From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [PATCHSET v3] netfilter, cgroup: implement cgroup2 path match in xt_cgroup Date: Mon, 23 Nov 2015 14:58:04 -0500 Message-ID: <20151123195804.GB19072@mtj.duckdns.org> References: <1448122441-9335-1-git-send-email-tj@kernel.org> <5652BC3A.1010701@bmw-carit.de> <5652D448.3080002@bmw-carit.de> <20151123155346.GE3049@mtj.duckdns.org> Mime-Version: 1.0 Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; bh=KlbXUeGmUwyiU4tCpbXzb+hYgf5QA3mO1GUauc+Ahuw=; b=F3MA/JrJkiBt7LJLT+9bmnFNOkQR9NLC9dziI5UZC7LjFJDY4yGJPNQzCtDrcwC5xC Ye9Zx/ZSwhvOnvAWgWD+T+h5CKqsaA7VqAR0G3TDqmxvVCZYQ0d+eKIVAypjZ3f34tL1 crDBOJr4TsluHhqlRgxFXGE4x3hm4wlRgcVUEtgbyhufcKtW6GKbS81yorR2p8K+jOQ8 Yenid0azQQ5RFM7udxH5IxwVOZBj6M2zojhGIx7YFVn/V5vVg0Hfkg+wJbfmz+w/TSnp +JGKiBYdrbJ3p78TBTzZ4hE2hiFVHJwpwP7nTTtMwEGU+yy+fEE4NWJYac+BDTqrcnRM 9c9w== Content-Disposition: inline In-Reply-To: <20151123155346.GE3049@mtj.duckdns.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Daniel Wagner Cc: davem@davemloft.net, pablo@netfilter.org, kaber@trash.net, kadlec@blackhole.kfki.hu, daniel@iogearbox.net, nhorman@tuxdriver.co, lizefan@huawei.com, hannes@cmpxchg.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com, ninasc@fb.com Hello, On Mon, Nov 23, 2015 at 10:53:46AM -0500, Tejun Heo wrote: > > [ 11.594536] ------------[ cut here ]------------ > > [ 11.595274] WARNING: CPU: 1 PID: 1 at kernel/cgroup_pids.c:97 pids_cancel.constprop.6+0x31/0x40() > > [ 11.595958] Modules linked in: > > [ 11.596199] CPU: 1 PID: 1 Comm: systemd Not tainted 4.4.0-rc1+ #196 > > [ 11.596689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014 > > [ 11.597632] ffffffff81f66d8b ffff88007c04bb90 ffffffff8155ccdc 0000000000000000 > > [ 11.598234] ffff88007c04bbc8 ffffffff810de202 ffff8800793dda00 ffff88007a096800 > > [ 11.598877] ffff88007c04bc80 ffff88007a6b6200 0000000000000001 ffff88007c04bbd8 > > [ 11.599547] Call Trace: > > [ 11.599784] [] dump_stack+0x4e/0x82 > > [ 11.600197] [] warn_slowpath_common+0x82/0xc0 > > [ 11.600705] [] warn_slowpath_null+0x1a/0x20 > > [ 11.601208] [] pids_cancel.constprop.6+0x31/0x40 > > [ 11.601764] [] pids_can_attach+0x6d/0xf0 > > Yeah, this is a known problem regarding css's lifetime. Working on > it. The earlier dump, I think, is likely to have been caused by the > same issue. Just posted the fix for this issue. Can you please verify the fix? http://lkml.kernel.org/g/20151123195541.GA19072@mtj.duckdns.org Thanks a lot! -- tejun