From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: 3.3.0, 3.4-rc1 reproducible tun Oops Date: Thu, 05 Apr 2012 04:41:04 +0200 Message-ID: <1333593664.18626.577.camel@edumazet-glaptop> References: <20120404220525.GD21505@hostway.ca> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Simon Kirby Return-path: Received: from mail-wi0-f170.google.com ([209.85.212.170]:47623 "EHLO mail-wi0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752238Ab2DEClN (ORCPT ); Wed, 4 Apr 2012 22:41:13 -0400 Received: by wibhr17 with SMTP id hr17so988981wib.1 for ; Wed, 04 Apr 2012 19:41:11 -0700 (PDT) In-Reply-To: <20120404220525.GD21505@hostway.ca> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, 2012-04-04 at 15:05 -0700, Simon Kirby wrote: > I use an SSH VPN occasionally from home, and since upgrading the > remote > kernel to 3.3.0, the it now seems to Oops when I ^C the tunnel with > sockets still active. If I start the tunnel, log in to a box through > it > and run "vmstat 1", ^C the tunnel SSH process, and start it up again, > I > get an Oops like this: > > BUG: unable to handle kernel NULL pointer dereference at > 00000000000000ff > IP: [] __kmalloc_track_caller+0xaa/0x1b0 > PGD 12d2bc067 PUD 0 > Oops: 0000 [#1] SMP > CPU 1 > Modules linked in: nf_conntrack_netlink nfnetlink iptable_mangle > ipt_MASQUERADE xt_state xt_conntrack iptable_nat nf_nat > nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack hwmon_vid ppp_async > ppp_generic slhc crc_ccitt tun nvidia(PO) uvcvideo videobuf2_vmalloc > videobuf2_memops videobuf2_core e100 > > Pid: 16156, comm: sshd Tainted: P O 3.3.0 #32 System > manufacturer System Product Name/A8N-VM CSM Hmm, is it happening if you remove the nvidia module ? If yes, please try to add slub_debug=FZPU CONFIG_SLUB_DEBUG=y CONFIG_SLUB=y # CONFIG_SLUB_DEBUG_ON is not set