On Thu, Nov 09, 2006 at 02:51:00PM -0800, Andrew Morton wrote:
> On Thu, 9 Nov 2006 16:58:31 -0500 (EST)
> Alan Stern <[email protected]> wrote:
> > On Thu, 9 Nov 2006, Mattia Dongili wrote:
> > > On Thu, Nov 09, 2006 at 11:04:53AM -0800, Andrew Morton wrote:
> > > [...]
> > > > > [27526.232000] EIP: [<e8074e26>]
> > > > > scsi_device_dev_release_usercontext+0x36/0x100 [scsi_mod] SS:ESP
> > > > > 0068:dfdb1e3c
> > > > >
> > > > > full dmesg attached, I can test patches and provide any useful
> > > > > information if needed (just not now because the dock is at work).
> > > >
> > > > You're the second or third person to report this (to no effect, btw).
> > >
> > > oh, great. I was going to report the same (had with usb key unplug).
> > > Linux version 2.6.19-rc5-mm1-1 (mattia@tadamune) (gcc version 4.1.2 20060901 (prerelease) (Debian 4.1.1-13)) #4 SMP Wed Nov 8 22:46:11 CET 2006
> >
> > I don't know exactly where the problem lies, but I have narrowed it down.
> >
> > In drivers/scsi/sd.c:sd_probe(), the call to add_disk() increases the
> > device's refcount by 1. However in sd_remove(), the call to del_gendisk()
> > decreases the device's refcount by 2. Consequently the structure is
> > deallocated too early, causing the oops.
> >
> > Somebody who knows more than I do about add_disk() and del_gendisk() will
> > have to figure what's going wrong.
> >
>
> hm. Maybe it's the disk_sysfs_symlinks() changes.
>
> Could someone who can reproduce this please try this revert, on
> 2.6.19-rc2-mm2 through 2.6.19-rc5-mm1?
>
I confirm it fixes it for me too.
regards,
Benoit
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