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Date: Wed, 10 Jan 2007 11:49:37 +0100
From: Pavel Machek <pavel@....cz>
To: kernel list <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...l.org>, Greg KH <greg@...ah.com>
Subject: 2.6.20-rc4: null pointer deref in khubd
Hi!
I have half broken usb device here, very useful at breaking linux usb
stack:
(Is it softlockup watchdog triggering in the middle of oops? Do we
take too long to oops or what?)
Pavel
...
PM: Adding info for usb:2-1:1.0
usb0: register 'cdc_ether' at usb-0000:00:1d.0-1, CDC Ethernet Device, c2:3a:65:0e:e0:f7
PM: Adding info for No Bus:usbdev2.60_ep83
PM: Adding info for usb:2-1:1.1
PM: Adding info for No Bus:usbdev2.60_ep81
PM: Adding info for No Bus:usbdev2.60_ep02
PM: Adding info for mmc:mmc0:0001
mmcblk0: mmc0:0001 IFX128 125440KiB
mmcblk0: p1 p2 p3
EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended
usb 2-1: USB disconnect, address 60
PM: Removing info for No Bus:usbdev2.60_ep83
usb0: unregister 'cdc_ether' usb-0000:00:1d.0-1, CDC Ethernet Device
PM: Removing info for usb:2-1:1.0
PM: Removing info for No Bus:usbdev2.60_ep81
PM: Removing info for No Bus:usbdev2.60_ep02
PM: Removing info for usb:2-1:1.1
PM: Removing info for No Bus:usbdev2.60_ep00
PM: Removing info for usb:2-1
usb 2-1: new full speed USB device using uhci_hcd and address 61
usb 2-1: device descriptor read/64, error -71
PM: Removing info for mmc:mmc0:0001
usb 2-1: new full speed USB device using uhci_hcd and address 62
usb 2-1: device descriptor read/64, error -71
usb 2-1: new full speed USB device using uhci_hcd and address 63
usb 2-1: new full speed USB device using uhci_hcd and address 64
usb 2-1: new full speed USB device using uhci_hcd and address 65
usb 2-1: new full speed USB device using uhci_hcd and address 66
usb 2-1: device descriptor read/all, error -71
usb 2-1: new full speed USB device using uhci_hcd and address 68
usb 2-1: USB disconnect, address 68
usb 2-1: unable to read config index 0 descriptor/start
usb 2-1: chopping to 0 config(s)
usb 2-1: string descriptor 0 read error: -19
usb 2-1: string descriptor 0 read error: -19
PM: Adding info for usb:2-1
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000010
printing eip:
c0610784
*pde = 00000000
PM: Adding info for No Bus:usbdev2.68_ep00
usb 2-1: no configuration chosen from 0 choices
BUG: soft lockup detected on CPU#1!
[<c014d4c9>] softlockup_tick+0xa9/0xd0
[<c0131393>] update_process_times+0x33/0x80
[<c011ab7b>] smp_apic_timer_interrupt+0x6b/0x80
[<c0103aa4>] apic_timer_interrupt+0x28/0x30
[<c02558b4>] delay_tsc+0x14/0x20
[<c02558f6>] __delay+0x6/0x10
[<c011fbbb>] do_page_fault+0x35b/0x600
[<c011f860>] do_page_fault+0x0/0x600
[<c061352c>] error_code+0x7c/0x84
[<c0610784>] klist_del+0x14/0x50
[<c0328edb>] device_del+0x1b/0x1c0
[<c044c2a1>] usb_disconnect+0xb1/0x120
[<c044ec4a>] hub_thread+0x3ca/0xe00
[<c0120ab1>] __activate_task+0x21/0x40
[<c01238af>] try_to_wake_up+0x3f/0x420
[<c013c6c0>] autoremove_wake_function+0x0/0x50
[<c044e880>] hub_thread+0x0/0xe00
[<c013c60c>] kthread+0xec/0xf0
[<c013c520>] kthread+0x0/0xf0
[<c0103be7>] kernel_thread_helper+0x7/0x10
=======================
Oops: 0000 [#1]
SMP
Modules linked in: usbserial
CPU: 1
EIP: 0060:[<c0610784>] Not tainted VLI
EFLAGS: 00010292 (2.6.20-rc4 #387)
EIP is at klist_del+0x14/0x50
eax: 00000000 ebx: 00000000 ecx: 0000000f edx: 00000000
esi: 0000007c edi: df17c4f4 ebp: df17c5c8 esp: c21b3ea4
ds: 007b es: 007b ss: 0068
Process khubd (pid: 304, ti=c21b2000 task=c2264030 task.ti=c21b2000)
Stack: df17c504 0000007c df17c4e0 c0328edb f79f76d0 df17c504 0000007c df17c488
df17c5c8 c044c2a1 c0735194 c0704518 df17c598 00000044 f79f78f8 df17c4e0
c21ffd1c c2251b50 f79f7678 c21ffd04 c044ec4a c21b3fb0 0000000a c21b3f10
Call Trace:
[<c0328edb>] device_del+0x1b/0x1c0
[<c044c2a1>] usb_disconnect+0xb1/0x120
[<c044ec4a>] hub_thread+0x3ca/0xe00
[<c0120ab1>] __activate_task+0x21/0x40
[<c01238af>] try_to_wake_up+0x3f/0x420
[<c013c6c0>] autoremove_wake_function+0x0/0x50
[<c044e880>] hub_thread+0x0/0xe00
[<c013c60c>] kthread+0xec/0xf0
[<c013c520>] kthread+0x0/0xf0
[<c0103be7>] kernel_thread_helper+0x7/0x10
=======================
Code: 04 89 46 04 89 4a 04 89 11 c6 03 01 8b 1c 24 8b 74 24 04 83 c4 08 c3 83 ec 0c 89 7c 24 08 89 c7 89 1c 24 89 74 24 04 8b 18 89 d8 <8b> 73 10 e8 f4 29 00 00 89 f8 e8 ad fe ff ff 85 c0 b8 00 00 00
EIP: [<c0610784>] klist_del+0x14/0x50 SS:ESP 0068:c21b3ea4
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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