2.6.29.5: Oops when unplugging Moschip 7840/7820 USB serial device

[Jeremy Fitzhardinge]

I unplugged a Moschip 7840/7820 USB serial adapter, and it oopsed.  I had been using it
with picoterm, but it was not open at the time I unplugged it.

Thanks,
        J

BUG: unable to handle kernel NULL pointer dereference at 00000000000000b4
IP: [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
PGD 12e19c067 PUD 12e19d067 PMD 0
Oops: 0002 [#1] SMP
last sysfs file: /sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq
CPU 0
Modules linked in: mos7840 usbserial joydev aes_x86_64 aes_generic hidp fuse ipt_MASQUERADE iptable_nat nf_nat rfcomm bridge stp llc bnep sco l2cap coretemp sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 cpufreq_ondemand acpi_cpufreq freq_table dm_multipath kvm_intel kvm uinput snd_hda_codec_conexant snd_hda_intel snd_hda_codec arc4 ecb snd_hwdep thinkpad_acpi iwlagn usb_storage snd_pcm hwmon btusb e1000e pcspkr iwlcore snd_timer iTCO_wdt lib80211 iTCO_vendor_support mac80211 i2c_i801 wmi snd bluetooth cfg80211 soundcore snd_page_alloc i915 drm i2c_algo_bit i2c_core video output [last unloaded: microcode]
Pid: 27, comm: khubd Not tainted 2.6.29.5-191.fc11.x86_64 #1 74542GU
RIP: 0010:[<ffffffff81029eb5>]  [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
RSP: 0018:ffff88013a413ba0  EFLAGS: 00010046
RAX: 0000000000000100 RBX: 00000000000000b4 RCX: 000000000010000f
RDX: ffff88013a413af0 RSI: 0000000000000203 RDI: 00000000000000b4
RBP: ffff88013a413ba0 R08: ffffffff815fcf28 R09: ffff880073f51c00
R10: 0000000000000003 R11: ffff88013a438818 R12: 0000000000000203
R13: ffff880073f51c10 R14: 0000000000000002 R15: 00000000000000b4
FS:  0000000000000000(0000) GS:ffffffff817b7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00000000000000b4 CR3: 000000012e199000 CR4: 00000000000026e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process khubd (pid: 27, threadinfo ffff88013a412000, task ffff88013a40ae00)
Stack:
 ffff88013a413bb0 ffffffff81029f7f ffff88013a413bd0 ffffffff813abf94
 ffff880073f51c00 0000000000000000 ffff88013a413c10 ffffffffa0399afa
 ffff88013a413c10 ffff880073f51c00 ffff880119898800 0000000000000000
Call Trace:
 [<ffffffff81029f7f>] default_spin_lock_flags+0x9/0xe
 [<ffffffff813abf94>] _spin_lock_irqsave+0x32/0x3b
 [<ffffffffa0399afa>] mos7840_shutdown+0x93/0x120 [mos7840]
 [<ffffffffa038de76>] usb_serial_disconnect+0xe9/0x152 [usbserial]
 [<ffffffff812a3d56>] usb_unbind_interface+0x6e/0xec
 [<ffffffff8125375f>] __device_release_driver+0x68/0x89
 [<ffffffff8125386f>] device_release_driver+0x26/0x33
 [<ffffffff81252de1>] bus_remove_device+0xa4/0xb9
 [<ffffffff8125165d>] device_del+0x135/0x189
 [<ffffffff812a135c>] usb_disable_device+0x96/0x10d
 [<ffffffff8129ce29>] usb_disconnect+0xa1/0x124
 [<ffffffff8129dc12>] hub_thread+0x4e1/0xe8f
 [<ffffffff8105c8d7>] ? autoremove_wake_function+0x0/0x39
 [<ffffffff8129d731>] ? hub_thread+0x0/0xe8f
 [<ffffffff8105c541>] kthread+0x4d/0x78
 [<ffffffff8101264a>] child_rip+0xa/0x20
 [<ffffffff81011f67>] ? restore_args+0x0/0x30
 [<ffffffff8105c4f4>] ? kthread+0x0/0x78
 [<ffffffff81012640>] ? child_rip+0x0/0x20
Code: 9c 02 81 44 89 c6 48 89 c7 e8 0a fb ff ff eb 0f 0f b7 f6 40 0f b6 ff 48 89 c2 e8 1c fb ff ff c9 c3 90 55 b8 00 01 00 00 48 89 e5 <f0> 66 0f c1 07 38 e0 74 06 f3 90 8a 07 eb f6 c9 c3 55 48 89 e5
RIP  [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
 RSP <ffff88013a413ba0>
CR2: 00000000000000b4
---[ end trace 8b6fd3d1bbb45aa9 ]---


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[Alan Stern]

On Thu, 9 Jul 2009, Jeremy Fitzhardinge wrote:

> I unplugged a Moschip 7840/7820 USB serial adapter, and it oopsed.  I had been using it
> with picoterm, but it was not open at the time I unplugged it.
>
> Thanks,
> J
>
> BUG: unable to handle kernel NULL pointer dereference at 00000000000000b4
> IP: [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
> PGD 12e19c067 PUD 12e19d067 PMD 0
> Oops: 0002 [#1] SMP
> last sysfs file: /sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq
> CPU 0
> Modules linked in: mos7840 usbserial joydev aes_x86_64 aes_generic hidp fuse ipt_MASQUERADE iptable_nat nf_nat rfcomm bridge stp llc bnep sco l2cap coretemp sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 cpufreq_ondemand acpi_cpufreq freq_table dm_multipath kvm_intel kvm uinput snd_hda_codec_conexant snd_hda_intel snd_hda_codec arc4 ecb snd_hwdep thinkpad_acpi iwlagn usb_storage snd_pcm hwmon btusb e1000e pcspkr iwlcore snd_timer iTCO_wdt lib80211 iTCO_vendor_support mac80211 i2c_i801 wmi snd bluetooth cfg80211 soundcore snd_page_alloc i915 drm i2c_algo_bit i2c_core video output [last unloaded: microcode]
> Pid: 27, comm: khubd Not tainted 2.6.29.5-191.fc11.x86_64 #1 74542GU
> RIP: 0010:[<ffffffff81029eb5>]  [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a

> Call Trace:
>  [<ffffffff81029f7f>] default_spin_lock_flags+0x9/0xe
>  [<ffffffff813abf94>] _spin_lock_irqsave+0x32/0x3b
>  [<ffffffffa0399afa>] mos7840_shutdown+0x93/0x120 [mos7840]

The fix for this bug is in 2.6.30.1, but it hasn't been added to the
2.6.29.stable tree (or 2.6.27.stable).

Alan Stern

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[Greg KH]

On Thu, Jul 09, 2009 at 05:36:30PM -0400, Alan Stern wrote:

> On Thu, 9 Jul 2009, Jeremy Fitzhardinge wrote:
>
> > I unplugged a Moschip 7840/7820 USB serial adapter, and it oopsed.  I had been using it
> > with picoterm, but it was not open at the time I unplugged it.
> >
> > Thanks,
> > J
> >
> > BUG: unable to handle kernel NULL pointer dereference at 00000000000000b4
> > IP: [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
> > PGD 12e19c067 PUD 12e19d067 PMD 0
> > Oops: 0002 [#1] SMP
> > last sysfs file: /sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq
> > CPU 0
> > Modules linked in: mos7840 usbserial joydev aes_x86_64 aes_generic hidp fuse ipt_MASQUERADE iptable_nat nf_nat rfcomm bridge stp llc bnep sco l2cap coretemp sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 cpufreq_ondemand acpi_cpufreq freq_table dm_multipath kvm_intel kvm uinput snd_hda_codec_conexant snd_hda_intel snd_hda_codec arc4 ecb snd_hwdep thinkpad_acpi iwlagn usb_storage snd_pcm hwmon btusb e1000e pcspkr iwlcore snd_timer iTCO_wdt lib80211 iTCO_vendor_support mac80211 i2c_i801 wmi snd bluetooth cfg80211 soundcore snd_page_alloc i915 drm i2c_algo_bit i2c_core video output [last unloaded: microcode]
> > Pid: 27, comm: khubd Not tainted 2.6.29.5-191.fc11.x86_64 #1 74542GU
> > RIP: 0010:[<ffffffff81029eb5>]  [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
>
> > Call Trace:
> >  [<ffffffff81029f7f>] default_spin_lock_flags+0x9/0xe
> >  [<ffffffff813abf94>] _spin_lock_irqsave+0x32/0x3b
> >  [<ffffffffa0399afa>] mos7840_shutdown+0x93/0x120 [mos7840]
>
> The fix for this bug is in 2.6.30.1, but it hasn't been added to the
> 2.6.29.stable tree (or 2.6.27.stable).

.29 is no longer being maintained.

I didn't think the change was needed for .27, is it?

thanks,

greg k-h
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[Alan Stern]

On Thu, 9 Jul 2009, Greg KH wrote:

> On Thu, Jul 09, 2009 at 05:36:30PM -0400, Alan Stern wrote:
> > On Thu, 9 Jul 2009, Jeremy Fitzhardinge wrote:
> >
> > > I unplugged a Moschip 7840/7820 USB serial adapter, and it oopsed.  I had been using it
> > > with picoterm, but it was not open at the time I unplugged it.
> > >
> > > Thanks,
> > > J
> > >
> > > BUG: unable to handle kernel NULL pointer dereference at 00000000000000b4
> > > IP: [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
> > > PGD 12e19c067 PUD 12e19d067 PMD 0
> > > Oops: 0002 [#1] SMP
> > > last sysfs file: /sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq
> > > CPU 0
> > > Modules linked in: mos7840 usbserial joydev aes_x86_64 aes_generic hidp fuse ipt_MASQUERADE iptable_nat nf_nat rfcomm bridge stp llc bnep sco l2cap coretemp sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 cpufreq_ondemand acpi_cpufreq freq_table dm_multipath kvm_intel kvm uinput snd_hda_codec_conexant snd_hda_intel snd_hda_codec arc4 ecb snd_hwdep thinkpad_acpi iwlagn usb_storage snd_pcm hwmon btusb e1000e pcspkr iwlcore snd_timer iTCO_wdt lib80211 iTCO_vendor_support mac80211 i2c_i801 wmi snd bluetooth cfg80211 soundcore snd_page_alloc i915 drm i2c_algo_bit i2c_core video output [last unloaded: microcode]
> > > Pid: 27, comm: khubd Not tainted 2.6.29.5-191.fc11.x86_64 #1 74542GU
> > > RIP: 0010:[<ffffffff81029eb5>]  [<ffffffff81029eb5>] __ticket_spin_lock+0x9/0x1a
> >
> > > Call Trace:
> > >  [<ffffffff81029f7f>] default_spin_lock_flags+0x9/0xe
> > >  [<ffffffff813abf94>] _spin_lock_irqsave+0x32/0x3b
> > >  [<ffffffffa0399afa>] mos7840_shutdown+0x93/0x120 [mos7840]
> >
> > The fix for this bug is in 2.6.30.1, but it hasn't been added to the
> > 2.6.29.stable tree (or 2.6.27.stable).
>
> .29 is no longer being maintained.
>
> I didn't think the change was needed for .27, is it?

No -- I forgot for a moment where the dividing line was.

Alan Stern

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