Package: openafs-modules-dkms
Version: 1.4.12.1+dfsg-4
Severity: normal

 This is my first time reporting a bug, so I am not sure if this is a new bug 
or its similar to this one.
  
   
    dpkg -l | grep openafs
        ii  openafs-client                      1.4.12.1+dfsg-4              
AFS distributed filesystem client support
        ii  openafs-modules-dkms                1.4.12.1+dfsg-4              
AFS distributed filesystem kernel module DKMS source

        How to reporduce 
        1- install openafs-modules-dkms openafs-client
        2- service openafs-client stop
        3- change AFS_DYNROOT=false in /etc/openafs/afs.conf.client ( let 
openafs client fail to load root.afs)
        4- service openafs-client start 
        5- service openafs-client stop
        system hangs  
        ================================================================
        using openafs-modules-dkms 1.4.12.1+dfsg-4

        [  719.950866] BUG: unable to handle kernel NULL pointer dereference at 
(null)
        [  719.950869] IP: [<ffffffff810c8e60>] bdi_forker_task+0x13f/0x2bd
        [  719.950873] PGD 0 
        [  719.950874] Oops: 0000 [#1] SMP 
        [  719.950876] last sysfs file: /sys/devices/virtual/bdi/afs/uevent
        [  719.950878] CPU 1 
        [  719.950878] Modules linked in: netconsole configfs ext4 jbd2 crc16 
snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer snd i2c_piix4
         i2c_core soundcore parport_pc psmouse snd_page_alloc parport joydev 
processor button serio_raw pcspkr ac evdev ext3 jbd mbcache dm_mod sg
          sr_mod usbhid hid cdrom sd_mod crc_t10dif ata_generic ata_piix ahci 
ohci_hcd e1000 libata ehci_hcd scsi_mod thermal thermal_sys usbcore n
          ls_base [last unloaded: openafs]
          [  719.950892] Pid: 25, comm: bdi-default Tainted: P        W  
2.6.32-5-amd64 #1 VirtualBox
          [  719.950893] RIP: 0010:[<ffffffff810c8e60>]  [<ffffffff810c8e60>] 
bdi_forker_task+0x13f/0x2bd
          [  719.950896] RSP: 0018:ffff88003fa7de50  EFLAGS: 00010202
          [  719.950897] RAX: 0000000000000044 RBX: 0000000000000000 RCX: 
ffffffff8142c000
          [  719.950898] RDX: 0000000000000000 RSI: 0000000000000082 RDI: 
0000000000000246
          [  719.950899] RBP: 0000000000000000 R08: 00000000000073ca R09: 
ffffffff814611f0
          [  719.950901] R10: 00000001018960c0 R11: ffffffff81027ff8 R12: 
ffffffff81473980
          [  719.950902] R13: ffff88003fa33f90 R14: ffff88003fa7de60 R15: 
ffffffff814739d0
          [  719.950903] FS:  0000000000000000(0000) GS:ffff880001880000(0000) 
knlGS:0000000000000000
          [  719.950905] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
          [  719.950906] CR2: 0000000000000000 CR3: 0000000001001000 CR4: 
00000000000006e0
          [  719.950913] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
          [  719.950914] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 
0000000000000400
          [  719.950916] Process bdi-default (pid: 25, threadinfo 
ffff88003fa7c000, task ffff88003fa33f90)
          [  719.950917] Stack:
          [  719.950918]  ffffffff814739c0 ffffffff814739b0 ffff88003fa33f90 
ffff88003fa34288
          [  719.950919] <0> 000000023f9afcd8 0000000000000000 ffff88003fa34288 
ffffffff8103aa76
          [  719.950921] <0> 00000003cc1c13c4 ffff88003f9afcc8 ffffffff81473980 
ffff88003f9afcd0
          [  719.950923] Call Trace:
          [  719.950925]  [<ffffffff8103aa76>] ? __wake_up_common+0x44/0x72
          [  719.950927]  [<ffffffff810c8d21>] ? bdi_forker_task+0x0/0x2bd
          [  719.950929]  [<ffffffff81064c4d>] ? kthread+0x79/0x81
          [  719.950931]  [<ffffffff81011baa>] ? child_rip+0xa/0x20
          [  719.950933]  [<ffffffff81064bd4>] ? kthread+0x0/0x81
          [  719.950934]  [<ffffffff81011ba0>] ? child_rip+0x0/0x20
          [  719.950935] Code: 8b 53 08 48 8d 7b 10 48 c7 c6 9b 85 0c 81 48 89 
50 08 48 89 02 48 b8 00 02 20 00 00 00 ad de 48 89 43 08 e8 df f2 fc 
          ff 48 89 eb <48> 8b 6d 00 48 81 fb 30 3a 47 81 0f 85 3a ff ff ff b8 
01 00 00 
          [  719.950945] RIP  [<ffffffff810c8e60>] bdi_forker_task+0x13f/0x2bd
          [  719.950947]  RSP <ffff88003fa7de50>
          [  719.950948] CR2: 0000000000000000
          [  719.950950] ---[ end trace 22ba0eb7caa8e3c2 ]---
          [  719.950951] Kernel panic - not syncing: Fatal exception in 
interrupt
          [  719.950952] Pid: 25, comm: bdi-default Tainted: P      D W  
2.6.32-5-amd64 #1
          [  719.950953] Call Trace:
          [  719.950956]  [<ffffffff812fa67a>] ? panic+0x86/0x143
          [  719.950959]  [<ffffffff8106861c>] ? down_trylock+0x28/0x2e
          [  719.950961]  [<ffffffff8104e71e>] ? console_unblank+0x16/0x60
          [  719.950963]  [<ffffffff812fd3b5>] ? oops_end+0xa7/0xb4
          [  719.950966]  [<ffffffff810323fc>] ? no_context+0x1e9/0x1f8
          [  719.950968]  [<ffffffff810325b1>] ? 
__bad_area_nosemaphore+0x1a6/0x1ca
          [  719.950970]  [<ffffffff8107747f>] ? is_module_text_address+0x5/0xc
          [  719.950972]  [<ffffffff810c8e1a>] ? bdi_forker_task+0xf9/0x2bd
          [  719.950974]  [<ffffffff812fc895>] ? page_fault+0x25/0x30
          [  719.950977]  [<ffffffff81027ff8>] ? flat_send_IPI_mask+0x0/0x5
          [  719.950979]  [<ffffffff810c8e60>] ? bdi_forker_task+0x13f/0x2bd
          [  719.950981]  [<ffffffff8103aa76>] ? __wake_up_common+0x44/0x72
          [  719.950983]  [<ffffffff810c8d21>] ? bdi_forker_task+0x0/0x2bd
          [  719.950984]  [<ffffffff81064c4d>] ? kthread+0x79/0x81
          [  719.950986]  [<ffffffff81011baa>] ? child_rip+0xa/0x20
          [  719.950987]  [<ffffffff81064bd4>] ? kthread+0x0/0x81
          [  719.950988]  [<ffffffff81011ba0>] ? child_rip+0x0/0x20


          =====================================================================
          using openafs-modules-dkms    1.4.14+dfsg-2~bpo60+1

          [   70.379011] ------------[ cut here ]------------
          [   70.379012] WARNING: at 
/build/buildd-linux-2.6_2.6.32-35-amd64-aZSlKL/linux-2.6-2.6.32/debian/build/source_amd64_none/mm/backing-dev.c
          :492 bdi_forker_task+0xf9/0x2bd()
          [   70.379014] Hardware name: VirtualBox
          [   70.379014] Modules linked in: netconsole configfs ext4 jbd2 crc16 
snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer snd soundcore
           snd_page_alloc psmouse i2c_piix4 parport_pc i2c_core parport joydev 
button pcspkr evdev serio_raw ac processor ext3 jbd mbcache dm_mod sg
            sr_mod usbhid hid cdrom sd_mod crc_t10dif ata_generic ahci ohci_hcd 
ehci_hcd ata_piix usbcore libata nls_base e1000 thermal thermal_sys s
                csi_mod [last unloaded: openafs]
                [   70.379027] Pid: 25, comm: bdi-default Tainted: P        W  
2.6.32-5-amd64 #1
                [   70.379027] Call Trace:
                [   70.379029]  [<ffffffff810c8e1a>] ? 
bdi_forker_task+0xf9/0x2bd
                [   70.379031]  [<ffffffff810c8e1a>] ? 
bdi_forker_task+0xf9/0x2bd
                [   70.379032]  [<ffffffff8104df20>] ? 
warn_slowpath_common+0x77/0xa3
                [   70.379034]  [<ffffffff810c8e1a>] ? 
bdi_forker_task+0xf9/0x2bd
                [   70.379036]  [<ffffffff8103aa76>] ? 
__wake_up_common+0x44/0x72
                [   70.379038]  [<ffffffff810c8d21>] ? bdi_forker_task+0x0/0x2bd
                [   70.379039]  [<ffffffff81064c4d>] ? kthread+0x79/0x81
                [   70.379041]  [<ffffffff81011baa>] ? child_rip+0xa/0x20
                [   70.379042]  [<ffffffff81064bd4>] ? kthread+0x0/0x81
                [   70.379043]  [<ffffffff81011ba0>] ? child_rip+0x0/0x20
                [   70.379044] ---[ end trace d79eb7cb9e6bff56 ]---
                [   70.379045] bdi ffff88003f34ec00/<NULL> is not registered!
                
=========================================================================
                -- System Information:
                Debian Release: 6.0.2
                  APT prefers proposed-updates
                    APT policy: (500, 'proposed-updates'), (500, 'stable')
                        Architecture: amd64 (x86_64)

                        Kernel: Linux 2.6.32-5-amd64 (SMP w/4 CPU cores)
                        Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 
(charmap=UTF-8)
                        Shell: /bin/sh linked to /bin/dash

                        Versions of packages openafs-modules-dkms depends on:
                        ii  bison                     1:2.4.1.dfsg-3 A parser 
generator that is compati
                        ii  dkms                      2.1.1.2-5      Dynamic 
Kernel Module Support Fram
                        ii  flex                      2.5.35-10      A fast 
lexical analyzer generator.
                        ii  libc6-dev                 2.11.2-10      Embedded 
GNU C Library: Developmen

                        openafs-modules-dkms recommends no packages.

                        openafs-modules-dkms suggests no packages.

                        -- no debconf information




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