Bug 13514

Summary:	acer_wmi causes stack corruption
Product:	ACPI	Reporter:	Rus (harbour)
Component:	Other	Assignee:	acpi_other
Status:	CLOSED PATCH_ALREADY_AVAILABLE
Severity:	normal	CC:	acpi-bugzilla, carlos, herton, lenb, rjw
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.30	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	13070

Description Rus 2009-06-12 08:13:45 UTC

Hi,

If someone enable stack protector and modprobe acer_wmi the oops/panic occured

CONFIG_CC_STACKPROTECTOR_ALL=y
CONFIG_CC_STACKPROTECTOR=y

I do not have serial console, so can't capture oops, but it 100% reproducable.

TIA

Comment 1 Herton Ronaldo Krzesinski 2009-06-18 20:42:10 UTC

Arch linux has a fix for this in their tree, the fix looks good:

http://projects.archlinux.org/?p=linux-2.6-ARCH.git;a=blob_plain;f=patches/wmi.patch;h=a8b98daaa08a28a06d84d745be8cf82644c490e4;hb=99578463d88de930611e6e1714ec748d8b2b3ef6

Comment 2 Carlos Corbacho 2009-06-18 21:53:41 UTC

This patch was submitted to the ACPI mailing list last week & acked by me. I'm still waiting for Len to pull it.

http://patchwork.kernel.org/patch/29082/

I've pinged Len again to apply it.

Comment 3 Rafael J. Wysocki 2009-07-30 19:14:29 UTC

On Thursday 30 July 2009, Harbour wrote:
> On Sun, 26 Jul 2009, Rafael J. Wysocki wrote:
> 
> Still present at 2.6.30.3
> 
> :This message has been generated automatically as a part of a report
> :of regressions introduced between 2.6.29 and 2.6.30.
> :
> :The following bug entry is on the current list of known regressions
> :introduced between 2.6.29 and 2.6.30.  Please verify if it still should
> :be listed and let me know (either way).
> :
> :
> :Bug-Entry    : http://bugzilla.kernel.org/show_bug.cgi?id=13514
> :Subject              : acer_wmi causes stack corruption
> :Submitter    : Rus <harbour@sfinx.od.ua>
> :Date         : 2009-06-12 08:13 (45 days old)

Comment 4 Rafael J. Wysocki 2009-08-03 14:29:58 UTC

On Monday 03 August 2009, Harbour wrote:
> On Sun, 2 Aug 2009, Rafael J. Wysocki wrote:
> 
> :Bug-Entry    : http://bugzilla.kernel.org/show_bug.cgi?id=13514
> :Subject              : acer_wmi causes stack corruption
> :Submitter    : Rus <harbour@sfinx.od.ua>
> :Date         : 2009-06-12 08:13 (52 days old)
> 
> Still present in 2.6.30.4

Comment 5 Rafael J. Wysocki 2009-08-26 20:07:51 UTC

Handled-By : Costantino Leandro <lcostantino@gmail.com>
Patch : http://patchwork.kernel.org/patch/29082/
Notify-Also : Carlos Corbacho <carlos@strangeworlds.co.uk>

Comment 6 Len Brown 2009-08-27 17:35:46 UTC

commit f3d83e2415445e5b157bef404d38674e9e8de169
Author: Costantino Leandro <lcostantino@gmail.com>
Date:   Wed Aug 26 14:29:28 2009 -0700

    wmi: fix kernel panic when stack protection enabled.

shipped in linux-2.6.31-rc7-git5

closed.