http://bugzilla.kernel.org/show_bug.cgi?id=5899
Summary: Oops on "rmmod processor" reproducible
Kernel Version: 2.6.15
Status: NEW
Severity: normal
Owner: [EMAIL PROTECTED]
Submitter: [EMAIL PROTECTED]
Most recent kernel where this bug did not occur:
Unknown. Also there under 2.6.13.
Distribution:
(IMHO irrelevant) Knoppix, self compiled vanilla kernel
Hardware Environment:
(Probably reproducible with all supporting ix86 processors) seen with a Celeron
1GHz and "Mobile Genuine Intel(R) processor 1100MHz"
Software Environment:
bash> :-)
Problem Description:
Kernel Oops on "rmmod processor"
Steps to reproduce:
boot with "nolapic noapic acpi=off"
the "processor" module will still be successfully loaded by some of Knoppix'
startup scripts, "rmmod processor" produces:
Unable to handle kernel NULL pointer dereference at virtual address 00000004
printing eip:
c020d2c9
*pde = 00000000
Oops: 0002 [#1]
Modules linked in: shpchp pci_hotplug hw_random ehci_hcd autofs4 af_packet
vfat fat e100 mii i2c_i801 i2c_core parport_pc parport ohci1394 ieee1394
usbhid uhci_hcd usbcore processor
CPU: 0
EIP: 0060:[<c020d2c9>] Not tainted VLI
EFLAGS: 00010246 (2.6.15)
EIP is at acpi_bus_unregister_driver+0x21/0x38
eax: 00000000 ebx: d0102640 ecx: ceaa3f68 edx: 00000000
esi: 00000000 edi: 00000880 ebp: ceaa3f58 esp: ceaa3f50
ds: 007b es: 007b ss: 0068
Process rmmod (pid: 2669, threadinfo=ceaa2000 task=ce745070)
Stack: d0102a00 00000000 ceaa3f60 d01000fc ceaa3fb4 c012f484 00000000 636f7270
6f737365 b7ef0072 b7efd000 ceaa3fa0 c0147ad6 b7efd000 b7efe000 ce63cc80
ceda3b1c ce63cc80 ce63ccb0 b7efd000 ceaa3fb4 00147b4a b7efd000
bfc124a8
Call Trace:
[<c0103a8a>] show_stack+0xa9/0xb1
[<c0103bf6>] show_registers+0x14b/0x1bf
[<c0103db0>] die+0xc6/0x135
[<c01161d6>] do_page_fault+0x3f6/0x54a
[<c0103763>] error_code+0x4f/0x54
[<d01000fc>] acpi_processor_exit+0x1c/0x2e [processor]
[<c012f484>] sys_delete_module+0x13c/0x14f
[<c0102ca9>] syscall_call+0x7/0xb
Code: 04 89 d0 e8 fd fe ff ff 5d c3 55 89 e5 56 31 f6 85 c0 53 89 c3 74 20
e8 56 ff ff ff 8b 83 a8 00 00 00 85 c0 75 16 8b 53 04 8b 03 <89> 50 04 89 02
89 5b 04 89 1b eb 05 be ea ff ff ff 5b 89 f0 5e
I guess, it should be something trivial, just don't know what's the correct fix
myself - perhaps, the module should not let itself load at all? Not including
any additional information, complete dmesg, lspci, etc. available on request,
just don't think they are too important:-)
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