:02 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: Begin forwarded message: Date: Tue, 8 Jan 2013 14:29:18 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: shemminger@linux-foundation.org Subject: [Bug 52481] New: Occasional NULL pointer dereference during ftp networking since 3.7 https://bugzilla.kernel.org/show_bug.cgi?id=52481 Summary: Occasional NULL pointer dereference during ftp networking since 3.7 Product: Networking Version: 2.5 Kernel Version: 3.7.0 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: IPV4 AssignedTo: shemminger@linux-foundation.org ReportedBy: itumaykin@gmail.com Regression: Yes Created an attachment (id=90771) --> (https://bugzilla.kernel.org/attachment.cgi?id=90771) lspci -vvv I am experiencing occasional panics during ftp networking after installing kernel 3.7.0. I have vsftpd-3.0.2 up and running on port 21 with configuration not changed for months, I use passive FTP with nf_conntrack_ftp helper. My distro is Hardened Gentoo amd64 and I use not vanilla kernel, but with some Gentoo specific and grsec specific patches. Anyway, with kernel 3.5.4 I had no problems with my FTP at all, but with 3.7.0 there are random panics during or after FTP sessions. It happens more often after sessions with lots of data transferred, but sometimes only `ls` is enough to hang my machine. The nature of these errors is unknown to me, but the issue is definetely within the kernel as I tried to downgrade solely kernel back to 3.5.4 and everything returned back to normal. Also, I don't have traces of these panics in my logs, but I took photos of one of such cases. Here are links to them: https://docs.google.com/folder/d/0B9NAm8_0mptgU2RrMTZWX0NucUk/edit I understand there is probably not enough info to investigate the source of this issue, but I am ready to provide any additional info or do some testing. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.