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Date: Thu, 14 Sep 2006 14:40:39 -0700
From: Greg KH <gregkh@suse.de>
To: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org,
       linux-usb-devel@lists.sourceforge.net
Subject: Re: 2.6.18-rc6-mm2
Message-ID: <20060914214038.GA32352@suse.de>
References: <20060912000618.a2e2afc0.akpm@osdl.org> <6bffcb0e0609140411j46c20757r6eced82b53266e0f@mail.gmail.com>
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On Thu, Sep 14, 2006 at 01:11:49PM +0200, Michal Piotrowski wrote:
> On 12/09/06, Andrew Morton <akpm@osdl.org> wrote:
> >
> >ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc6/2.6.18-rc6-mm2/
> >
> 
> Kernel 2.6.18-rc6-mm2 - xfs-rename-uio_read.patch
> Built with gcc 3.4
> Reading specs from /usr/local/bin/../lib/gcc/i686-pc-linux-gnu/3.4.6/specs
> Configured with: ./configure --prefix=/usr/local/ --disable-nls
> --enable-shared --enable-languages=c --program-suffix=-3.4
> Thread model: posix
> gcc version 3.4.6
> 
> ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 17
> BUG: unable to handle kernel paging request at virtual address 5a5a5aaa
> usb usb2: configuration #1 chosen from 1 choice
> hub 2-0:1.0: USB hub found
> printing eip:
> c01f596a
> *pde = 00000000
> Oops: 0000 [#1]
> 4K_STACKS PREEMPT SMP
> last sysfs file:
> Modules linked in:
> CPU:    0
> EIP:    0060:[<c01f596a>]    Not tainted VLI
> EFLAGS: 00010202   (2.6.18-rc6-mm2 #122)
> EIP is at kref_get+0x7/0x55
> eax: 5a5a5aaa   ebx: 5a5a5aaa   ecx: c75cfe54   edx: c75cfe54
> esi: c033152f   edi: c75cfe5e   ebp: c755be20   esp: c755be18
> ds: 007b   es: 007b   ss: 0068
> Process usb-probe-<NULL (pid: 291, ti=c755b000 task=c759aab0 
> task.ti=c755b000)

You have the USB multi-threaded device probing config option
(CONFIG_USB_MULTITHREAD_PROBE) enabled, right?

Does disabling it fix this problem?

That option has been reworked by Alan Stern, and I need to intregate it
into my tree soon.  This is the first report of a problem with the
current stuff, I wonder why.

Can you send the output of /sys/proc/bus/usb/devices with the same
devices plugged in on a different, no oopsing kernel?

thanks,

greg k-h
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