Hi, Greg (and others):
I do not seem to be able to find an answer, sorry.

Do you happen to remember if this was fixed after 2.6.22.1:
localhost kernel: EIP is at make_class_name+0x27/0x7a

localhost kernel:  [<c05586f1>] class_device_del+0x97/0x119

localhost kernel:  [<c055877b>] class_device_unregister+0x8/0x10

localhost kernel:  [<e08735f4>] __scsi_remove_device+0x1d/0x60 [scsi_mod]

localhost kernel:  [<e08711ae>] scsi_forget_host+0x2d/0x4a [scsi_mod]

localhost kernel:  [<e086c49c>] scsi_remove_host+0x65/0xd5 [scsi_mod]

localhost kernel:  [<e0e76775>] storage_disconnect+0xe/0x16 [usb_storage]

localhost kernel:  [<c056f8b8>] usb_unbind_interface+0x44/0x85

localhost kernel:  [<c0557df7>] __device_release_driver+0x6e/0x8b
Obviously a known bug but all I see is users reporting it. In my case

it's this:

 https://bugzilla.redhat.com/show_bug.cgi?id=253424

I saw Alan giving it a try here:

 http://lkml.org/lkml/2007/7/12/259
Yours,

-- Pete

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I think this was a scsi problem that has been fixed, but don't really

remember the exact commit.
Alan, any ideas?
It would probably be good to get this into the next -stable if we can

figure out which patch did fix it.
thanks,
greg k-h

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Yes.  There are some bugs in the SCSI async-scanning code, and there is

a patch to fix them:
http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-misc-2.6.git;a=commi...
It is scheduled for 2.6.24.  For now, people can work around the bug by 
I have urged both James Bottomley and Andrew Morton to apply that patch

as soon as possible.  Neither of them paid any attention.
Alan Stern
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The bug still happens with that patch applied and CONFIG_SCSI_SCAN_ASYNC

enabled. In the marked line, class_dev->class->name is NULL and this causes

the oops in make_class_name().
static void remove_deprecated_class_device_links(struct class_device *class_dev)

{

        char *class_name;
        if (!class_dev->dev)

                return;
===>>   class_name = make_class_name(class_dev->class->name, &class_dev->kobj);

        if (class_name)

                sysfs_remove_link(&class_dev->dev->kobj, class_name);

        kfree(class_name);

}
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Can anybody provide a dmesg log showing the error on a system with

CONFIG_USB_DEBUG and CONFIG_USB_STORAGE_DEBUG enabled?
Does it still occur with 2.6.24-rc1?
Alan Stern
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On Mon, 10 Sep 2007 23:12:26 -0700,
It may be something like "removing a device before it has been

completely initialized" (class_device_unregister() racing against

class_device_register()). (Perhaps you can see if that is the case by

turning on verbose driver core and kobject debugging messages.)

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