netdev - Re: ax25_recvmsg lockup

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Message-Id: <20130803.134604.508965748339486186.davem@davemloft.net>
Date:	Sat, 03 Aug 2013 13:46:04 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	davej@...hat.com
Cc:	netdev@...r.kernel.org
Subject: Re: ax25_recvmsg lockup

From: Dave Jones <davej@...hat.com>
Date: Mon, 17 Jun 2013 10:28:03 -0400

> With the right arguments from userspace, reading from an ax25 socket
> can spend long enough in the kernel that it triggers the softlockup
> detector.  I hit a bunch of these traces in a trinity run that I
> left running over the weekend.

I looked at this a bunch of times and am still mystified how this
can happen.

It should be simple to diagnose since I doubt there is any real
AX25 traffic going to these sockets.

Any chance you can figure out what the arguments are that cause
this problem?  That'll probably help a lot, thanks!
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