Oops at get_kobj_path_length with 2.6.5/2.6.6 on boot/resume
From: David Weinehall (tao_at_acc.umu.se)
Date: 05/31/04
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Date: Mon, 31 May 2004 16:43:48 +0200 To: Linux-Kernel Mailing List <linux-kernel@vger.kernel.org>
I've experienced this oops several times with both 2.6.5 and 2.6.6
(Debian-variant of the kernel, have not yet tried the non-Debian
variant, but I will unless someone can spot something obviously
wrong helped by this oops-dump...)
The context is usually bootup or resume, possibly also hotplug from
docking station. The computer is an IBM Thinkpad T40.
Restarting tasks...<6>usb 4-1: USB disconnect, address 2
Unable to handle kernel NULL pointer dereference at virtual address
00000000
printing eip:
c01a0486
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
CPU: 0
EIP: 0060:[<c01a0486>] Not tainted
EFLAGS: 00010246 (2.6.6-1-686)
EIP is at get_kobj_path_length+0x26/0x40
eax: 00000000 ebx: 00000000 ecx: ffffffff edx: de909138
esi: 00000001 edi: 00000000 ebp: ffffffff esp: de7e1dfc
ds: 007b es: 007b ss: 0068
Process khubd (pid: 1720, threadinfo=de7e0000 task=de83a270)
Stack: 0000015b d5176819 d5176800 dfb5b090 c01a0652 c02ec560 de909138 0000015b
e0b2f040 c01615ed de7e1e3c d5176800 00000000 c02b44a0 e0b29d91 00000000
c0169f51 de909138 de909130 e0b2efe0 e0b2f040 c01a07f7 c028f726 c02ec560
Call Trace:
[<c01a0652>] kset_hotplug+0x152/0x290
[<c01615ed>] lookup_hash+0x1d/0x30
[<c0169f51>] dput+0x31/0x220
[<c01a07f7>] kobject_hotplug+0x67/0x70
[<c01a0b6b>] kobject_del+0x1b/0x40
[<c01eff40>] class_device_del+0x90/0xc0
[<e0b24f90>] hci_unregister_dev+0x10/0x90 [bluetooth]
[<e0a90b75>] hci_usb_disconnect+0x35/0x90 [hci_usb]
[<e0aa1106>] usb_unbind_interface+0x76/0x80 [usbcore]
[<c01ef256>] device_release_driver+0x66/0x70
[<c01ef395>] bus_remove_device+0x55/0xa0
[<c01ee28d>] device_del+0x5d/0xa0
[<c01ee2e3>] device_unregister+0x13/0x30
[<e0aa7360>] usb_disable_device+0x70/0xb0 [usbcore]
[<e0aa1d24>] usb_disconnect+0x94/0xf0 [usbcore]
[<e0aa3f41>] hub_port_connect_change+0x281/0x290 [usbcore]
[<e0aa38e3>] hub_port_status+0x43/0xb0 [usbcore]
[<e0aa4217>] hub_events+0x2c7/0x340 [usbcore]
[<e0aa42c5>] hub_thread+0x35/0x100 [usbcore]
[<c0105f52>] ret_from_fork+0x6/0x14
[<c01187d0>] default_wake_function+0x0/0x20
[<e0aa4290>] hub_thread+0x0/0x100 [usbcore]
[<c01042ad>] kernel_thread_helper+0x5/0x18
Code: f2 ae f7 d1 49 8b 52 24 8d 74 31 01 85 d2 75 ea 5b 89 f0 5e
Regards: David Weinehall
-- /) David Weinehall <tao@acc.umu.se> /) Northern lights wander (\ // Maintainer of the v2.0 kernel // Dance across the winter sky // \) http://www.acc.umu.se/~tao/ (/ Full colour fire (/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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