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From: Bernard Pidoux <bernard.pidoux@free•fr>
To: linux-hams <linux-hams@vger•kernel.org>,
	Linux Netdev List <netdev@vger•kernel.org>
Subject: CPU: 0 Not tainted  (3.1.9+ #1) when ifconfig rose0 down
Date: Tue, 31 Jul 2012 16:11:18 +0200	[thread overview]
Message-ID: <5017E786.5000102@free.fr> (raw)

Hi,

I observe systematically a kernel panic when I try to shutdown rose0 
device using ifconfig rose0 down

This is happening on two very different ROSE implementation, one is on a 
machine with x86-64 kernel 4.6.3 on an Intel core 2 duo CPU
the other is on a RaspBerry Pi with Raspbian and 3.1.9+ wheezy kernel
recompiled with AX.25 modules (ax25, rose, netrom, 6pack, kiss) enabled.

Here is an image of the screen dump :

http://f6bvp.org/photos/rose_device_event.JPG

It can be noticed that PC is at rose_device_event and
LR is at sock_def_wakeup

One thing to be noticed is that when I close before all ROSE and AX.25 
applications, there are still a few populated sockets, probably for one 
of the program did not close the sockets properly.

I that case, does rose module should accept to shutdown rose0 device ?
However, I guess that it should not create a kernel panic due to a 
kernel NULL pointer.

I don't know what to do in order to debug that issue.

Bernard

next             reply	other threads:[~2012-07-31 14:11 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-31 14:11 Bernard Pidoux [this message]
2012-07-31 15:27 ` CPU: 0 Not tainted (3.1.9+ #1) when ifconfig rose0 down Bernard Pidoux
2012-07-31 17:58   ` folkert
2012-08-02 23:03   ` Eric W. Biederman
2012-07-31 17:56 ` folkert
2012-08-02 22:55 ` Eric W. Biederman
2012-08-03 14:32   ` folkert
2012-08-05 16:23     ` Bernard Pidoux
2012-08-05 17:23       ` Eric W. Biederman
  -- strict thread matches above, loose matches on Subject: below --
2012-08-05 17:08 Folkert van Heusden

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