2009-04-08 05:05:40

by Justin Madru

[permalink] [raw]
Subject: 2.6.30-rc1: OOPS on usb disk insert

Hello,

Testing out .30-rc1 and usb devises don't work. I insert my flash disk
and get this oops.
More information (dmesg, config, etc.) at
http://jdserver.homelinux.org/bugreports/003/

usb 5-3: new high speed USB device using ehci_hcd and address 2
usb 5-3: configuration #1 chosen from 1 choice
Initializing USB Mass Storage driver...
scsi2 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usb-storage: device scan complete
scsi 2:0:0:0: Direct-Access SanDisk Cruzer Micro 8.01 PQ: 0
ANSI: 0 CCS
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<(null)>] (null)
*pde = 00000000
Oops: 0000 [#2] PREEMPT SMP
last sysfs file:
/sys/devices/pci0000:00/0000:00:1e.0/0000:03:00.0/ssb0:0/net/eth0/statistics/collisions
Modules linked in: usb_storage i915 cfbcopyarea cfbimgblt cfbfillrect
binfmt_misc acpi_cpufreq container sbs cpufreq_powersave pci_slot
cpufreq_stats cpufreq_userspace sbshc cpufreq_conservative ext3 jbd
mbcache firewire_sbp2 ecb cryptomgr aead pcompress crypto_blkcipher
crypto_hash crypto_algapi dell_laptop snd_hda_codec_idt evdev iwl3945
iwlcore rfkill sdhci_pci dcdbas video backlight rtc_cmos snd_hda_intel
fb output sdhci rtc_core rtc_lib mac80211 snd_hda_codec snd_hwdep
snd_pcm_oss snd_mixer_oss mmc_core psmouse snd_pcm battery ac button
processor intel_agp snd_page_alloc reiserfs crc32 sr_mod cdrom sg
firewire_ohci firewire_core crc_itu_t ata_piix ehci_hcd uhci_hcd usbcore
thermal fan

Pid: 5579, comm: scsi_scan_2 Tainted: G D (2.6.30-rc1-git #1)
MM061
EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 0
EIP is at 0x0
EAX: f7117fb0 EBX: f7117fb0 ECX: 00000000 EDX: 00000003
ESI: b8023874 EDI: 00000000 EBP: e4432dd4 ESP: e4432dac
DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Process scsi_scan_2 (pid: 5579, ti=e4432000 task=ee7b3bb0 task.ti=e4432000)
Stack:
c012a8af 00000000 00000001 00000003 c04f22d8 00000282 c04f22dc 00000005
00000000 ee42ea20 e4432e00 c015e8b9 00000000 c0240d8d c04f22f8 f6527b00
c02ff2d0 00000080 ffffffff f6527b00 e445c60e e4432e08 c015e93d e4432e44
Call Trace:
[<c012a8af>] ? __wake_up+0x4f/0x80
[<c015e8b9>] ? __async_schedule+0x139/0x1a0
[<c0240d8d>] ? ida_pre_get+0x11d/0x150
[<c02ff2d0>] ? sd_probe_async+0x0/0x270
[<c015e93d>] ? async_schedule+0xd/0x10
[<c02ff748>] ? sd_probe+0x208/0x2a0
[<c02e6df6>] ? really_probe+0x156/0x220
[<c02e6fbc>] ? __device_attach+0x4c/0x60
[<c02e5b0b>] ? bus_for_each_drv+0x5b/0x80
[<c02e6c7b>] ? device_attach+0xeb/0x110
[<c02e6f70>] ? __device_attach+0x0/0x60
[<c02e5a7f>] ? bus_attach_device+0x3f/0x70
[<c02e442e>] ? device_add+0x65e/0x830
[<c02ea8e0>] ? transport_configure+0x0/0x30
[<c02fb3b2>] ? scsi_sysfs_add_sdev+0x62/0x2a0
[<c0241592>] ? kobject_get+0x12/0x20
[<c02f779d>] ? scsi_finish_async_scan+0x11d/0x160
[<c02f9920>] ? do_scan_async+0x0/0x90
[<c02f9978>] ? do_scan_async+0x58/0x90
[<c02f9920>] ? do_scan_async+0x0/0x90
[<c015558c>] ? kthread+0x3c/0x70
[<c0155550>] ? kthread+0x0/0x70
[<c0103f5f>] ? kernel_thread_helper+0x7/0x18
Code: Bad EIP value.
EIP: [<00000000>] 0x0 SS:ESP 0068:e4432dac
CR2: 0000000000000000
---[ end trace fefef3dd1f6b4bd0 ]---
note: scsi_scan_2[5579] exited with preempt_count 1

Justin Madru


2009-04-08 05:41:56

by Andrew Morton

[permalink] [raw]
Subject: Re: 2.6.30-rc1: OOPS on usb disk insert

(cc linux-scsi and linux-usb)

On Tue, 07 Apr 2009 22:05:24 -0700 Justin Madru <[email protected]> wrote:

> Hello,
>
> Testing out .30-rc1 and usb devises don't work. I insert my flash disk
> and get this oops.
> More information (dmesg, config, etc.) at
> http://jdserver.homelinux.org/bugreports/003/

It looks the async code blew up.

> usb 5-3: new high speed USB device using ehci_hcd and address 2
> usb 5-3: configuration #1 chosen from 1 choice
> Initializing USB Mass Storage driver...
> scsi2 : SCSI emulation for USB Mass Storage devices
> usb-storage: device found at 2
> usb-storage: waiting for device to settle before scanning
> usbcore: registered new interface driver usb-storage
> USB Mass Storage support registered.
> usb-storage: device scan complete
> scsi 2:0:0:0: Direct-Access SanDisk Cruzer Micro 8.01 PQ: 0
> ANSI: 0 CCS
> BUG: unable to handle kernel NULL pointer dereference at (null)
> IP: [<(null)>] (null)

The kernel tried to execute code at 0x00000000

> *pde = 00000000
> Oops: 0000 [#2] PREEMPT SMP
> last sysfs file:
> /sys/devices/pci0000:00/0000:00:1e.0/0000:03:00.0/ssb0:0/net/eth0/statistics/collisions
> Modules linked in: usb_storage i915 cfbcopyarea cfbimgblt cfbfillrect
> binfmt_misc acpi_cpufreq container sbs cpufreq_powersave pci_slot
> cpufreq_stats cpufreq_userspace sbshc cpufreq_conservative ext3 jbd
> mbcache firewire_sbp2 ecb cryptomgr aead pcompress crypto_blkcipher
> crypto_hash crypto_algapi dell_laptop snd_hda_codec_idt evdev iwl3945
> iwlcore rfkill sdhci_pci dcdbas video backlight rtc_cmos snd_hda_intel
> fb output sdhci rtc_core rtc_lib mac80211 snd_hda_codec snd_hwdep
> snd_pcm_oss snd_mixer_oss mmc_core psmouse snd_pcm battery ac button
> processor intel_agp snd_page_alloc reiserfs crc32 sr_mod cdrom sg
> firewire_ohci firewire_core crc_itu_t ata_piix ehci_hcd uhci_hcd usbcore
> thermal fan
>
> Pid: 5579, comm: scsi_scan_2 Tainted: G D (2.6.30-rc1-git #1)
> MM061
> EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 0
> EIP is at 0x0
> EAX: f7117fb0 EBX: f7117fb0 ECX: 00000000 EDX: 00000003
> ESI: b8023874 EDI: 00000000 EBP: e4432dd4 ESP: e4432dac
> DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> Process scsi_scan_2 (pid: 5579, ti=e4432000 task=ee7b3bb0 task.ti=e4432000)
> Stack:
> c012a8af 00000000 00000001 00000003 c04f22d8 00000282 c04f22dc 00000005
> 00000000 ee42ea20 e4432e00 c015e8b9 00000000 c0240d8d c04f22f8 f6527b00
> c02ff2d0 00000080 ffffffff f6527b00 e445c60e e4432e08 c015e93d e4432e44
> Call Trace:
> [<c012a8af>] ? __wake_up+0x4f/0x80
> [<c015e8b9>] ? __async_schedule+0x139/0x1a0
> [<c0240d8d>] ? ida_pre_get+0x11d/0x150
> [<c02ff2d0>] ? sd_probe_async+0x0/0x270
> [<c015e93d>] ? async_schedule+0xd/0x10
> [<c02ff748>] ? sd_probe+0x208/0x2a0
> [<c02e6df6>] ? really_probe+0x156/0x220
> [<c02e6fbc>] ? __device_attach+0x4c/0x60
> [<c02e5b0b>] ? bus_for_each_drv+0x5b/0x80
> [<c02e6c7b>] ? device_attach+0xeb/0x110
> [<c02e6f70>] ? __device_attach+0x0/0x60
> [<c02e5a7f>] ? bus_attach_device+0x3f/0x70
> [<c02e442e>] ? device_add+0x65e/0x830
> [<c02ea8e0>] ? transport_configure+0x0/0x30
> [<c02fb3b2>] ? scsi_sysfs_add_sdev+0x62/0x2a0
> [<c0241592>] ? kobject_get+0x12/0x20
> [<c02f779d>] ? scsi_finish_async_scan+0x11d/0x160
> [<c02f9920>] ? do_scan_async+0x0/0x90
> [<c02f9978>] ? do_scan_async+0x58/0x90
> [<c02f9920>] ? do_scan_async+0x0/0x90
> [<c015558c>] ? kthread+0x3c/0x70
> [<c0155550>] ? kthread+0x0/0x70
> [<c0103f5f>] ? kernel_thread_helper+0x7/0x18
> Code: Bad EIP value.
> EIP: [<00000000>] 0x0 SS:ESP 0068:e4432dac
> CR2: 0000000000000000

The trace appears to be claiming that kernel/async.c:async_new.func is
NULL.

But it cannot be - it's initialised at compilation time. Unless
something scribbled on it of course.

Cute. This might require a bisection search unless someone can see
something which I missed?

2009-04-08 06:07:47

by Justin Madru

[permalink] [raw]
Subject: Re: 2.6.30-rc1: OOPS on usb disk insert

Andrew Morton wrote:
> (cc linux-scsi and linux-usb)
>
> On Tue, 07 Apr 2009 22:05:24 -0700 Justin Madru <[email protected]> wrote:
>
>
>> Hello,
>>
>> Testing out .30-rc1 and usb devises don't work. I insert my flash disk
>> and get this oops.
>> More information (dmesg, config, etc.) at
>> http://jdserver.homelinux.org/bugreports/003/
>>
>
> It looks the async code blew up.
>
>
>> usb 5-3: new high speed USB device using ehci_hcd and address 2
>> usb 5-3: configuration #1 chosen from 1 choice
>> Initializing USB Mass Storage driver...
>> scsi2 : SCSI emulation for USB Mass Storage devices
>> usb-storage: device found at 2
>> usb-storage: waiting for device to settle before scanning
>> usbcore: registered new interface driver usb-storage
>> USB Mass Storage support registered.
>> usb-storage: device scan complete
>> scsi 2:0:0:0: Direct-Access SanDisk Cruzer Micro 8.01 PQ: 0
>> ANSI: 0 CCS
>> BUG: unable to handle kernel NULL pointer dereference at (null)
>> IP: [<(null)>] (null)
>>
>
> The kernel tried to execute code at 0x00000000
>
>
>> *pde = 00000000
>> Oops: 0000 [#2] PREEMPT SMP
>> last sysfs file:
>> /sys/devices/pci0000:00/0000:00:1e.0/0000:03:00.0/ssb0:0/net/eth0/statistics/collisions
>> Modules linked in: usb_storage i915 cfbcopyarea cfbimgblt cfbfillrect
>> binfmt_misc acpi_cpufreq container sbs cpufreq_powersave pci_slot
>> cpufreq_stats cpufreq_userspace sbshc cpufreq_conservative ext3 jbd
>> mbcache firewire_sbp2 ecb cryptomgr aead pcompress crypto_blkcipher
>> crypto_hash crypto_algapi dell_laptop snd_hda_codec_idt evdev iwl3945
>> iwlcore rfkill sdhci_pci dcdbas video backlight rtc_cmos snd_hda_intel
>> fb output sdhci rtc_core rtc_lib mac80211 snd_hda_codec snd_hwdep
>> snd_pcm_oss snd_mixer_oss mmc_core psmouse snd_pcm battery ac button
>> processor intel_agp snd_page_alloc reiserfs crc32 sr_mod cdrom sg
>> firewire_ohci firewire_core crc_itu_t ata_piix ehci_hcd uhci_hcd usbcore
>> thermal fan
>>
>> Pid: 5579, comm: scsi_scan_2 Tainted: G D (2.6.30-rc1-git #1)
>> MM061
>> EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 0
>> EIP is at 0x0
>> EAX: f7117fb0 EBX: f7117fb0 ECX: 00000000 EDX: 00000003
>> ESI: b8023874 EDI: 00000000 EBP: e4432dd4 ESP: e4432dac
>> DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
>> Process scsi_scan_2 (pid: 5579, ti=e4432000 task=ee7b3bb0 task.ti=e4432000)
>> Stack:
>> c012a8af 00000000 00000001 00000003 c04f22d8 00000282 c04f22dc 00000005
>> 00000000 ee42ea20 e4432e00 c015e8b9 00000000 c0240d8d c04f22f8 f6527b00
>> c02ff2d0 00000080 ffffffff f6527b00 e445c60e e4432e08 c015e93d e4432e44
>> Call Trace:
>> [<c012a8af>] ? __wake_up+0x4f/0x80
>> [<c015e8b9>] ? __async_schedule+0x139/0x1a0
>> [<c0240d8d>] ? ida_pre_get+0x11d/0x150
>> [<c02ff2d0>] ? sd_probe_async+0x0/0x270
>> [<c015e93d>] ? async_schedule+0xd/0x10
>> [<c02ff748>] ? sd_probe+0x208/0x2a0
>> [<c02e6df6>] ? really_probe+0x156/0x220
>> [<c02e6fbc>] ? __device_attach+0x4c/0x60
>> [<c02e5b0b>] ? bus_for_each_drv+0x5b/0x80
>> [<c02e6c7b>] ? device_attach+0xeb/0x110
>> [<c02e6f70>] ? __device_attach+0x0/0x60
>> [<c02e5a7f>] ? bus_attach_device+0x3f/0x70
>> [<c02e442e>] ? device_add+0x65e/0x830
>> [<c02ea8e0>] ? transport_configure+0x0/0x30
>> [<c02fb3b2>] ? scsi_sysfs_add_sdev+0x62/0x2a0
>> [<c0241592>] ? kobject_get+0x12/0x20
>> [<c02f779d>] ? scsi_finish_async_scan+0x11d/0x160
>> [<c02f9920>] ? do_scan_async+0x0/0x90
>> [<c02f9978>] ? do_scan_async+0x58/0x90
>> [<c02f9920>] ? do_scan_async+0x0/0x90
>> [<c015558c>] ? kthread+0x3c/0x70
>> [<c0155550>] ? kthread+0x0/0x70
>> [<c0103f5f>] ? kernel_thread_helper+0x7/0x18
>> Code: Bad EIP value.
>> EIP: [<00000000>] 0x0 SS:ESP 0068:e4432dac
>> CR2: 0000000000000000
>>
>
> The trace appears to be claiming that kernel/async.c:async_new.func is
> NULL.
>
> But it cannot be - it's initialised at compilation time. Unless
> something scribbled on it of course.
>
> Cute. This might require a bisection search unless someone can see
> something which I missed?
>
>
Well, since it's consistently repeatable, a bisection shouldn't be too
painful.
I'll try to do that tomorrow.

Justin Madru

2009-04-08 13:26:15

by Kay Sievers

[permalink] [raw]
Subject: Re: 2.6.30-rc1: OOPS on usb disk insert

On Tue, Apr 7, 2009 at 23:07, Justin Madru <[email protected]> wrote:
> Andrew Morton wrote:
>> On Tue, 07 Apr 2009 22:05:24 -0700 Justin Madru <[email protected]> wrote:

>>> Testing out .30-rc1 and usb devises don't work. I insert my flash disk
>>> and get this oops.

>> The trace appears to be claiming that kernel/async.c:async_new.func is
>> NULL.
>>
>> But it cannot be - it's initialised at compilation time.  Unless
>> something scribbled on it of course.

I've seen async problems with other subsystem too, maybe caused by a
corruption which is fixed by:
http://patchwork.kernel.org/patch/16776/

-static void __init acpi_battery_init_async(void *unused, ...
+static void acpi_battery_init_async(void *unused, ...

Kay

2009-04-09 06:47:07

by Justin Madru

[permalink] [raw]
Subject: Re: 2.6.30-rc1: OOPS on usb disk insert

Kay Sievers wrote:
> On Tue, Apr 7, 2009 at 23:07, Justin Madru <[email protected]> wrote:
>
>> Andrew Morton wrote:
>>
>>> On Tue, 07 Apr 2009 22:05:24 -0700 Justin Madru <[email protected]> wrote:
>>>
>
>
>>>> Testing out .30-rc1 and usb devises don't work. I insert my flash disk
>>>> and get this oops.
>>>>
>
>
>>> The trace appears to be claiming that kernel/async.c:async_new.func is
>>> NULL.
>>>
>>> But it cannot be - it's initialised at compilation time. Unless
>>> something scribbled on it of course.
>>>
>
> I've seen async problems with other subsystem too, maybe caused by a
> corruption which is fixed by:
> http://patchwork.kernel.org/patch/16776/
>
> -static void __init acpi_battery_init_async(void *unused, ...
> +static void acpi_battery_init_async(void *unused, ...
>
> Kay
>
>
I've applied the following patches (to try to fix other bugs) and I no
longer get a BUG/OOPS
although the patches might have not been the cause of the fix, but
inserting the disk still doesn't works.

http://patchwork.kernel.org/patch/17199/
http://patchwork.kernel.org/patch/17025/
http://patchwork.kernel.org/patch/17039/

It now complains of: FAT: IO charset cp437 not found
Which I've found a work around by:

<insert flash disk>
syslog complains: FAT: IO charset cp437 not found
sudo modprobe -r nls_cp437
sudo modprobe -i nls_cp437
<remove then reinsert flash disk>
syslog complains: FAT: IO charset iso8859_1 not found
sudo modprobe -r nls_iso8859_1
sudo modprobe -i nls_iso8859_1
<insert flash disk>
profit!!

So, I have to insert the disk 3 times before it works. although after
that it just works, until I reboot and I have to repeat the unload/load
modules.

Justin Madru

2009-04-16 21:10:47

by Rafael J. Wysocki

[permalink] [raw]
Subject: Re: 2.6.30-rc1: OOPS on usb disk insert

On Wednesday 08 April 2009, Justin Madru wrote:
> Hello,

Hi,

> Testing out .30-rc1 and usb devises don't work. I insert my flash disk
> and get this oops.
> More information (dmesg, config, etc.) at
> http://jdserver.homelinux.org/bugreports/003/

I suppose this has been fixed in -rc2 or current git. Have you tried
after -rc1?

> usb 5-3: new high speed USB device using ehci_hcd and address 2
> usb 5-3: configuration #1 chosen from 1 choice
> Initializing USB Mass Storage driver...
> scsi2 : SCSI emulation for USB Mass Storage devices
> usb-storage: device found at 2
> usb-storage: waiting for device to settle before scanning
> usbcore: registered new interface driver usb-storage
> USB Mass Storage support registered.
> usb-storage: device scan complete
> scsi 2:0:0:0: Direct-Access SanDisk Cruzer Micro 8.01 PQ: 0
> ANSI: 0 CCS
> BUG: unable to handle kernel NULL pointer dereference at (null)
> IP: [<(null)>] (null)
> *pde = 00000000
> Oops: 0000 [#2] PREEMPT SMP
> last sysfs file:
> /sys/devices/pci0000:00/0000:00:1e.0/0000:03:00.0/ssb0:0/net/eth0/statistics/collisions
> Modules linked in: usb_storage i915 cfbcopyarea cfbimgblt cfbfillrect
> binfmt_misc acpi_cpufreq container sbs cpufreq_powersave pci_slot
> cpufreq_stats cpufreq_userspace sbshc cpufreq_conservative ext3 jbd
> mbcache firewire_sbp2 ecb cryptomgr aead pcompress crypto_blkcipher
> crypto_hash crypto_algapi dell_laptop snd_hda_codec_idt evdev iwl3945
> iwlcore rfkill sdhci_pci dcdbas video backlight rtc_cmos snd_hda_intel
> fb output sdhci rtc_core rtc_lib mac80211 snd_hda_codec snd_hwdep
> snd_pcm_oss snd_mixer_oss mmc_core psmouse snd_pcm battery ac button
> processor intel_agp snd_page_alloc reiserfs crc32 sr_mod cdrom sg
> firewire_ohci firewire_core crc_itu_t ata_piix ehci_hcd uhci_hcd usbcore
> thermal fan
>
> Pid: 5579, comm: scsi_scan_2 Tainted: G D (2.6.30-rc1-git #1)
> MM061
> EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 0
> EIP is at 0x0
> EAX: f7117fb0 EBX: f7117fb0 ECX: 00000000 EDX: 00000003
> ESI: b8023874 EDI: 00000000 EBP: e4432dd4 ESP: e4432dac
> DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> Process scsi_scan_2 (pid: 5579, ti=e4432000 task=ee7b3bb0 task.ti=e4432000)
> Stack:
> c012a8af 00000000 00000001 00000003 c04f22d8 00000282 c04f22dc 00000005
> 00000000 ee42ea20 e4432e00 c015e8b9 00000000 c0240d8d c04f22f8 f6527b00
> c02ff2d0 00000080 ffffffff f6527b00 e445c60e e4432e08 c015e93d e4432e44
> Call Trace:
> [<c012a8af>] ? __wake_up+0x4f/0x80
> [<c015e8b9>] ? __async_schedule+0x139/0x1a0
> [<c0240d8d>] ? ida_pre_get+0x11d/0x150
> [<c02ff2d0>] ? sd_probe_async+0x0/0x270
> [<c015e93d>] ? async_schedule+0xd/0x10
> [<c02ff748>] ? sd_probe+0x208/0x2a0
> [<c02e6df6>] ? really_probe+0x156/0x220
> [<c02e6fbc>] ? __device_attach+0x4c/0x60
> [<c02e5b0b>] ? bus_for_each_drv+0x5b/0x80
> [<c02e6c7b>] ? device_attach+0xeb/0x110
> [<c02e6f70>] ? __device_attach+0x0/0x60
> [<c02e5a7f>] ? bus_attach_device+0x3f/0x70
> [<c02e442e>] ? device_add+0x65e/0x830
> [<c02ea8e0>] ? transport_configure+0x0/0x30
> [<c02fb3b2>] ? scsi_sysfs_add_sdev+0x62/0x2a0
> [<c0241592>] ? kobject_get+0x12/0x20
> [<c02f779d>] ? scsi_finish_async_scan+0x11d/0x160
> [<c02f9920>] ? do_scan_async+0x0/0x90
> [<c02f9978>] ? do_scan_async+0x58/0x90
> [<c02f9920>] ? do_scan_async+0x0/0x90
> [<c015558c>] ? kthread+0x3c/0x70
> [<c0155550>] ? kthread+0x0/0x70
> [<c0103f5f>] ? kernel_thread_helper+0x7/0x18
> Code: Bad EIP value.
> EIP: [<00000000>] 0x0 SS:ESP 0068:e4432dac
> CR2: 0000000000000000
> ---[ end trace fefef3dd1f6b4bd0 ]---
> note: scsi_scan_2[5579] exited with preempt_count 1

Rafael

2009-04-17 03:19:28

by Justin Madru

[permalink] [raw]
Subject: Re: 2.6.30-rc1: OOPS on usb disk insert

Rafael J. Wysocki wrote:
> On Wednesday 08 April 2009, Justin Madru wrote:
>
>> Hello,
>>
>
> Hi,
>
>
>> Testing out .30-rc1 and usb devises don't work. I insert my flash disk
>> and get this oops.
>> More information (dmesg, config, etc.) at
>> http://jdserver.homelinux.org/bugreports/003/
>>
>
> I suppose this has been fixed in -rc2 or current git. Have you tried
> after -rc1?
>
>
>> usb 5-3: new high speed USB device using ehci_hcd and address 2
>> usb 5-3: configuration #1 chosen from 1 choice
>> Initializing USB Mass Storage driver...
>> scsi2 : SCSI emulation for USB Mass Storage devices
>> usb-storage: device found at 2
>> usb-storage: waiting for device to settle before scanning
>> usbcore: registered new interface driver usb-storage
>> USB Mass Storage support registered.
>> usb-storage: device scan complete
>> scsi 2:0:0:0: Direct-Access SanDisk Cruzer Micro 8.01 PQ: 0
>> ANSI: 0 CCS
>> BUG: unable to handle kernel NULL pointer dereference at (null)
>> IP: [<(null)>] (null)
>> *pde = 00000000
>> Oops: 0000 [#2] PREEMPT SMP
>> last sysfs file:
>> /sys/devices/pci0000:00/0000:00:1e.0/0000:03:00.0/ssb0:0/net/eth0/statistics/collisions
>> Modules linked in: usb_storage i915 cfbcopyarea cfbimgblt cfbfillrect
>> binfmt_misc acpi_cpufreq container sbs cpufreq_powersave pci_slot
>> cpufreq_stats cpufreq_userspace sbshc cpufreq_conservative ext3 jbd
>> mbcache firewire_sbp2 ecb cryptomgr aead pcompress crypto_blkcipher
>> crypto_hash crypto_algapi dell_laptop snd_hda_codec_idt evdev iwl3945
>> iwlcore rfkill sdhci_pci dcdbas video backlight rtc_cmos snd_hda_intel
>> fb output sdhci rtc_core rtc_lib mac80211 snd_hda_codec snd_hwdep
>> snd_pcm_oss snd_mixer_oss mmc_core psmouse snd_pcm battery ac button
>> processor intel_agp snd_page_alloc reiserfs crc32 sr_mod cdrom sg
>> firewire_ohci firewire_core crc_itu_t ata_piix ehci_hcd uhci_hcd usbcore
>> thermal fan
>>
>> Pid: 5579, comm: scsi_scan_2 Tainted: G D (2.6.30-rc1-git #1)
>> MM061
>> EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 0
>> EIP is at 0x0
>> EAX: f7117fb0 EBX: f7117fb0 ECX: 00000000 EDX: 00000003
>> ESI: b8023874 EDI: 00000000 EBP: e4432dd4 ESP: e4432dac
>> DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
>> Process scsi_scan_2 (pid: 5579, ti=e4432000 task=ee7b3bb0 task.ti=e4432000)
>> Stack:
>> c012a8af 00000000 00000001 00000003 c04f22d8 00000282 c04f22dc 00000005
>> 00000000 ee42ea20 e4432e00 c015e8b9 00000000 c0240d8d c04f22f8 f6527b00
>> c02ff2d0 00000080 ffffffff f6527b00 e445c60e e4432e08 c015e93d e4432e44
>> Call Trace:
>> [<c012a8af>] ? __wake_up+0x4f/0x80
>> [<c015e8b9>] ? __async_schedule+0x139/0x1a0
>> [<c0240d8d>] ? ida_pre_get+0x11d/0x150
>> [<c02ff2d0>] ? sd_probe_async+0x0/0x270
>> [<c015e93d>] ? async_schedule+0xd/0x10
>> [<c02ff748>] ? sd_probe+0x208/0x2a0
>> [<c02e6df6>] ? really_probe+0x156/0x220
>> [<c02e6fbc>] ? __device_attach+0x4c/0x60
>> [<c02e5b0b>] ? bus_for_each_drv+0x5b/0x80
>> [<c02e6c7b>] ? device_attach+0xeb/0x110
>> [<c02e6f70>] ? __device_attach+0x0/0x60
>> [<c02e5a7f>] ? bus_attach_device+0x3f/0x70
>> [<c02e442e>] ? device_add+0x65e/0x830
>> [<c02ea8e0>] ? transport_configure+0x0/0x30
>> [<c02fb3b2>] ? scsi_sysfs_add_sdev+0x62/0x2a0
>> [<c0241592>] ? kobject_get+0x12/0x20
>> [<c02f779d>] ? scsi_finish_async_scan+0x11d/0x160
>> [<c02f9920>] ? do_scan_async+0x0/0x90
>> [<c02f9978>] ? do_scan_async+0x58/0x90
>> [<c02f9920>] ? do_scan_async+0x0/0x90
>> [<c015558c>] ? kthread+0x3c/0x70
>> [<c0155550>] ? kthread+0x0/0x70
>> [<c0103f5f>] ? kernel_thread_helper+0x7/0x18
>> Code: Bad EIP value.
>> EIP: [<00000000>] 0x0 SS:ESP 0068:e4432dac
>> CR2: 0000000000000000
>> ---[ end trace fefef3dd1f6b4bd0 ]---
>> note: scsi_scan_2[5579] exited with preempt_count 1
>>
>
> Rafael
>
>
Yes, this has been fixed -- close the bug.
I'm currently running .30-rc2 and all is well (except for #13067).

Justin Madru