Re: [>=2.6.23][BUG] Oops on power disconnection

[Andrew Morton <akpm@linux-foundation.org>]

On Sun, 30 Mar 2008 19:21:39 +0530 "Sanjeev Aditya Naga" <sanjeev.kernel@gmail.com> wrote:

> Hi,
> 
>  This happens everytime there is a power disconnection
>  (switching to battery). Complete dmesg attached. This
>  in particular is of kernel 2.6.24.3.
> 
>  Greetings,
>  Kind Regards,
>  Sanjeev
> 
>  BUG: unable to handle kernel NULL pointer dereference at virtual
>  address 00000020
>  printing eip: c04c4716 *pde = 578c2067
>  Oops: 0000 [#1] SMP
>  Modules linked in: cbc(U) geode_aes(U) blkcipher(U) aes_i586(U)
>  aes_generic(U) dm_crypt(U) ipt_MASQUERADE(U) iptable_nat(U) nf_nat(U)
>  bridge(U) autofs4(U) nf_conntrack_ipv4(U) xt_state(U) nf_conntrack(U)
>  xt_tcpudp(U) ipt_REJECT(U) iptable_filter(U) ip_tables(U) x_tables(U)
>  cpufreq_ondemand(U) acpi_cpufreq(U) fuse(U) loop(U) dm_mirror(U)
>  dm_multipath(U) dm_mod(U) ipv6(U) snd_hda_intel(U) snd_seq_dummy(U)
>  snd_seq_oss(U) snd_seq_midi_event(U) snd_seq(U) snd_seq_device(U)
>  snd_pcm_oss(U) sr_mod(U) snd_mixer_oss(U) snd_pcm(U) 8139cp(U)
>  snd_timer(U) button(U) 8139too(U) mii(U) snd_page_alloc(U) cdrom(U)
>  video(U) output(U) snd_hwdep(U) ac(U) snd(U) pcspkr(U) i2c_piix4(U)
>  i2c_core(U) battery(U) joydev(U) soundcore(U) sg(U) pata_atiixp(U)
>  pata_acpi(U) sata_sil(U) ata_generic(U) libata(U) sd_mod(U)
>  scsi_mod(U) ext3(U) jbd(U) mbcache(U) uhci_hcd(U) ohci_hcd(U)
>  ehci_hcd(U)
> 
>  Pid: 69, comm: kacpi_notify Not tainted (2.6.24.3 #5)
>  EIP: 0060:[<c04c4716>] EFLAGS: 00010246 CPU: 0
>  EIP is at sysfs_addrm_start+0x21/0x81
>  EAX: c04c47d7 EBX: 00000000 ECX: 00000000 EDX: f78b8000
>  ESI: f78b8eb8 EDI: f78b8ec8 EBP: 00000000 ESP: f78b8ea4
>   DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
>  Process kacpi_notify (pid: 69, ti=f78b8000 task=f78d8000 task.ti=f78b8000)
>  Stack: f229ff54 f229ff54 f5b8d390 fffffff4 c04c4b45 00000000 00000000 00000000
>        00000000 f229ff54 00000000 00000000 f782601c c04c4bab f78b8ee0 c04fe65d
>        f229ff54 c04fe8a8 f722e67f ffffffff ffffffff 00000007 f722e678 f78261d8
>  Call Trace:
>   [<c04c4b45>] create_dir+0x33/0x6c
>   [<c04c4bab>] sysfs_create_dir+0x2d/0x40
>   [<c04fe65d>] kobject_get+0xf/0x13
>   [<c04fe8a8>] kobject_add+0xdd/0x176
>   [<c04fe9eb>] kobject_register+0x19/0x2d
>   [<c05b0ad0>] cpuidle_add_state_sysfs+0x7b/0xe4
>   [<c052660e>] acpi_os_execute_notify+0x0/0x2b
>   [<c05b03fd>] cpuidle_enable_device+0x31/0x9b
>   [<c0545923>] acpi_processor_cst_has_changed+0x40/0x55
>   [<c0543ae2>] acpi_processor_notify+0x8b/0xf4
>   [<c052bcbb>] acpi_ev_notify_dispatch+0x4c/0x55
>   [<c0526630>] acpi_os_execute_notify+0x22/0x2b
>   [<c052660e>] acpi_os_execute_notify+0x0/0x2b
>   [<c043c212>] run_workqueue+0x7d/0x107
>   [<c043fa5b>] prepare_to_wait+0x28/0x45
>   [<c043c35a>] worker_thread+0xbe/0xca
>   [<c043f8ff>] autoremove_wake_function+0x0/0x35
>   [<c043c29c>] worker_thread+0x0/0xca
>   [<c043f679>] kthread+0x38/0x5d
>   [<c043f641>] kthread+0x0/0x5d
>   [<c0406477>] kernel_thread_helper+0x7/0x10
>   =======================
>  Code: c0 89 31 83 c4 14 5b 5e 5f c3 57 b9 04 00 00 00 56 89 c7 53 89
>  c6 83 ec 04 89 d3 31 c0 f3 ab b8 903f 72 c0 89 16 e8 6a cf 16 00 <8b>
>  53 20 b9 ec 42 4c c0 a1 84 e4 83 c0 89 1c 24 e8 44 6e fd ff
>  EIP: [<c04c4716>] sysfs_addrm_start+0x21/0x81 SS:ESP 0068:f78b8ea4

Looks like a cpuidle problem (or at least acpi).

I seem to recall having seen other reports of this?