linux-kernel - Re: INFO: task hung in rtnetlink_rcv

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Date:   Mon, 25 Feb 2019 08:55:40 -0800
From:   Joe Perches <joe@...ches.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        syzbot <syzbot+8218a8a0ff60c19b8eae@...kaller.appspotmail.com>,
        ast@...nel.org, christian@...uner.io, davem@...emloft.net,
        dsahern@...il.com, hawk@...nel.org, idosch@...lanox.com,
        john.fastabend@...il.com, kafai@...com, ktkhai@...tuozzo.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        petrm@...lanox.com, roopa@...ulusnetworks.com,
        songliubraving@...com, syzkaller-bugs@...glegroups.com,
        xdp-newbies@...r.kernel.org, yhs@...com
Subject: Re: INFO: task hung in rtnetlink_rcv_msg

On Mon, 2019-02-25 at 09:39 +0100, Jesper Dangaard Brouer wrote:
> On Sat, 23 Feb 2019 01:47:00 +0100
> Daniel Borkmann <daniel@...earbox.net> wrote:
> 
> > On 02/22/2019 10:45 PM, Jakub Kicinski wrote:
> > > On Fri, 22 Feb 2019 12:14:57 -0800, Joe Perches wrote:  
> > > > On Fri, 2019-02-22 at 12:01 -0800, Jakub Kicinski wrote:  
> > > > > Hi!
> > > > > 
> > > > > Seems like something funny is going on with get_maintainer.pl since XDP
> > > > > entry got added.  We seem to have been CCed on:    
> > > > 
> > > > I suggest removing the MAINTAINERS line with
> > > > 
> > > > 	K:	xdp
> > > > 
> > > > as xdp is a pretty generic file/patch content
> > > > regex match for the K: type
> > > > 
> > > > $ git grep --name-only xdp | wc -l
> > > > 236
> 
> I'm unsure how K: works, but you grep definitely selects some wrong files.
> 
> I tried with "xdp_":
>  git grep --name-only xdp_
> 
> That does catch all the driver that have XDP support, which is the
> point of the exercise (to catch drivers).
> 
> It does contain a couple of false-positives:
>   drivers/net/ethernet/neterion/vxge/vxge-traffic.c
>   drivers/thunderbolt/tb_msgs.h
>   drivers/thunderbolt/xdomain.c
>   sound/soc/codecs/rt5670.c
> 
> Via the pattern '[^a-z]xdp_' I'm only left with the thunderbolt
> false-positive, as it have a data struct's called tb_xdp_*.

Then it's probably better to use

K:	\Wxdp_

and if XDP_ is also to be matched, maybe

K:	(?i:\Wxdp_)