On Tue, 22 Dec 2009, Andi Kleen wrote:

quoted

[    5.304749] BUG: unable to handle kernel NULL pointer dereference at 000000000000001f
..
[    5.308739] Call Trace:
[    5.308739]  [<ffffffff810c3840>] kstrdup+0x40/0x70
[    5.308739]  [<ffffffff81150d77>] sysfs_new_dirent+0xf7/0x110
[    5.308739]  [<ffffffff8115121d>] create_dir+0x3d/0xc0
[    5.308739]  [<ffffffff81090af1>] ? autoremove_wake_function+0x11/0x40
[    5.308739]  [<ffffffff811512d4>] sysfs_create_dir+0x34/0x50
[    5.308739]  [<ffffffff8138e7ea>] ? kobject_get+0x1a/0x30
[    5.308739]  [<ffffffff8138e961>] kobject_add_internal+0xe1/0x1e0
[    5.308739]  [<ffffffff8138eb78>] kobject_add_varg+0x38/0x60
[    5.308739]  [<ffffffff8138ec15>] kobject_init_and_add+0x75/0x90
[    5.308739]  [<ffffffff81150560>] ? sysfs_ilookup_test+0x0/0x20
[    5.308739]  [<ffffffff8115082d>] ? sysfs_find_dirent+0x2d/0x40
[    5.308739]  [<ffffffff81150ec1>] ? sysfs_addrm_finish+0x21/0x250
[    5.308739]  [<ffffffff8138e7ea>] ? kobject_get+0x1a/0x30
[    5.308739]  [<ffffffff810e6fe4>] ? kmem_cache_alloc+0x84/0xc0
[    5.308739]  [<ffffffff814238d4>] bus_add_driver+0x94/0x260
[    5.308739]  [<ffffffff81424ed9>] driver_register+0x79/0x160
[    5.308739]  [<ffffffff815a28a3>] __hid_register_driver+0x43/0x80
[    5.308739]  [<ffffffff81a3d7ff>] ? gyration_init+0x0/0x1b
[    5.308739]  [<ffffffff81a3d818>] gyration_init+0x19/0x1b

Seems to be caused by the "gyration driver" whatever that is. Do you
have such a USB device?  

Doubtful.

It could be some module mismatch, it looks suspicious
and from a quick look the gyration driver does nothing bad 
in that init path. Try a make clean and remove/rebuild/reinstall all the modules
on the target system.

If that doesn't help perhaps disable CONFIG_HID_GYRATION,
but from your other oops something more seems to be broken anyways.

This is a static kernel - no module support.  Anyway, I also tried
without CONFIG_USB_HID (which pulls in all the other HID_* things) but
no luck.

-- 
                           |  .''`.  ** Debian GNU/Linux **
      Peter Palfrader      | : :' :      The  universal
 http://www.palfrader.org/ | `. `'      Operating System
                           |   `-    http://www.debian.org/