linux-kernel - Re: Kernel BUG at fs/sysfs/file.c:552

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Date:	Fri, 11 Apr 2008 21:31:40 -0700
From:	Greg KH <greg@...ah.com>
To:	Marcus Nutzinger <marcus@...z.at>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Kernel BUG at fs/sysfs/file.c:552

On Wed, Apr 09, 2008 at 04:07:51PM +0200, Marcus Nutzinger wrote:
> Hi!
> 
> I wrote a little kernel module (a "virtual char-device") and wanted to
> create a sysfs entry for my device under /sys/devices. When using
> "device_register" and "device_create_file", I get the following kernel
> BUG message (and the module stops loading): (Kernel is 2.6.24.4)
> 
> 
> ------------[ cut here ]------------
> kernel BUG at fs/sysfs/file.c:552!
> invalid opcode: 0000 [#1] SMP
> Modules linked in: vdd nvidia(P) fuse kqemu snd_hda_intel snd_pcm_oss
> snd_mixer_oss snd_pcm i2c_i801 snd_timer snd_page_alloc snd_hwdep
> i2c_core usb_storage rtc snd intel_agp agpgart evdev
> 
> Pid: 22769, comm: modprobe Tainted: P        (2.6.24.4 #1)

With the nvidia driver, you're not going to get much help on this list
:(

> EIP: 0060:[<c0195c9d>] EFLAGS: 00010246 CPU: 0
> EIP is at sysfs_create_file+0xf/0x1d

Hm, did you create two files with the same name?

Care to post your code?

thanks,

greg k-h
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