http://bugzilla.kernel.org/show_bug.cgi?id=8105
------- Additional Comments From [EMAIL PROTECTED] 2007-03-01 12:16 -------
While compiling 2.6.21-rc2-git1, I managed to get the invalid pointer
dereference.
I guess it's not useful to you until i'm actually running the git release, but
just in case it is (or at least for record):
Just before it happened, acpi/battery/BAT1/state reported that my battery was
empty.
ACPI Error (psargs-0355): [STAT] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0537): Method parse/execution failed
[\_SB_.PCI0.LPCB.BAT1._BST] (Node c147f784), AE_NOT_FOUND
(later...:)
ACPI Exception (acpi_battery-0207): AE_NOT_FOUND, Evaluating _BST [20060707]
ACPI Error (psargs-0355): [STAT] Namespace lookup failure, AE_NOT_FOUND
ACPI Error (psparse-0537): Method parse/execution failed
[\_SB_.PCI0.LPCB.BAT1._BST] (Node c147f784), AE_NOT_FOUND
ACPI Exception (acpi_battery-0207): AE_NOT_FOUND, Evaluating _BST [20060707]
ACPI Error (psparse-0537): Method parse/execution failed
[\_SB_.PCI0.LPCB.BAT1._BIF] (Node c147f798), AE_AML_INTERNAL
ACPI Exception (acpi_battery-0148): AE_AML_INTERNAL, Evaluating _BIF [20060707]
ACPI Error (exresnte-0140): Object not a Package, type Integer [20060707]
ACPI Exception (dswexec-0458): AE_AML_OPERAND_TYPE, While resolving operands
for [OpcodeName unavailable] [20060707]
ACPI Error (psparse-0537): Method parse/execution failed
[\_SB_.PCI0.LPCB.BAT1._BST] (Node c147f784), AE_AML_OPERAND_TYPE
ACPI Exception (acpi_battery-0207): AE_AML_OPERAND_TYPE, Evaluating _BST
[20060707]
BUG: unable to handle kernel NULL pointer dereference at virtual address
0000000c
printing eip:
c0202f5b
*pde = 00000000
Oops: 0002 [#1]
PREEMPT
Modules linked in: tun fuse ppdev lp cpufreq_powersave acpi_cpufreq freq_table
video button battery ac pcmcia snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss
snd_mixer_oss yenta_socket rsrc_nonstatic pcmcia_core snd_pcm snd_timer
i2c_i801 psmouse rng_core snd soundcore snd_page_alloc serio_raw pcspkr
i2c_core usbhid uhci_hcd usbcore thermal processor fan
CPU: 0
EIP: 0060:[<c0202f5b>] Not tainted VLI
EFLAGS: 00010282 (2.6.20.1cs #3)
EIP is at acpi_ds_build_internal_object+0xd/0xef
eax: c9718600 ebx: dfa2bde4 ecx: 0000000c edx: cb14c6b0
esi: cb14c6b0 edi: c9718600 ebp: 0000000c esp: d74dfd94
ds: 007b es: 007b ss: 0068
Process kded (pid: 4192, ti=d74de000 task=d74d1a70 task.ti=d74de000)
Stack: d74dfda4 cb14c5ec 00000286 dfa2bde4 dfa2bde4 dfa2bde4 cb14c6b0 0000000c
cd2854b0 c0203178 00000000 c9718600 c9718600 dfa2b27c 00000004 00000012
c0201a62 d74dfde0 cd2854b0 dfa2bde4 c9718600 cb14c5ec cd2854b0 00000012
Call Trace:
[<c0203178>] acpi_ds_build_internal_package_obj+0xe6/0x102
[<c0201a62>] acpi_ds_eval_data_object_operands+0xb8/0xef
[<c0202605>] acpi_ds_exec_end_op+0x268/0x3cf
[<c0210599>] acpi_ps_get_next_simple_arg+0xe3/0xed
[<c0211701>] acpi_ps_append_arg+0x16/0x75
[<c021139c>] acpi_ps_parse_loop+0x5b0/0x8cc
[<c02109fe>] acpi_ps_parse_aml+0x60/0x1ff
[<c02044b8>] acpi_ds_init_aml_walk+0xb4/0xfe
[<c0211ae2>] acpi_ps_execute_pass+0x7d/0x90
[<c0211bed>] acpi_ps_execute_method+0xc8/0x157
[<c020efcd>] acpi_ns_evaluate+0x9d/0xfc
[<c020ec39>] acpi_evaluate_object+0x121/0x1c8
[<c0173f5d>] seq_printf+0x2e/0x52
[<e0923496>] acpi_battery_read_state+0xa2/0x2c9 [battery]
[<c0174420>] seq_read+0x6a/0x2aa
[<c015c6b3>] vfs_read+0x89/0x134
[<c01743b6>] seq_read+0x0/0x2aa
[<c015ca76>] sys_read+0x41/0x6a
[<c0102da0>] sysenter_past_esp+0x5d/0x81
=======================
Code: 89 02 00 00 a1 f8 91 31 c0 89 04 24 e8 92 2a 01 00 b8 05 30 00 00 83 c4
18 5b 5e 5f 5d c3 55 57 56 53 83 ec 14 89 c7 89 d6 89 cd <c7> 01 00 00 00 00 66
83 7a 06 2d 75 72 83 7a 10 00 75 6c 8b 52
EIP: [<c0202f5b>] acpi_ds_build_internal_object+0xd/0xef SS:ESP 0068:d74dfd94
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